| Message ID | 1645455086-9359-2-git-send-email-quic_vpolimer@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Add PSR support for eDP | expand |
On Mon, 21 Feb 2022 at 17:52, Vinod Polimera <quic_vpolimer@quicinc.com> wrote: > > Add support for basic panel self refresh (PSR) feature for eDP. > Add a new interface to set PSR state in the sink from DPU. > Program the eDP controller to issue PSR enter and exit SDP to > the sink. > > Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com> > > Changes in v2: > - Use dp bridge to set psr entry/exit instead of dpu_enocder > - Don't modify whitespaces > - set self refresh aware from atomic_check > - set self refresh aware only if psr is supported > - provide a stub for msm_dp_display_set_psr > --- > drivers/gpu/drm/msm/dp/dp_catalog.c | 81 +++++++++++++++++ > drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + > drivers/gpu/drm/msm/dp/dp_ctrl.c | 63 +++++++++++++ > drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 + > drivers/gpu/drm/msm/dp/dp_display.c | 14 +++ > drivers/gpu/drm/msm/dp/dp_display.h | 1 + > drivers/gpu/drm/msm/dp/dp_drm.c | 177 ++++++++++++++++++++++++++++++++++-- > drivers/gpu/drm/msm/dp/dp_link.c | 22 +++++ > drivers/gpu/drm/msm/dp/dp_panel.c | 21 +++++ > drivers/gpu/drm/msm/dp/dp_panel.h | 6 ++ > drivers/gpu/drm/msm/dp/dp_reg.h | 19 ++++ > drivers/gpu/drm/msm/msm_drv.h | 6 ++ > 12 files changed, 411 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c > index 8a6d3ea..3cd223d 100644 > --- a/drivers/gpu/drm/msm/dp/dp_catalog.c > +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c > @@ -45,6 +45,14 @@ > #define DP_INTERRUPT_STATUS2_MASK \ > (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) > > +#define DP_INTERRUPT_STATUS4 \ > + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ > + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) > + > +#define DP_INTERRUPT_MASK4 \ > + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ > + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) > + > struct dp_catalog_private { > struct device *dev; > struct dp_io *io; > @@ -343,6 +351,20 @@ void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog) > ln_mapping); > } > > +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, > + bool enable) > +{ > + u32 mainlink_ctrl; > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + > + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); > + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; > + mainlink_ctrl |= (enable & DP_MAINLINK_CTRL_ENABLE); > + > + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); > +} > + > void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, > bool enable) > { > @@ -581,6 +603,51 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) > dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); > } > > +static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) > +{ > + /* trigger sdp */ > + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x1); > + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x0); > +} > + > +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog) > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 psr_config; > + > + /* enable PSR1 function */ > + psr_config = dp_read_link(catalog, REG_PSR_CONFIG); > + psr_config |= BIT(0); > + dp_write_link(catalog, REG_PSR_CONFIG, psr_config); > + > + dp_write_ahb(catalog, REG_DP_INTR_MASK4, DP_INTERRUPT_MASK4); > + dp_catalog_enable_sdp(catalog); > +} > + > +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter) > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 psr_cmd; > + > + psr_cmd = dp_read_link(catalog, REG_PSR_CMD); > + > + /* > + * BIT(0) - send psr entry SDP > + * BIT(1) - sned psr exit SDP > + */ > + psr_cmd &= ~(BIT(0) | BIT(1)); > + > + if (enter) > + psr_cmd |= BIT(0); > + else > + psr_cmd |= BIT(1); > + > + dp_catalog_enable_sdp(catalog); > + dp_write_link(catalog, REG_PSR_CMD, psr_cmd); > +} > + > u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) > { > struct dp_catalog_private *catalog = container_of(dp_catalog, > @@ -608,6 +675,20 @@ u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) > return isr; > } > > +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog) > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 intr, intr_ack; > + > + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS4); > + intr_ack = (intr & DP_INTERRUPT_STATUS4) > + << DP_INTERRUPT_STATUS_ACK_SHIFT; > + dp_write_ahb(catalog, REG_DP_INTR_STATUS4, intr_ack); > + > + return intr; > +} > + > int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) > { > struct dp_catalog_private *catalog = container_of(dp_catalog, > diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h > index 6965afa..9b1b199 100644 > --- a/drivers/gpu/drm/msm/dp/dp_catalog.h > +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h > @@ -91,6 +91,7 @@ void dp_catalog_ctrl_state_ctrl(struct dp_catalog *dp_catalog, u32 state); > void dp_catalog_ctrl_config_ctrl(struct dp_catalog *dp_catalog, u32 config); > void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable); > +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, bool enable); > void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb); > void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, > u32 stream_rate_khz, bool fixed_nvid); > @@ -101,12 +102,15 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); > void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, > u32 intr_mask, bool en); > void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); > +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); > +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); > u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); > u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); > int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, > u8 p_level); > int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); > +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, > u32 dp_tu, u32 valid_boundary, > u32 valid_boundary2); > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c > index 88ca6c3..ba828ea 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c > @@ -21,6 +21,7 @@ > > #define DP_KHZ_TO_HZ 1000 > #define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */ > +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / 1000) /* 300 ms */ > #define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) > > #define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) > @@ -78,6 +79,7 @@ struct dp_ctrl_private { > struct dp_catalog *catalog; > > struct completion idle_comp; > + struct completion psr_op_comp; > struct completion video_comp; > }; > > @@ -151,6 +153,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) > config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; > config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; > > + if (ctrl->panel->psr_cap.version) > + config |= DP_CONFIGURATION_CTRL_SEND_VSC; > + > dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); > } > > @@ -1365,6 +1370,52 @@ static int dp_ctrl_enable_stream_clocks(struct dp_ctrl_private *ctrl) > return ret; > } > > +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl) > +{ > + struct dp_ctrl_private *ctrl; > + u8 psr_config; > + > + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > + > + if (!ctrl->panel->psr_cap.version) > + return; > + > + dp_catalog_ctrl_config_psr(ctrl->catalog); > + > + psr_config = DP_PSR_ENABLE; > + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &psr_config, 1); > +} > + > +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter) > +{ > + struct dp_ctrl_private *ctrl; > + > + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > + > + if (!ctrl->panel->psr_cap.version) > + return; > + > + if (enter) { > + reinit_completion(&ctrl->psr_op_comp); > + dp_catalog_ctrl_set_psr(ctrl->catalog, true); > + > + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, > + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { > + DRM_ERROR("PSR_ENTRY timedout\n"); > + dp_catalog_ctrl_set_psr(ctrl->catalog, false); > + return; > + } > + > + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); > + > + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, false); > + } else { > + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, true); > + > + dp_catalog_ctrl_set_psr(ctrl->catalog, false); > + } > +} > + > int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) > { > struct dp_ctrl_private *ctrl; > @@ -1964,6 +2015,17 @@ void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) > > ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > > + if (ctrl->panel->psr_cap.version) { > + isr = dp_catalog_ctrl_get_psr_interrupt(ctrl->catalog); > + > + if (isr == 0x1) > + DRM_DEBUG_DP("PSR frame update done\n"); > + else if (isr == 0x10) > + DRM_DEBUG_DP("PSR exit done\n"); > + > + complete(&ctrl->psr_op_comp); > + } > + > isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); > > if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { > @@ -2010,6 +2072,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, > dev_err(dev, "failed to add DP OPP table\n"); > > init_completion(&ctrl->idle_comp); > + init_completion(&ctrl->psr_op_comp); > init_completion(&ctrl->video_comp); > > /* in parameters */ > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h > index 2363a2d..f623035 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h > @@ -34,4 +34,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, > struct dp_power *power, struct dp_catalog *catalog, > struct dp_parser *parser); > > +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable); > +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl); > + > #endif /* _DP_CTRL_H_ */ > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c > index 5d314e6..c8d02fb 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -347,6 +347,8 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) > > edid = dp->panel->edid; > > + dp->dp_display.psr_supported = !!dp->panel->psr_cap.version; > + > dp->audio_supported = drm_detect_monitor_audio(edid); > dp_panel_handle_sink_request(dp->panel); > > @@ -871,6 +873,10 @@ static int dp_display_post_enable(struct msm_dp *dp_display) > > /* signal the connect event late to synchronize video and display */ > dp_display_handle_plugged_change(dp_display, true); > + > + if (dp_display->psr_supported) > + dp_ctrl_config_psr(dp->ctrl); > + > return 0; > } > > @@ -1037,6 +1043,14 @@ static void dp_display_config_hpd(struct dp_display_private *dp) > enable_irq(dp->irq); > } > > +void msm_dp_display_set_psr(struct msm_dp *dp_display, bool enter) If this function is used only by the dp code, there is no need to pollute the msm_dp_* namespace. Please rename to dp_display_set_psr() and remove declaration from msm_drv.h. > +{ > + struct dp_display_private *dp; > + > + dp = container_of(dp_display, struct dp_display_private, dp_display); > + dp_ctrl_set_psr(dp->ctrl, enter); > +} > + > static int hpd_event_thread(void *data) > { > struct dp_display_private *dp_priv; > diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h > index e3adcd5..6f512f3 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.h > +++ b/drivers/gpu/drm/msm/dp/dp_display.h > @@ -28,6 +28,7 @@ struct msm_dp { > > u32 max_dp_lanes; > struct dp_audio *dp_audio; > + bool psr_supported; > }; > > int dp_display_set_plugged_cb(struct msm_dp *dp_display, > diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c > index 2436329..d26ca6a 100644 > --- a/drivers/gpu/drm/msm/dp/dp_drm.c > +++ b/drivers/gpu/drm/msm/dp/dp_drm.c > @@ -142,6 +142,35 @@ static enum drm_mode_status edp_connector_mode_valid( > return MODE_OK; > } > > + > + Extra empty lines. > +static int edp_connector_atomic_check(struct drm_connector *connector, > + struct drm_atomic_state *state) > +{ > + struct msm_dp *dp; > + struct drm_connector_state *conn_state; > + struct drm_crtc_state *crtc_state; > + > + dp = to_dp_connector(connector)->dp_display; > + conn_state = drm_atomic_get_new_connector_state(state, connector); > + if (WARN_ON(!conn_state)) > + return -ENODEV; > + > + conn_state->self_refresh_aware = true; I see that analogix bridge does the same. However I think it would be better to set self_refresh_aware to true only if the actual attached panel supports PSR. > + > + if (!conn_state->crtc) > + return 0; > + > + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); > + if (!crtc_state) > + return 0; > + > + if (crtc_state->self_refresh_active && !dp->psr_supported) > + return -EINVAL; > + > + return 0; > +} > + > static const struct drm_connector_funcs dp_connector_funcs = { > .detect = dp_connector_detect, > .fill_modes = drm_helper_probe_single_connector_modes, > @@ -151,6 +180,11 @@ static const struct drm_connector_funcs dp_connector_funcs = { > .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > }; > > +static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { > + .get_modes = dp_connector_get_modes, > + .mode_valid = dp_connector_mode_valid, > +}; > + Unnecessary movement. > static const struct drm_connector_funcs edp_connector_funcs = { > .fill_modes = drm_helper_probe_single_connector_modes, > .destroy = drm_connector_cleanup, > @@ -159,12 +193,8 @@ static const struct drm_connector_funcs edp_connector_funcs = { > .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > }; > > -static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { > - .get_modes = dp_connector_get_modes, > - .mode_valid = dp_connector_mode_valid, > -}; > - > static const struct drm_connector_helper_funcs edp_connector_helper_funcs = { > + .atomic_check = edp_connector_atomic_check, > .get_modes = edp_connector_get_modes, > .mode_valid = edp_connector_mode_valid, > }; > @@ -258,6 +288,130 @@ static void dp_bridge_post_disable(struct drm_bridge *drm_bridge) > msm_dp_display_disable(dp_display, drm_bridge->encoder); > } > > +static struct drm_crtc *dp_bridge_get_old_connector_crtc(struct msm_dp *dp, > + struct drm_atomic_state *state) > +{ > + struct drm_encoder *encoder = dp->encoder; > + struct drm_connector *connector; > + struct drm_connector_state *conn_state; > + > + connector = drm_atomic_get_old_connector_for_encoder(state, encoder); > + if (!connector) > + return NULL; > + > + conn_state = drm_atomic_get_old_connector_state(state, connector); > + if (!conn_state) > + return NULL; > + > + return conn_state->crtc; > +} > + > +static struct drm_crtc *dp_bridge_get_new_connector_crtc(struct msm_dp *dp, > + struct drm_atomic_state *state) > +{ > + struct drm_encoder *encoder = dp->encoder; > + struct drm_connector *connector; > + struct drm_connector_state *conn_state; > + > + connector = drm_atomic_get_new_connector_for_encoder(state, encoder); > + if (!connector) > + return NULL; > + > + conn_state = drm_atomic_get_new_connector_state(state, connector); > + if (!conn_state) > + return NULL; > + > + return conn_state->crtc; > +} This code being repeated over and over again deserves to become a new atomic helper. Please move it to drm_atomic.c or .h > + > +static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *old_crtc_state; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_new_connector_crtc(dp_display, old_state); > + if (!crtc) > + return; > + > + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); Generic remark to this and the following functions. I don't quite like the idea of the bridge drivers poking into the crtc state. This looks like a breach of layering. The code looks similar to analogix'es one. Maybe we should consider moving it into common helpers? This would require adding enable/disable_srr as drm_bridge ops. Or to introduce drm_bridge_helper_funcs. > + > + /* Exit from self refresh mode */ > + if (old_crtc_state && old_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, false); > + return; > + } > + > + msm_dp_display_enable(dp_display, drm_bridge->encoder); > +} > + > +static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); > + if (!crtc) > + goto out; > + > + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); > + if (!new_crtc_state) > + goto out; > + > + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); > + if (!old_crtc_state) > + goto out; > + > + /* > + * Set self refresh mode if current crtc state is active. > + * If old crtc state is active, exit psr before disabling > + * the controller. Observed sink stuck in self refresh > + * if psr exit is skipped when screen off occurs with > + * sink in psr mode. > + */ > + if (new_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, true); > + return; > + } else if (old_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, false); > + return; I think the return here is wrong. Where do we support the case when the old state was the PSR, but the new states tells us to disable the crtc? If I understand the drm code correctly, it's a legit case. > + } > + > +out: > + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder); > +} > + > +static void edp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state = NULL; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); > + if (!crtc) > + return; > + > + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); > + if (!new_crtc_state) > + return; > + > + /* Self refresh mode is set in dp_bridge_disable. Skip disable */ edp_bridge_atomic_disable? > + if (new_crtc_state->self_refresh_active) > + return; > + > + msm_dp_display_disable(dp_display, drm_bridge->encoder); > +} > + > static const struct drm_bridge_funcs dp_bridge_ops = { > .enable = dp_bridge_enable, > .disable = dp_bridge_disable, > @@ -265,6 +419,16 @@ static const struct drm_bridge_funcs dp_bridge_ops = { > .mode_set = dp_bridge_mode_set, > }; > > +static const struct drm_bridge_funcs edp_bridge_ops = { > + .atomic_enable = edp_bridge_atomic_enable, > + .atomic_disable = edp_bridge_atomic_disable, > + .atomic_post_disable = edp_bridge_atomic_post_disable, > + .mode_set = dp_bridge_mode_set, > + .atomic_reset = drm_atomic_helper_bridge_reset, > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > +}; > + > struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, > struct drm_encoder *encoder) > { > @@ -279,7 +443,8 @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_devi > dp_bridge->dp_display = dp_display; > > bridge = &dp_bridge->bridge; > - bridge->funcs = &dp_bridge_ops; > + bridge->funcs = (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) ? > + &edp_bridge_ops : &dp_bridge_ops; > bridge->encoder = encoder; > > rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); > diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c > index d4d31e5..5503c29 100644 > --- a/drivers/gpu/drm/msm/dp/dp_link.c > +++ b/drivers/gpu/drm/msm/dp/dp_link.c > @@ -924,6 +924,26 @@ static int dp_link_process_phy_test_pattern_request( > return 0; > } > > +static int dp_link_psr_status(struct dp_link_private *link) > +{ > + u8 status[2]; > + > + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); > + > + if (status[0] & DP_PSR_LINK_CRC_ERROR) > + DRM_ERROR("PSR LINK CRC ERROR\n"); > + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) > + DRM_ERROR("PSR RFB STORAGE ERROR\n"); > + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) > + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); > + else if (status[1] & DP_PSR_CAPS_CHANGE) > + DRM_INFO("PSR Capability Change\n"); DRM_DEBUG_DP > + else > + return 0; > + > + return 1; > +} > + > static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) > { > return link_status[r - DP_LANE0_1_STATUS]; > @@ -1042,6 +1062,8 @@ int dp_link_process_request(struct dp_link *dp_link) > dp_link->sink_request |= DP_TEST_LINK_TRAINING; > } else if (!dp_link_process_phy_test_pattern_request(link)) { > dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; > + } else if (dp_link_psr_status(link)) { > + DRM_INFO("PSR IRQ_HPD received\n"); DRM_DEBUG_DP > } else { > ret = dp_link_process_link_status_update(link); > if (!ret) { > diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c > index 71db10c..e128d73 100644 > --- a/drivers/gpu/drm/msm/dp/dp_panel.c > +++ b/drivers/gpu/drm/msm/dp/dp_panel.c > @@ -19,6 +19,26 @@ struct dp_panel_private { > bool aux_cfg_update_done; > }; > > +static void dp_panel_read_psr_cap(struct dp_panel_private *panel) > +{ > + ssize_t rlen; > + struct dp_panel *dp_panel; > + > + dp_panel = &panel->dp_panel; > + > + /* edp sink */ > + if (dp_panel->dpcd[DP_EDP_CONFIGURATION_CAP]) { > + rlen = drm_dp_dpcd_read(panel->aux, DP_PSR_SUPPORT, > + &dp_panel->psr_cap, 2); > + if (rlen == 2) { > + DRM_DEBUG_DP("psr version: 0x%x, psr_cap: 0x%x\n", > + dp_panel->psr_cap.version, > + dp_panel->psr_cap.capabilities); > + } else > + DRM_ERROR("failed to read psr info, rlen=%zd\n", rlen); > + } > +} > + > static int dp_panel_read_dpcd(struct dp_panel *dp_panel) > { > int rc = 0; > @@ -104,6 +124,7 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) > } > } > > + dp_panel_read_psr_cap(panel); > end: > return rc; > } > diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h > index 9023e5b..631657a 100644 > --- a/drivers/gpu/drm/msm/dp/dp_panel.h > +++ b/drivers/gpu/drm/msm/dp/dp_panel.h > @@ -34,6 +34,11 @@ struct dp_panel_in { > struct dp_catalog *catalog; > }; > > +struct dp_panel_psr { > + u8 version; > + u8 capabilities; > +}; > + > struct dp_panel { > /* dpcd raw data */ > u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; > @@ -46,6 +51,7 @@ struct dp_panel { > struct edid *edid; > struct drm_connector *connector; > struct dp_display_mode dp_mode; > + struct dp_panel_psr psr_cap; > bool video_test; > > u32 vic; > diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h > index 2686028..7a0b052 100644 > --- a/drivers/gpu/drm/msm/dp/dp_reg.h > +++ b/drivers/gpu/drm/msm/dp/dp_reg.h > @@ -22,6 +22,20 @@ > #define REG_DP_INTR_STATUS2 (0x00000024) > #define REG_DP_INTR_STATUS3 (0x00000028) > > +#define REG_DP_INTR_STATUS4 (0x0000002C) > +#define PSR_UPDATE_INT (0x00000001) > +#define PSR_CAPTURE_INT (0x00000004) > +#define PSR_EXIT_INT (0x00000010) > +#define PSR_UPDATE_ERROR_INT (0x00000040) > +#define PSR_WAKE_ERROR_INT (0x00000100) > + > +#define REG_DP_INTR_MASK4 (0x00000030) > +#define PSR_UPDATE_MASK (0x00000001) > +#define PSR_CAPTURE_MASK (0x00000002) > +#define PSR_EXIT_MASK (0x00000004) > +#define PSR_UPDATE_ERROR_MASK (0x00000008) > +#define PSR_WAKE_ERROR_MASK (0x00000010) > + > #define REG_DP_DP_HPD_CTRL (0x00000000) > #define DP_DP_HPD_CTRL_HPD_EN (0x00000001) > > @@ -164,6 +178,9 @@ > #define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) > #define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) > > +#define REG_PSR_CONFIG (0x00000100) > +#define REG_PSR_CMD (0x00000110) > + > #define MMSS_DP_PSR_CRC_RG (0x00000154) > #define MMSS_DP_PSR_CRC_B (0x00000158) > > @@ -184,6 +201,8 @@ > #define MMSS_DP_AUDIO_STREAM_0 (0x00000240) > #define MMSS_DP_AUDIO_STREAM_1 (0x00000244) > > +#define MMSS_DP_SDP_CFG3 (0x0000024c) > + > #define MMSS_DP_EXTENSION_0 (0x00000250) > #define MMSS_DP_EXTENSION_1 (0x00000254) > #define MMSS_DP_EXTENSION_2 (0x00000258) > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h > index ae52412..254fd07 100644 > --- a/drivers/gpu/drm/msm/msm_drv.h > +++ b/drivers/gpu/drm/msm/msm_drv.h > @@ -400,6 +400,8 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_displa > > void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor); > > +void msm_dp_display_set_psr(struct msm_dp *dp, bool enter); > + > #else > static inline int __init msm_dp_register(void) > { > @@ -449,6 +451,10 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display, > { > } > > +static inline void msm_dp_display_set_psr(struct msm_dp *dp, bool enter) > +{ > +} > + > #endif > > void __init msm_mdp_register(void); > -- > 2.7.4 >
Hi, On Mon, Feb 21, 2022 at 7:12 PM Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote: > > > +static int dp_link_psr_status(struct dp_link_private *link) > > +{ > > + u8 status[2]; > > + > > + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); > > + > > + if (status[0] & DP_PSR_LINK_CRC_ERROR) > > + DRM_ERROR("PSR LINK CRC ERROR\n"); > > + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) > > + DRM_ERROR("PSR RFB STORAGE ERROR\n"); > > + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) > > + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); > > + else if (status[1] & DP_PSR_CAPS_CHANGE) > > + DRM_INFO("PSR Capability Change\n"); > > DRM_DEBUG_DP Not sure I'll have time to go back and review the series, but one thing that caught my eye as this flashed through my inbox is that I think all of these "shouting" are deprecated. It's even officially documented now as of commit d2f0a8afc1be ("UPSTREAM: drm/print: Add deprecation notes to DRM_...() functions"). -Doug
On Mon 21 Feb 06:51 PST 2022, Vinod Polimera wrote: > Add support for basic panel self refresh (PSR) feature for eDP. > Add a new interface to set PSR state in the sink from DPU. > Program the eDP controller to issue PSR enter and exit SDP to > the sink. > > Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com> > > Changes in v2: > - Use dp bridge to set psr entry/exit instead of dpu_enocder > - Don't modify whitespaces > - set self refresh aware from atomic_check > - set self refresh aware only if psr is supported > - provide a stub for msm_dp_display_set_psr > --- > drivers/gpu/drm/msm/dp/dp_catalog.c | 81 +++++++++++++++++ > drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + > drivers/gpu/drm/msm/dp/dp_ctrl.c | 63 +++++++++++++ > drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 + > drivers/gpu/drm/msm/dp/dp_display.c | 14 +++ > drivers/gpu/drm/msm/dp/dp_display.h | 1 + > drivers/gpu/drm/msm/dp/dp_drm.c | 177 ++++++++++++++++++++++++++++++++++-- > drivers/gpu/drm/msm/dp/dp_link.c | 22 +++++ > drivers/gpu/drm/msm/dp/dp_panel.c | 21 +++++ > drivers/gpu/drm/msm/dp/dp_panel.h | 6 ++ > drivers/gpu/drm/msm/dp/dp_reg.h | 19 ++++ > drivers/gpu/drm/msm/msm_drv.h | 6 ++ > 12 files changed, 411 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c > index 8a6d3ea..3cd223d 100644 > --- a/drivers/gpu/drm/msm/dp/dp_catalog.c > +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c > @@ -45,6 +45,14 @@ > #define DP_INTERRUPT_STATUS2_MASK \ > (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) > > +#define DP_INTERRUPT_STATUS4 \ Is this group of interrupt bits really called "status4", what is 4? Seems more like the "PSR interrupt status bits" to me. > + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ > + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) > + > +#define DP_INTERRUPT_MASK4 \ > + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ > + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) > + > struct dp_catalog_private { > struct device *dev; > struct dp_io *io; > @@ -343,6 +351,20 @@ void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog) > ln_mapping); > } > > +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, > + bool enable) > +{ > + u32 mainlink_ctrl; > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + > + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); > + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; > + mainlink_ctrl |= (enable & DP_MAINLINK_CTRL_ENABLE); Masking a boolean with constant is different...Please don't do that. if (enable) mainlink_ctrl |= DP_MAINLINK_CTRL_ENABLE; else mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; Is way less magical. Not also, that you don't have to name your "only" local variable "mainline_ctrl", there's no risk for collisions with anything else. Name it "val" or "ctrl". > + > + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); > +} > + > void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, > bool enable) > { > @@ -581,6 +603,51 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) > dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); > } > > +static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) > +{ > + /* trigger sdp */ > + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x1); > + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x0); Can 1 and 0 be defined here? > +} > + > +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog) > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 psr_config; Again, a single local variable. Name it "config". > + > + /* enable PSR1 function */ > + psr_config = dp_read_link(catalog, REG_PSR_CONFIG); > + psr_config |= BIT(0); Add a define for BIT(0) in this register and the code will be self-explanatory, no need for a separate comment to help future readers to guess that BIT(0) enables something... > + dp_write_link(catalog, REG_PSR_CONFIG, psr_config); > + > + dp_write_ahb(catalog, REG_DP_INTR_MASK4, DP_INTERRUPT_MASK4); > + dp_catalog_enable_sdp(catalog); > +} > + > +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter) > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 psr_cmd; "cmd" is sufficient. > + > + psr_cmd = dp_read_link(catalog, REG_PSR_CMD); > + > + /* > + * BIT(0) - send psr entry SDP > + * BIT(1) - sned psr exit SDP > + */ > + psr_cmd &= ~(BIT(0) | BIT(1)); > + > + if (enter) > + psr_cmd |= BIT(0); > + else > + psr_cmd |= BIT(1); As above, defines for BIT(0) and BIT(1), and drop the comment, please. > + > + dp_catalog_enable_sdp(catalog); > + dp_write_link(catalog, REG_PSR_CMD, psr_cmd); > +} > + > u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) > { > struct dp_catalog_private *catalog = container_of(dp_catalog, > @@ -608,6 +675,20 @@ u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) > return isr; > } > > +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog) "Getting an interrupt" is something we do with e.g. platform_get_irq(). dp_catalog_ctrl_read_psr_interrupt_status() would better represent the purpose of this function. > +{ > + struct dp_catalog_private *catalog = container_of(dp_catalog, > + struct dp_catalog_private, dp_catalog); > + u32 intr, intr_ack; > + > + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS4); > + intr_ack = (intr & DP_INTERRUPT_STATUS4) > + << DP_INTERRUPT_STATUS_ACK_SHIFT; > + dp_write_ahb(catalog, REG_DP_INTR_STATUS4, intr_ack); > + > + return intr; > +} > + > int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) > { > struct dp_catalog_private *catalog = container_of(dp_catalog, > diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h > index 6965afa..9b1b199 100644 > --- a/drivers/gpu/drm/msm/dp/dp_catalog.h > +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h > @@ -91,6 +91,7 @@ void dp_catalog_ctrl_state_ctrl(struct dp_catalog *dp_catalog, u32 state); > void dp_catalog_ctrl_config_ctrl(struct dp_catalog *dp_catalog, u32 config); > void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable); > +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, bool enable); > void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb); > void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, > u32 stream_rate_khz, bool fixed_nvid); > @@ -101,12 +102,15 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); > void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, > u32 intr_mask, bool en); > void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); > +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); > +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); > u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); > u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); > int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, > u8 p_level); > int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); > +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog); > void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, > u32 dp_tu, u32 valid_boundary, > u32 valid_boundary2); > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c > index 88ca6c3..ba828ea 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c > @@ -21,6 +21,7 @@ > > #define DP_KHZ_TO_HZ 1000 > #define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */ > +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / 1000) /* 300 ms */ > #define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) > > #define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) > @@ -78,6 +79,7 @@ struct dp_ctrl_private { > struct dp_catalog *catalog; > > struct completion idle_comp; > + struct completion psr_op_comp; > struct completion video_comp; > }; > > @@ -151,6 +153,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) > config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; > config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; > > + if (ctrl->panel->psr_cap.version) > + config |= DP_CONFIGURATION_CTRL_SEND_VSC; > + > dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); > } > > @@ -1365,6 +1370,52 @@ static int dp_ctrl_enable_stream_clocks(struct dp_ctrl_private *ctrl) > return ret; > } > > +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl) > +{ > + struct dp_ctrl_private *ctrl; > + u8 psr_config; "config" - or "cfg' per the register name. > + > + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); Join this with the declaration of ctrl. > + > + if (!ctrl->panel->psr_cap.version) > + return; > + > + dp_catalog_ctrl_config_psr(ctrl->catalog); > + > + psr_config = DP_PSR_ENABLE; > + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &psr_config, 1); > +} > + > +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter) > +{ > + struct dp_ctrl_private *ctrl; > + > + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); As above, please join this with the previous line. > + > + if (!ctrl->panel->psr_cap.version) > + return; > + > + if (enter) { > + reinit_completion(&ctrl->psr_op_comp); > + dp_catalog_ctrl_set_psr(ctrl->catalog, true); > + > + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, > + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { > + DRM_ERROR("PSR_ENTRY timedout\n"); > + dp_catalog_ctrl_set_psr(ctrl->catalog, false); > + return; > + } > + > + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); > + > + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, false); So to enter psr we disable psr_mainline... > + } else { > + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, true); and to exit psr we enable psr_mainline? I certainly would not mind having a comment above this section describing how this is supposed to work. > + > + dp_catalog_ctrl_set_psr(ctrl->catalog, false); > + } > +} > + > int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) > { > struct dp_ctrl_private *ctrl; > @@ -1964,6 +2015,17 @@ void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) > > ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > > + if (ctrl->panel->psr_cap.version) { > + isr = dp_catalog_ctrl_get_psr_interrupt(ctrl->catalog); > + > + if (isr == 0x1) > + DRM_DEBUG_DP("PSR frame update done\n"); > + else if (isr == 0x10) Again, the error messages gives a good indication what these bits might be, but please provide defines to make it clearer. > + DRM_DEBUG_DP("PSR exit done\n"); > + > + complete(&ctrl->psr_op_comp); > + } > + > isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); > > if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { > @@ -2010,6 +2072,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, > dev_err(dev, "failed to add DP OPP table\n"); > > init_completion(&ctrl->idle_comp); > + init_completion(&ctrl->psr_op_comp); > init_completion(&ctrl->video_comp); > > /* in parameters */ > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h > index 2363a2d..f623035 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h > @@ -34,4 +34,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, > struct dp_power *power, struct dp_catalog *catalog, > struct dp_parser *parser); > > +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable); > +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl); > + > #endif /* _DP_CTRL_H_ */ > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c > index 5d314e6..c8d02fb 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -347,6 +347,8 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) > > edid = dp->panel->edid; > > + dp->dp_display.psr_supported = !!dp->panel->psr_cap.version; > + > dp->audio_supported = drm_detect_monitor_audio(edid); > dp_panel_handle_sink_request(dp->panel); > > @@ -871,6 +873,10 @@ static int dp_display_post_enable(struct msm_dp *dp_display) > > /* signal the connect event late to synchronize video and display */ > dp_display_handle_plugged_change(dp_display, true); > + > + if (dp_display->psr_supported) > + dp_ctrl_config_psr(dp->ctrl); > + > return 0; > } > > @@ -1037,6 +1043,14 @@ static void dp_display_config_hpd(struct dp_display_private *dp) > enable_irq(dp->irq); > } > > +void msm_dp_display_set_psr(struct msm_dp *dp_display, bool enter) > +{ > + struct dp_display_private *dp; > + > + dp = container_of(dp_display, struct dp_display_private, dp_display); > + dp_ctrl_set_psr(dp->ctrl, enter); > +} > + > static int hpd_event_thread(void *data) > { > struct dp_display_private *dp_priv; > diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h > index e3adcd5..6f512f3 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.h > +++ b/drivers/gpu/drm/msm/dp/dp_display.h > @@ -28,6 +28,7 @@ struct msm_dp { > > u32 max_dp_lanes; > struct dp_audio *dp_audio; > + bool psr_supported; > }; > > int dp_display_set_plugged_cb(struct msm_dp *dp_display, > diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c > index 2436329..d26ca6a 100644 > --- a/drivers/gpu/drm/msm/dp/dp_drm.c > +++ b/drivers/gpu/drm/msm/dp/dp_drm.c > @@ -142,6 +142,35 @@ static enum drm_mode_status edp_connector_mode_valid( > return MODE_OK; > } > > + > + > +static int edp_connector_atomic_check(struct drm_connector *connector, > + struct drm_atomic_state *state) > +{ > + struct msm_dp *dp; > + struct drm_connector_state *conn_state; > + struct drm_crtc_state *crtc_state; > + > + dp = to_dp_connector(connector)->dp_display; > + conn_state = drm_atomic_get_new_connector_state(state, connector); > + if (WARN_ON(!conn_state)) > + return -ENODEV; > + > + conn_state->self_refresh_aware = true; > + > + if (!conn_state->crtc) > + return 0; > + > + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); > + if (!crtc_state) > + return 0; > + > + if (crtc_state->self_refresh_active && !dp->psr_supported) > + return -EINVAL; > + > + return 0; > +} > + > static const struct drm_connector_funcs dp_connector_funcs = { > .detect = dp_connector_detect, > .fill_modes = drm_helper_probe_single_connector_modes, > @@ -151,6 +180,11 @@ static const struct drm_connector_funcs dp_connector_funcs = { > .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > }; > > +static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { > + .get_modes = dp_connector_get_modes, > + .mode_valid = dp_connector_mode_valid, > +}; > + > static const struct drm_connector_funcs edp_connector_funcs = { > .fill_modes = drm_helper_probe_single_connector_modes, > .destroy = drm_connector_cleanup, > @@ -159,12 +193,8 @@ static const struct drm_connector_funcs edp_connector_funcs = { > .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > }; > > -static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { > - .get_modes = dp_connector_get_modes, > - .mode_valid = dp_connector_mode_valid, > -}; > - > static const struct drm_connector_helper_funcs edp_connector_helper_funcs = { > + .atomic_check = edp_connector_atomic_check, > .get_modes = edp_connector_get_modes, > .mode_valid = edp_connector_mode_valid, > }; > @@ -258,6 +288,130 @@ static void dp_bridge_post_disable(struct drm_bridge *drm_bridge) > msm_dp_display_disable(dp_display, drm_bridge->encoder); > } > > +static struct drm_crtc *dp_bridge_get_old_connector_crtc(struct msm_dp *dp, > + struct drm_atomic_state *state) > +{ > + struct drm_encoder *encoder = dp->encoder; > + struct drm_connector *connector; > + struct drm_connector_state *conn_state; > + > + connector = drm_atomic_get_old_connector_for_encoder(state, encoder); > + if (!connector) > + return NULL; > + > + conn_state = drm_atomic_get_old_connector_state(state, connector); > + if (!conn_state) > + return NULL; > + > + return conn_state->crtc; > +} > + > +static struct drm_crtc *dp_bridge_get_new_connector_crtc(struct msm_dp *dp, > + struct drm_atomic_state *state) > +{ > + struct drm_encoder *encoder = dp->encoder; > + struct drm_connector *connector; > + struct drm_connector_state *conn_state; > + > + connector = drm_atomic_get_new_connector_for_encoder(state, encoder); > + if (!connector) > + return NULL; > + > + conn_state = drm_atomic_get_new_connector_state(state, connector); > + if (!conn_state) > + return NULL; > + > + return conn_state->crtc; > +} > + > +static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *old_crtc_state; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_new_connector_crtc(dp_display, old_state); > + if (!crtc) > + return; > + > + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); > + > + /* Exit from self refresh mode */ > + if (old_crtc_state && old_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, false); > + return; > + } > + > + msm_dp_display_enable(dp_display, drm_bridge->encoder); > +} > + > +static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); > + if (!crtc) > + goto out; > + > + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); > + if (!new_crtc_state) > + goto out; > + > + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); > + if (!old_crtc_state) > + goto out; > + > + /* > + * Set self refresh mode if current crtc state is active. > + * If old crtc state is active, exit psr before disabling > + * the controller. Observed sink stuck in self refresh > + * if psr exit is skipped when screen off occurs with > + * sink in psr mode. > + */ > + if (new_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, true); > + return; > + } else if (old_crtc_state->self_refresh_active) { > + msm_dp_display_set_psr(dp_display, false); > + return; > + } > + > +out: > + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder); > +} > + > +static void edp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, > + struct drm_bridge_state *old_bridge_state) > +{ > + struct drm_atomic_state *old_state = old_bridge_state->base.state; > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state = NULL; > + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); > + struct msm_dp *dp_display = dp_bridge->dp_display; > + > + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); > + if (!crtc) > + return; > + > + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); > + if (!new_crtc_state) > + return; > + > + /* Self refresh mode is set in dp_bridge_disable. Skip disable */ > + if (new_crtc_state->self_refresh_active) > + return; > + > + msm_dp_display_disable(dp_display, drm_bridge->encoder); > +} > + > static const struct drm_bridge_funcs dp_bridge_ops = { > .enable = dp_bridge_enable, > .disable = dp_bridge_disable, > @@ -265,6 +419,16 @@ static const struct drm_bridge_funcs dp_bridge_ops = { > .mode_set = dp_bridge_mode_set, > }; > > +static const struct drm_bridge_funcs edp_bridge_ops = { > + .atomic_enable = edp_bridge_atomic_enable, > + .atomic_disable = edp_bridge_atomic_disable, > + .atomic_post_disable = edp_bridge_atomic_post_disable, > + .mode_set = dp_bridge_mode_set, > + .atomic_reset = drm_atomic_helper_bridge_reset, > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > +}; > + > struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, > struct drm_encoder *encoder) > { > @@ -279,7 +443,8 @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_devi > dp_bridge->dp_display = dp_display; > > bridge = &dp_bridge->bridge; > - bridge->funcs = &dp_bridge_ops; > + bridge->funcs = (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) ? > + &edp_bridge_ops : &dp_bridge_ops; > bridge->encoder = encoder; > > rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); > diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c > index d4d31e5..5503c29 100644 > --- a/drivers/gpu/drm/msm/dp/dp_link.c > +++ b/drivers/gpu/drm/msm/dp/dp_link.c > @@ -924,6 +924,26 @@ static int dp_link_process_phy_test_pattern_request( > return 0; > } > > +static int dp_link_psr_status(struct dp_link_private *link) The implementation and caller indicates that this would better return a bool. That said "status" isn't a boolean property, and given that you return true when capabilities changes, perhaps this is dp_link_psr_cap_changed() ? > +{ > + u8 status[2]; > + > + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); > + > + if (status[0] & DP_PSR_LINK_CRC_ERROR) > + DRM_ERROR("PSR LINK CRC ERROR\n"); > + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) > + DRM_ERROR("PSR RFB STORAGE ERROR\n"); > + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) > + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); > + else if (status[1] & DP_PSR_CAPS_CHANGE) > + DRM_INFO("PSR Capability Change\n"); DEBUG instead? > + else > + return 0; > + > + return 1; > +} > + > static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) > { > return link_status[r - DP_LANE0_1_STATUS]; > @@ -1042,6 +1062,8 @@ int dp_link_process_request(struct dp_link *dp_link) > dp_link->sink_request |= DP_TEST_LINK_TRAINING; > } else if (!dp_link_process_phy_test_pattern_request(link)) { > dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; > + } else if (dp_link_psr_status(link)) { > + DRM_INFO("PSR IRQ_HPD received\n"); > } else { > ret = dp_link_process_link_status_update(link); > if (!ret) { > diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c > index 71db10c..e128d73 100644 > --- a/drivers/gpu/drm/msm/dp/dp_panel.c > +++ b/drivers/gpu/drm/msm/dp/dp_panel.c > @@ -19,6 +19,26 @@ struct dp_panel_private { > bool aux_cfg_update_done; > }; > > +static void dp_panel_read_psr_cap(struct dp_panel_private *panel) > +{ > + ssize_t rlen; > + struct dp_panel *dp_panel; > + > + dp_panel = &panel->dp_panel; > + > + /* edp sink */ > + if (dp_panel->dpcd[DP_EDP_CONFIGURATION_CAP]) { > + rlen = drm_dp_dpcd_read(panel->aux, DP_PSR_SUPPORT, > + &dp_panel->psr_cap, 2); > + if (rlen == 2) { sizeof(dp_panel->psr_cap) perhaps? > + DRM_DEBUG_DP("psr version: 0x%x, psr_cap: 0x%x\n", > + dp_panel->psr_cap.version, > + dp_panel->psr_cap.capabilities); > + } else > + DRM_ERROR("failed to read psr info, rlen=%zd\n", rlen); > + } > +} > + > static int dp_panel_read_dpcd(struct dp_panel *dp_panel) > { > int rc = 0; > @@ -104,6 +124,7 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) > } > } > > + dp_panel_read_psr_cap(panel); > end: > return rc; > } > diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h > index 9023e5b..631657a 100644 > --- a/drivers/gpu/drm/msm/dp/dp_panel.h > +++ b/drivers/gpu/drm/msm/dp/dp_panel.h > @@ -34,6 +34,11 @@ struct dp_panel_in { > struct dp_catalog *catalog; > }; > > +struct dp_panel_psr { > + u8 version; > + u8 capabilities; > +}; > + > struct dp_panel { > /* dpcd raw data */ > u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; > @@ -46,6 +51,7 @@ struct dp_panel { > struct edid *edid; > struct drm_connector *connector; > struct dp_display_mode dp_mode; > + struct dp_panel_psr psr_cap; > bool video_test; > > u32 vic; > diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h > index 2686028..7a0b052 100644 > --- a/drivers/gpu/drm/msm/dp/dp_reg.h > +++ b/drivers/gpu/drm/msm/dp/dp_reg.h > @@ -22,6 +22,20 @@ > #define REG_DP_INTR_STATUS2 (0x00000024) > #define REG_DP_INTR_STATUS3 (0x00000028) > > +#define REG_DP_INTR_STATUS4 (0x0000002C) > +#define PSR_UPDATE_INT (0x00000001) > +#define PSR_CAPTURE_INT (0x00000004) > +#define PSR_EXIT_INT (0x00000010) > +#define PSR_UPDATE_ERROR_INT (0x00000040) > +#define PSR_WAKE_ERROR_INT (0x00000100) > + > +#define REG_DP_INTR_MASK4 (0x00000030) > +#define PSR_UPDATE_MASK (0x00000001) > +#define PSR_CAPTURE_MASK (0x00000002) > +#define PSR_EXIT_MASK (0x00000004) > +#define PSR_UPDATE_ERROR_MASK (0x00000008) > +#define PSR_WAKE_ERROR_MASK (0x00000010) > + > #define REG_DP_DP_HPD_CTRL (0x00000000) > #define DP_DP_HPD_CTRL_HPD_EN (0x00000001) > > @@ -164,6 +178,9 @@ > #define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) > #define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) > > +#define REG_PSR_CONFIG (0x00000100) > +#define REG_PSR_CMD (0x00000110) > + > #define MMSS_DP_PSR_CRC_RG (0x00000154) > #define MMSS_DP_PSR_CRC_B (0x00000158) > > @@ -184,6 +201,8 @@ > #define MMSS_DP_AUDIO_STREAM_0 (0x00000240) > #define MMSS_DP_AUDIO_STREAM_1 (0x00000244) > > +#define MMSS_DP_SDP_CFG3 (0x0000024c) > + > #define MMSS_DP_EXTENSION_0 (0x00000250) > #define MMSS_DP_EXTENSION_1 (0x00000254) > #define MMSS_DP_EXTENSION_2 (0x00000258) > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h > index ae52412..254fd07 100644 > --- a/drivers/gpu/drm/msm/msm_drv.h > +++ b/drivers/gpu/drm/msm/msm_drv.h > @@ -400,6 +400,8 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_displa > > void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor); > > +void msm_dp_display_set_psr(struct msm_dp *dp, bool enter); > + > #else > static inline int __init msm_dp_register(void) > { > @@ -449,6 +451,10 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display, > { > } > > +static inline void msm_dp_display_set_psr(struct msm_dp *dp, bool enter) Perhaps I'm missing it, but I don't see that this is called from outside the DP driver. So why does it need to be in msm_drv.h and why do you need a stub? Thanks, Bjorn > +{ > +} > + > #endif > > void __init msm_mdp_register(void); > -- > 2.7.4 >
On 22/02/2022 22:25, Doug Anderson wrote: > Hi, > > On Mon, Feb 21, 2022 at 7:12 PM Dmitry Baryshkov > <dmitry.baryshkov@linaro.org> wrote: >> >>> +static int dp_link_psr_status(struct dp_link_private *link) >>> +{ >>> + u8 status[2]; >>> + >>> + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); >>> + >>> + if (status[0] & DP_PSR_LINK_CRC_ERROR) >>> + DRM_ERROR("PSR LINK CRC ERROR\n"); >>> + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) >>> + DRM_ERROR("PSR RFB STORAGE ERROR\n"); >>> + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) >>> + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); >>> + else if (status[1] & DP_PSR_CAPS_CHANGE) >>> + DRM_INFO("PSR Capability Change\n"); >> >> DRM_DEBUG_DP > > Not sure I'll have time to go back and review the series, but one > thing that caught my eye as this flashed through my inbox is that I > think all of these "shouting" are deprecated. It's even officially > documented now as of commit d2f0a8afc1be ("UPSTREAM: drm/print: Add > deprecation notes to DRM_...() functions"). Agreed. But not the DRM_INFO too.
Hi, On Tue, Feb 22, 2022 at 1:23 PM Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote: > > On 22/02/2022 22:25, Doug Anderson wrote: > > Hi, > > > > On Mon, Feb 21, 2022 at 7:12 PM Dmitry Baryshkov > > <dmitry.baryshkov@linaro.org> wrote: > >> > >>> +static int dp_link_psr_status(struct dp_link_private *link) > >>> +{ > >>> + u8 status[2]; > >>> + > >>> + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); > >>> + > >>> + if (status[0] & DP_PSR_LINK_CRC_ERROR) > >>> + DRM_ERROR("PSR LINK CRC ERROR\n"); > >>> + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) > >>> + DRM_ERROR("PSR RFB STORAGE ERROR\n"); > >>> + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) > >>> + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); > >>> + else if (status[1] & DP_PSR_CAPS_CHANGE) > >>> + DRM_INFO("PSR Capability Change\n"); > >> > >> DRM_DEBUG_DP > > > > Not sure I'll have time to go back and review the series, but one > > thing that caught my eye as this flashed through my inbox is that I > > think all of these "shouting" are deprecated. It's even officially > > documented now as of commit d2f0a8afc1be ("UPSTREAM: drm/print: Add > > deprecation notes to DRM_...() functions"). > > Agreed. But not the DRM_INFO too. You're saying that DRM_INFO _isn't_ deprecated? I was pretty sure that it was, too. If not, can you please submit a patch to `drm_print.h` clarifying since my patch (which folks Acked) marked it as deprecated: +/* NOTE: this is deprecated in favor of pr_info(). */ #define DRM_INFO(fmt, ...) \ _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__) My understanding (also in the description of my patch) was that DRM_INFO() by itself didn't add much so we should just use the standard pr_info(). If pr_info() wasn't to your liking then it was better to do drm_info(drmdev, ...) or drm_info(NULL, ...); -Doug
On 23/02/2022 00:32, Doug Anderson wrote: > Hi, > > On Tue, Feb 22, 2022 at 1:23 PM Dmitry Baryshkov > <dmitry.baryshkov@linaro.org> wrote: >> >> On 22/02/2022 22:25, Doug Anderson wrote: >>> Hi, >>> >>> On Mon, Feb 21, 2022 at 7:12 PM Dmitry Baryshkov >>> <dmitry.baryshkov@linaro.org> wrote: >>>> >>>>> +static int dp_link_psr_status(struct dp_link_private *link) >>>>> +{ >>>>> + u8 status[2]; >>>>> + >>>>> + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); >>>>> + >>>>> + if (status[0] & DP_PSR_LINK_CRC_ERROR) >>>>> + DRM_ERROR("PSR LINK CRC ERROR\n"); >>>>> + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) >>>>> + DRM_ERROR("PSR RFB STORAGE ERROR\n"); >>>>> + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) >>>>> + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); >>>>> + else if (status[1] & DP_PSR_CAPS_CHANGE) >>>>> + DRM_INFO("PSR Capability Change\n"); >>>> >>>> DRM_DEBUG_DP >>> >>> Not sure I'll have time to go back and review the series, but one >>> thing that caught my eye as this flashed through my inbox is that I >>> think all of these "shouting" are deprecated. It's even officially >>> documented now as of commit d2f0a8afc1be ("UPSTREAM: drm/print: Add >>> deprecation notes to DRM_...() functions"). >> >> Agreed. But not the DRM_INFO too. > > You're saying that DRM_INFO _isn't_ deprecated? I was pretty sure that > it was, too. If not, can you please submit a patch to `drm_print.h` > clarifying since my patch (which folks Acked) marked it as deprecated: It is deprecated > My understanding (also in the description of my patch) was that > DRM_INFO() by itself didn't add much so we should just use the > standard pr_info(). If pr_info() wasn't to your liking then it was > better to do drm_info(drmdev, ...) or drm_info(NULL, ...); I don't think we should get this message at all, unless debugging is enabled. Thus I asked to change DRM_INFO to DEBUG. Regarding your point, I'm fine with either of them. Hopefully when Kuogee's patches are in, we can use drm_dbg_db w/o any issues.
Hi Dmitry, >On Mon, 21 Feb 2022 at 17:52, Vinod Polimera <quic_vpolimer@quicinc.com> >wrote: >> >> Add support for basic panel self refresh (PSR) feature for eDP. >> Add a new interface to set PSR state in the sink from DPU. >> Program the eDP controller to issue PSR enter and exit SDP to the >> sink. >> >> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com> >> >> Changes in v2: >> - Use dp bridge to set psr entry/exit instead of dpu_enocder >> - Don't modify whitespaces >> - set self refresh aware from atomic_check >> - set self refresh aware only if psr is supported >> - provide a stub for msm_dp_display_set_psr >> --- >> drivers/gpu/drm/msm/dp/dp_catalog.c | 81 +++++++++++++++++ >> drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + >> drivers/gpu/drm/msm/dp/dp_ctrl.c | 63 +++++++++++++ >> drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 + >> drivers/gpu/drm/msm/dp/dp_display.c | 14 +++ >> drivers/gpu/drm/msm/dp/dp_display.h | 1 + >> drivers/gpu/drm/msm/dp/dp_drm.c | 177 >++++++++++++++++++++++++++++++++++-- >> drivers/gpu/drm/msm/dp/dp_link.c | 22 +++++ >> drivers/gpu/drm/msm/dp/dp_panel.c | 21 +++++ >> drivers/gpu/drm/msm/dp/dp_panel.h | 6 ++ >> drivers/gpu/drm/msm/dp/dp_reg.h | 19 ++++ >> drivers/gpu/drm/msm/msm_drv.h | 6 ++ >> 12 files changed, 411 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c >> b/drivers/gpu/drm/msm/dp/dp_catalog.c >> index 8a6d3ea..3cd223d 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_catalog.c >> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c >> @@ -45,6 +45,14 @@ >> #define DP_INTERRUPT_STATUS2_MASK \ >> (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) >> >> +#define DP_INTERRUPT_STATUS4 \ >> + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ >> + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) >> + >> +#define DP_INTERRUPT_MASK4 \ >> + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ >> + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) >> + >> struct dp_catalog_private { >> struct device *dev; >> struct dp_io *io; >> @@ -343,6 +351,20 @@ void dp_catalog_ctrl_lane_mapping(struct >dp_catalog *dp_catalog) >> ln_mapping); >> } >> >> +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, >> + bool enable) { >> + u32 mainlink_ctrl; >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, >> +dp_catalog); >> + >> + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); >> + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; >> + mainlink_ctrl |= (enable & DP_MAINLINK_CTRL_ENABLE); >> + >> + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); } >> + >> void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, >> bool enable) { @@ >> -581,6 +603,51 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog >*dp_catalog) >> dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, >> DP_DP_HPD_CTRL_HPD_EN); } >> >> +static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) >> +{ >> + /* trigger sdp */ >> + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x1); >> + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x0); } >> + >> +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog) { >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 psr_config; >> + >> + /* enable PSR1 function */ >> + psr_config = dp_read_link(catalog, REG_PSR_CONFIG); >> + psr_config |= BIT(0); >> + dp_write_link(catalog, REG_PSR_CONFIG, psr_config); >> + >> + dp_write_ahb(catalog, REG_DP_INTR_MASK4, >DP_INTERRUPT_MASK4); >> + dp_catalog_enable_sdp(catalog); } >> + >> +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool >> +enter) { >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 psr_cmd; >> + >> + psr_cmd = dp_read_link(catalog, REG_PSR_CMD); >> + >> + /* >> + * BIT(0) - send psr entry SDP >> + * BIT(1) - sned psr exit SDP >> + */ >> + psr_cmd &= ~(BIT(0) | BIT(1)); >> + >> + if (enter) >> + psr_cmd |= BIT(0); >> + else >> + psr_cmd |= BIT(1); >> + >> + dp_catalog_enable_sdp(catalog); >> + dp_write_link(catalog, REG_PSR_CMD, psr_cmd); } >> + >> u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) { >> struct dp_catalog_private *catalog = container_of(dp_catalog, >> @@ -608,6 +675,20 @@ u32 dp_catalog_hpd_get_intr_status(struct >dp_catalog *dp_catalog) >> return isr; >> } >> >> +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog) >> +{ >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 intr, intr_ack; >> + >> + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS4); >> + intr_ack = (intr & DP_INTERRUPT_STATUS4) >> + << DP_INTERRUPT_STATUS_ACK_SHIFT; >> + dp_write_ahb(catalog, REG_DP_INTR_STATUS4, intr_ack); >> + >> + return intr; >> +} >> + >> int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) { >> struct dp_catalog_private *catalog = container_of(dp_catalog, >> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h >> b/drivers/gpu/drm/msm/dp/dp_catalog.h >> index 6965afa..9b1b199 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_catalog.h >> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h >> @@ -91,6 +91,7 @@ void dp_catalog_ctrl_state_ctrl(struct dp_catalog >> *dp_catalog, u32 state); void dp_catalog_ctrl_config_ctrl(struct >> dp_catalog *dp_catalog, u32 config); void >> dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); void >> dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool >> enable); >> +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog >> +*dp_catalog, bool enable); >> void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 >> cc, u32 tb); void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, >u32 rate, >> u32 stream_rate_khz, bool fixed_nvid); >> @@ -101,12 +102,15 @@ void dp_catalog_ctrl_enable_irq(struct >> dp_catalog *dp_catalog, bool enable); void >dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, >> u32 intr_mask, bool en); void >> dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); >> +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); void >> +dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); >> u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); >> u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); >> void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int >> dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, >> u8 p_level); int >> dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); >> +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog); >> void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, >> u32 dp_tu, u32 valid_boundary, >> u32 valid_boundary2); diff --git >> a/drivers/gpu/drm/msm/dp/dp_ctrl.c >b/drivers/gpu/drm/msm/dp/dp_ctrl.c >> index 88ca6c3..ba828ea 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c >> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c >> @@ -21,6 +21,7 @@ >> >> #define DP_KHZ_TO_HZ 1000 >> #define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / >1000) /* 30 ms */ >> +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / >1000) /* 300 ms */ >> #define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) >> >> #define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) >> @@ -78,6 +79,7 @@ struct dp_ctrl_private { >> struct dp_catalog *catalog; >> >> struct completion idle_comp; >> + struct completion psr_op_comp; >> struct completion video_comp; >> }; >> >> @@ -151,6 +153,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private >*ctrl) >> config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; >> config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; >> >> + if (ctrl->panel->psr_cap.version) >> + config |= DP_CONFIGURATION_CTRL_SEND_VSC; >> + >> dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); } >> >> @@ -1365,6 +1370,52 @@ static int dp_ctrl_enable_stream_clocks(struct >dp_ctrl_private *ctrl) >> return ret; >> } >> >> +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl) { >> + struct dp_ctrl_private *ctrl; >> + u8 psr_config; >> + >> + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); >> + >> + if (!ctrl->panel->psr_cap.version) >> + return; >> + >> + dp_catalog_ctrl_config_psr(ctrl->catalog); >> + >> + psr_config = DP_PSR_ENABLE; >> + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &psr_config, 1); } >> + >> +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter) { >> + struct dp_ctrl_private *ctrl; >> + >> + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); >> + >> + if (!ctrl->panel->psr_cap.version) >> + return; >> + >> + if (enter) { >> + reinit_completion(&ctrl->psr_op_comp); >> + dp_catalog_ctrl_set_psr(ctrl->catalog, true); >> + >> + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, >> + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { >> + DRM_ERROR("PSR_ENTRY timedout\n"); >> + dp_catalog_ctrl_set_psr(ctrl->catalog, false); >> + return; >> + } >> + >> + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); >> + >> + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, false); >> + } else { >> + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, >> + true); >> + >> + dp_catalog_ctrl_set_psr(ctrl->catalog, false); >> + } >> +} >> + >> int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) >> { >> struct dp_ctrl_private *ctrl; >> @@ -1964,6 +2015,17 @@ void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) >> >> ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); >> >> + if (ctrl->panel->psr_cap.version) { >> + isr = >> + dp_catalog_ctrl_get_psr_interrupt(ctrl->catalog); >> + >> + if (isr == 0x1) >> + DRM_DEBUG_DP("PSR frame update done\n"); >> + else if (isr == 0x10) >> + DRM_DEBUG_DP("PSR exit done\n"); >> + >> + complete(&ctrl->psr_op_comp); >> + } >> + >> isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); >> >> if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { @@ -2010,6 +2072,7 >> @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, >> dev_err(dev, "failed to add DP OPP table\n"); >> >> init_completion(&ctrl->idle_comp); >> + init_completion(&ctrl->psr_op_comp); >> init_completion(&ctrl->video_comp); >> >> /* in parameters */ >> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h >> b/drivers/gpu/drm/msm/dp/dp_ctrl.h >> index 2363a2d..f623035 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h >> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h >> @@ -34,4 +34,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct >dp_link *link, >> struct dp_power *power, struct dp_catalog *catalog, >> struct dp_parser *parser); >> >> +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable); void >> +dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl); >> + >> #endif /* _DP_CTRL_H_ */ >> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c >> b/drivers/gpu/drm/msm/dp/dp_display.c >> index 5d314e6..c8d02fb 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_display.c >> +++ b/drivers/gpu/drm/msm/dp/dp_display.c >> @@ -347,6 +347,8 @@ static int dp_display_process_hpd_high(struct >> dp_display_private *dp) >> >> edid = dp->panel->edid; >> >> + dp->dp_display.psr_supported = !!dp->panel->psr_cap.version; >> + >> dp->audio_supported = drm_detect_monitor_audio(edid); >> dp_panel_handle_sink_request(dp->panel); >> >> @@ -871,6 +873,10 @@ static int dp_display_post_enable(struct msm_dp >> *dp_display) >> >> /* signal the connect event late to synchronize video and display */ >> dp_display_handle_plugged_change(dp_display, true); >> + >> + if (dp_display->psr_supported) >> + dp_ctrl_config_psr(dp->ctrl); >> + >> return 0; >> } >> >> @@ -1037,6 +1043,14 @@ static void dp_display_config_hpd(struct >dp_display_private *dp) >> enable_irq(dp->irq); >> } >> >> +void msm_dp_display_set_psr(struct msm_dp *dp_display, bool enter) > >If this function is used only by the dp code, there is no need to pollute the >msm_dp_* namespace. >Please rename to dp_display_set_psr() and remove declaration from >msm_drv.h. > Okay. Will change it. >> +{ >> + struct dp_display_private *dp; >> + >> + dp = container_of(dp_display, struct dp_display_private, dp_display); >> + dp_ctrl_set_psr(dp->ctrl, enter); } >> + >> static int hpd_event_thread(void *data) { >> struct dp_display_private *dp_priv; diff --git >> a/drivers/gpu/drm/msm/dp/dp_display.h >> b/drivers/gpu/drm/msm/dp/dp_display.h >> index e3adcd5..6f512f3 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_display.h >> +++ b/drivers/gpu/drm/msm/dp/dp_display.h >> @@ -28,6 +28,7 @@ struct msm_dp { >> >> u32 max_dp_lanes; >> struct dp_audio *dp_audio; >> + bool psr_supported; >> }; >> >> int dp_display_set_plugged_cb(struct msm_dp *dp_display, diff --git >> a/drivers/gpu/drm/msm/dp/dp_drm.c >b/drivers/gpu/drm/msm/dp/dp_drm.c >> index 2436329..d26ca6a 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_drm.c >> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c >> @@ -142,6 +142,35 @@ static enum drm_mode_status >edp_connector_mode_valid( >> return MODE_OK; >> } >> >> + >> + > >Extra empty lines. > Will remove it >> +static int edp_connector_atomic_check(struct drm_connector *connector, >> + struct drm_atomic_state *state) { >> + struct msm_dp *dp; >> + struct drm_connector_state *conn_state; >> + struct drm_crtc_state *crtc_state; >> + >> + dp = to_dp_connector(connector)->dp_display; >> + conn_state = drm_atomic_get_new_connector_state(state, >connector); >> + if (WARN_ON(!conn_state)) >> + return -ENODEV; >> + >> + conn_state->self_refresh_aware = true; > >I see that analogix bridge does the same. However I think it would be better >to set self_refresh_aware to true only if the actual attached panel supports >PSR. > Okay. Will add that check. >> + >> + if (!conn_state->crtc) >> + return 0; >> + >> + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state- >>crtc); >> + if (!crtc_state) >> + return 0; >> + >> + if (crtc_state->self_refresh_active && !dp->psr_supported) >> + return -EINVAL; >> + >> + return 0; >> +} >> + >> static const struct drm_connector_funcs dp_connector_funcs = { >> .detect = dp_connector_detect, >> .fill_modes = drm_helper_probe_single_connector_modes, >> @@ -151,6 +180,11 @@ static const struct drm_connector_funcs >dp_connector_funcs = { >> .atomic_destroy_state = >> drm_atomic_helper_connector_destroy_state, >> }; >> >> +static const struct drm_connector_helper_funcs >dp_connector_helper_funcs = { >> + .get_modes = dp_connector_get_modes, >> + .mode_valid = dp_connector_mode_valid, }; >> + > >Unnecessary movement. > This will be removed. >> static const struct drm_connector_funcs edp_connector_funcs = { >> .fill_modes = drm_helper_probe_single_connector_modes, >> .destroy = drm_connector_cleanup, @@ -159,12 +193,8 @@ static >> const struct drm_connector_funcs edp_connector_funcs = { >> .atomic_destroy_state = >> drm_atomic_helper_connector_destroy_state, >> }; >> >> -static const struct drm_connector_helper_funcs >dp_connector_helper_funcs = { >> - .get_modes = dp_connector_get_modes, >> - .mode_valid = dp_connector_mode_valid, >> -}; >> - >> static const struct drm_connector_helper_funcs >> edp_connector_helper_funcs = { >> + .atomic_check = edp_connector_atomic_check, >> .get_modes = edp_connector_get_modes, >> .mode_valid = edp_connector_mode_valid, }; @@ -258,6 +288,130 >> @@ static void dp_bridge_post_disable(struct drm_bridge *drm_bridge) >> msm_dp_display_disable(dp_display, drm_bridge->encoder); } >> >> +static struct drm_crtc *dp_bridge_get_old_connector_crtc(struct msm_dp >*dp, >> + struct drm_atomic_state >> +*state) { >> + struct drm_encoder *encoder = dp->encoder; >> + struct drm_connector *connector; >> + struct drm_connector_state *conn_state; >> + >> + connector = drm_atomic_get_old_connector_for_encoder(state, >encoder); >> + if (!connector) >> + return NULL; >> + >> + conn_state = drm_atomic_get_old_connector_state(state, connector); >> + if (!conn_state) >> + return NULL; >> + >> + return conn_state->crtc; >> +} >> + >> +static struct drm_crtc *dp_bridge_get_new_connector_crtc(struct >msm_dp *dp, >> + struct drm_atomic_state >> +*state) { >> + struct drm_encoder *encoder = dp->encoder; >> + struct drm_connector *connector; >> + struct drm_connector_state *conn_state; >> + >> + connector = drm_atomic_get_new_connector_for_encoder(state, >encoder); >> + if (!connector) >> + return NULL; >> + >> + conn_state = drm_atomic_get_new_connector_state(state, >connector); >> + if (!conn_state) >> + return NULL; >> + >> + return conn_state->crtc; >> +} > >This code being repeated over and over again deserves to become a new >atomic helper. >Please move it to drm_atomic.c or .h > It is being done in the same way for the analogix driver also. Moving this logic to a different place will need changes in other chipset drivers also. This needs to be a separate effort. >> + >> +static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *old_crtc_state; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_new_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + return; >> + >> + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, >> + crtc); > >Generic remark to this and the following functions. I don't quite like the idea >of the bridge drivers poking into the crtc state. This looks like a breach of >layering. >The code looks similar to analogix'es one. Maybe we should consider moving it >into common helpers? This would require adding enable/disable_srr as >drm_bridge ops. >Or to introduce drm_bridge_helper_funcs. > This sounds like a good option. Implementing this suggestion will require changes in the drivers of other chipsets and needs to be a separate effort. >> + >> + /* Exit from self refresh mode */ >> + if (old_crtc_state && old_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, false); >> + return; >> + } >> + >> + msm_dp_display_enable(dp_display, drm_bridge->encoder); } >> + >> +static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = >NULL; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + goto out; >> + >> + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); >> + if (!new_crtc_state) >> + goto out; >> + >> + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); >> + if (!old_crtc_state) >> + goto out; >> + >> + /* >> + * Set self refresh mode if current crtc state is active. >> + * If old crtc state is active, exit psr before disabling >> + * the controller. Observed sink stuck in self refresh >> + * if psr exit is skipped when screen off occurs with >> + * sink in psr mode. >> + */ >> + if (new_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, true); >> + return; >> + } else if (old_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, false); >> + return; > >I think the return here is wrong. Where do we support the case when the old >state was the PSR, but the new states tells us to disable the crtc? If I >understand the drm code correctly, it's a legit case. > The edp_bridge_atomic_post_disable will handle it. We have to exit PSR in that case and gracefully turn off the display interface. } else if (old_crtc_state->self_refresh_active) { msm_dp_display_set_psr(dp_display, false); return; The above code will exit PSR in edp_bridge_atomic_disable. The display interface off is done in edp_bridge_atomic_post_disable >> + } >> + >> +out: >> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder); } >> + >> +static void edp_bridge_atomic_post_disable(struct drm_bridge >*drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *new_crtc_state = NULL; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + return; >> + >> + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); >> + if (!new_crtc_state) >> + return; >> + >> + /* Self refresh mode is set in dp_bridge_disable. Skip disable >> + */ > >edp_bridge_atomic_disable? > Yes, will put the correct function in the comment. >> + if (new_crtc_state->self_refresh_active) >> + return; >> + >> + msm_dp_display_disable(dp_display, drm_bridge->encoder); } >> + >> static const struct drm_bridge_funcs dp_bridge_ops = { >> .enable = dp_bridge_enable, >> .disable = dp_bridge_disable, >> @@ -265,6 +419,16 @@ static const struct drm_bridge_funcs >dp_bridge_ops = { >> .mode_set = dp_bridge_mode_set, >> }; >> >> +static const struct drm_bridge_funcs edp_bridge_ops = { >> + .atomic_enable = edp_bridge_atomic_enable, >> + .atomic_disable = edp_bridge_atomic_disable, >> + .atomic_post_disable = edp_bridge_atomic_post_disable, >> + .mode_set = dp_bridge_mode_set, >> + .atomic_reset = drm_atomic_helper_bridge_reset, >> + .atomic_duplicate_state = >drm_atomic_helper_bridge_duplicate_state, >> + .atomic_destroy_state = >> +drm_atomic_helper_bridge_destroy_state, >> +}; >> + >> struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, >struct drm_device *dev, >> struct drm_encoder *encoder) { @@ -279,7 >> +443,8 @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp >*dp_display, struct drm_devi >> dp_bridge->dp_display = dp_display; >> >> bridge = &dp_bridge->bridge; >> - bridge->funcs = &dp_bridge_ops; >> + bridge->funcs = (dp_display->connector_type == >DRM_MODE_CONNECTOR_eDP) ? >> + &edp_bridge_ops : &dp_bridge_ops; >> bridge->encoder = encoder; >> >> rc = drm_bridge_attach(encoder, bridge, NULL, >> DRM_BRIDGE_ATTACH_NO_CONNECTOR); diff --git >> a/drivers/gpu/drm/msm/dp/dp_link.c >b/drivers/gpu/drm/msm/dp/dp_link.c >> index d4d31e5..5503c29 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_link.c >> +++ b/drivers/gpu/drm/msm/dp/dp_link.c >> @@ -924,6 +924,26 @@ static int >dp_link_process_phy_test_pattern_request( >> return 0; >> } >> >> +static int dp_link_psr_status(struct dp_link_private *link) { >> + u8 status[2]; >> + >> + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); >> + >> + if (status[0] & DP_PSR_LINK_CRC_ERROR) >> + DRM_ERROR("PSR LINK CRC ERROR\n"); >> + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) >> + DRM_ERROR("PSR RFB STORAGE ERROR\n"); >> + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) >> + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); >> + else if (status[1] & DP_PSR_CAPS_CHANGE) >> + DRM_INFO("PSR Capability Change\n"); > >DRM_DEBUG_DP > Will change it >> + else >> + return 0; >> + >> + return 1; >> +} >> + >> static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], >> int r) { >> return link_status[r - DP_LANE0_1_STATUS]; @@ -1042,6 +1062,8 >> @@ int dp_link_process_request(struct dp_link *dp_link) >> dp_link->sink_request |= DP_TEST_LINK_TRAINING; >> } else if (!dp_link_process_phy_test_pattern_request(link)) { >> dp_link->sink_request |= >> DP_TEST_LINK_PHY_TEST_PATTERN; >> + } else if (dp_link_psr_status(link)) { >> + DRM_INFO("PSR IRQ_HPD received\n"); > >DRM_DEBUG_DP > Will change it >> } else { >> ret = dp_link_process_link_status_update(link); >> if (!ret) { >> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c >> b/drivers/gpu/drm/msm/dp/dp_panel.c >> index 71db10c..e128d73 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_panel.c >> +++ b/drivers/gpu/drm/msm/dp/dp_panel.c >> @@ -19,6 +19,26 @@ struct dp_panel_private { >> bool aux_cfg_update_done; >> }; >> >> +static void dp_panel_read_psr_cap(struct dp_panel_private *panel) { >> + ssize_t rlen; >> + struct dp_panel *dp_panel; >> + >> + dp_panel = &panel->dp_panel; >> + >> + /* edp sink */ >> + if (dp_panel->dpcd[DP_EDP_CONFIGURATION_CAP]) { >> + rlen = drm_dp_dpcd_read(panel->aux, DP_PSR_SUPPORT, >> + &dp_panel->psr_cap, 2); >> + if (rlen == 2) { >> + DRM_DEBUG_DP("psr version: 0x%x, psr_cap: 0x%x\n", >> + dp_panel->psr_cap.version, >> + dp_panel->psr_cap.capabilities); >> + } else >> + DRM_ERROR("failed to read psr info, rlen=%zd\n", rlen); >> + } >> +} >> + >> static int dp_panel_read_dpcd(struct dp_panel *dp_panel) { >> int rc = 0; >> @@ -104,6 +124,7 @@ static int dp_panel_read_dpcd(struct dp_panel >*dp_panel) >> } >> } >> >> + dp_panel_read_psr_cap(panel); >> end: >> return rc; >> } >> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h >> b/drivers/gpu/drm/msm/dp/dp_panel.h >> index 9023e5b..631657a 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_panel.h >> +++ b/drivers/gpu/drm/msm/dp/dp_panel.h >> @@ -34,6 +34,11 @@ struct dp_panel_in { >> struct dp_catalog *catalog; >> }; >> >> +struct dp_panel_psr { >> + u8 version; >> + u8 capabilities; >> +}; >> + >> struct dp_panel { >> /* dpcd raw data */ >> u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; @@ -46,6 +51,7 @@ struct >> dp_panel { >> struct edid *edid; >> struct drm_connector *connector; >> struct dp_display_mode dp_mode; >> + struct dp_panel_psr psr_cap; >> bool video_test; >> >> u32 vic; >> diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h >> b/drivers/gpu/drm/msm/dp/dp_reg.h index 2686028..7a0b052 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_reg.h >> +++ b/drivers/gpu/drm/msm/dp/dp_reg.h >> @@ -22,6 +22,20 @@ >> #define REG_DP_INTR_STATUS2 (0x00000024) >> #define REG_DP_INTR_STATUS3 (0x00000028) >> >> +#define REG_DP_INTR_STATUS4 (0x0000002C) >> +#define PSR_UPDATE_INT (0x00000001) >> +#define PSR_CAPTURE_INT (0x00000004) >> +#define PSR_EXIT_INT (0x00000010) >> +#define PSR_UPDATE_ERROR_INT (0x00000040) >> +#define PSR_WAKE_ERROR_INT (0x00000100) >> + >> +#define REG_DP_INTR_MASK4 (0x00000030) >> +#define PSR_UPDATE_MASK (0x00000001) >> +#define PSR_CAPTURE_MASK (0x00000002) >> +#define PSR_EXIT_MASK (0x00000004) >> +#define PSR_UPDATE_ERROR_MASK (0x00000008) >> +#define PSR_WAKE_ERROR_MASK (0x00000010) >> + >> #define REG_DP_DP_HPD_CTRL (0x00000000) >> #define DP_DP_HPD_CTRL_HPD_EN (0x00000001) >> >> @@ -164,6 +178,9 @@ >> #define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) >> #define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) >> >> +#define REG_PSR_CONFIG (0x00000100) >> +#define REG_PSR_CMD (0x00000110) >> + >> #define MMSS_DP_PSR_CRC_RG (0x00000154) >> #define MMSS_DP_PSR_CRC_B (0x00000158) >> >> @@ -184,6 +201,8 @@ >> #define MMSS_DP_AUDIO_STREAM_0 (0x00000240) >> #define MMSS_DP_AUDIO_STREAM_1 (0x00000244) >> >> +#define MMSS_DP_SDP_CFG3 (0x0000024c) >> + >> #define MMSS_DP_EXTENSION_0 (0x00000250) >> #define MMSS_DP_EXTENSION_1 (0x00000254) >> #define MMSS_DP_EXTENSION_2 (0x00000258) >> diff --git a/drivers/gpu/drm/msm/msm_drv.h >> b/drivers/gpu/drm/msm/msm_drv.h index ae52412..254fd07 100644 >> --- a/drivers/gpu/drm/msm/msm_drv.h >> +++ b/drivers/gpu/drm/msm/msm_drv.h >> @@ -400,6 +400,8 @@ void msm_dp_snapshot(struct msm_disp_state >> *disp_state, struct msm_dp *dp_displa >> >> void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor >> *minor); >> >> +void msm_dp_display_set_psr(struct msm_dp *dp, bool enter); >> + >> #else >> static inline int __init msm_dp_register(void) { @@ -449,6 +451,10 >> @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display, >> { } >> >> +static inline void msm_dp_display_set_psr(struct msm_dp *dp, bool >> +enter) { } >> + >> #endif >> >> void __init msm_mdp_register(void); >> -- >> 2.7.4 >> > > >-- >With best wishes >Dmitry Thank you, Sankeerth
Hi Bjorn, >> Add support for basic panel self refresh (PSR) feature for eDP. >> Add a new interface to set PSR state in the sink from DPU. >> Program the eDP controller to issue PSR enter and exit SDP to the >> sink. >> >> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com> >> >> Changes in v2: >> - Use dp bridge to set psr entry/exit instead of dpu_enocder >> - Don't modify whitespaces >> - set self refresh aware from atomic_check >> - set self refresh aware only if psr is supported >> - provide a stub for msm_dp_display_set_psr >> --- >> drivers/gpu/drm/msm/dp/dp_catalog.c | 81 +++++++++++++++++ >> drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + >> drivers/gpu/drm/msm/dp/dp_ctrl.c | 63 +++++++++++++ >> drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 + >> drivers/gpu/drm/msm/dp/dp_display.c | 14 +++ >> drivers/gpu/drm/msm/dp/dp_display.h | 1 + >> drivers/gpu/drm/msm/dp/dp_drm.c | 177 >++++++++++++++++++++++++++++++++++-- >> drivers/gpu/drm/msm/dp/dp_link.c | 22 +++++ >> drivers/gpu/drm/msm/dp/dp_panel.c | 21 +++++ >> drivers/gpu/drm/msm/dp/dp_panel.h | 6 ++ >> drivers/gpu/drm/msm/dp/dp_reg.h | 19 ++++ >> drivers/gpu/drm/msm/msm_drv.h | 6 ++ >> 12 files changed, 411 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c >> b/drivers/gpu/drm/msm/dp/dp_catalog.c >> index 8a6d3ea..3cd223d 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_catalog.c >> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c >> @@ -45,6 +45,14 @@ >> #define DP_INTERRUPT_STATUS2_MASK \ >> (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) >> >> +#define DP_INTERRUPT_STATUS4 \ > >Is this group of interrupt bits really called "status4", what is 4? >Seems more like the "PSR interrupt status bits" to me. > The name of the interrupt itself is DP_INTERRUPT_STATUS4 It has PSR status bits. I defined them in dp_reg.h >> + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ >> + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) >> + >> +#define DP_INTERRUPT_MASK4 \ >> + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ >> + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) >> + >> struct dp_catalog_private { >> struct device *dev; >> struct dp_io *io; >> @@ -343,6 +351,20 @@ void dp_catalog_ctrl_lane_mapping(struct >dp_catalog *dp_catalog) >> ln_mapping); >> } >> >> +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, >> + bool enable) { >> + u32 mainlink_ctrl; >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + >> + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); >> + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; >> + mainlink_ctrl |= (enable & DP_MAINLINK_CTRL_ENABLE); > >Masking a boolean with constant is different...Please don't do that. > >if (enable) > mainlink_ctrl |= DP_MAINLINK_CTRL_ENABLE; else > mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; > >Is way less magical. > > >Not also, that you don't have to name your "only" local variable >"mainline_ctrl", there's no risk for collisions with anything else. > >Name it "val" or "ctrl". > Okay. Changed it. >> + >> + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); } >> + >> void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, >> bool enable) { @@ >> -581,6 +603,51 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog >*dp_catalog) >> dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, >> DP_DP_HPD_CTRL_HPD_EN); } >> >> +static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) >> +{ >> + /* trigger sdp */ >> + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x1); >> + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x0); > >Can 1 and 0 be defined here? > Okay >> +} >> + >> +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog) { >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 psr_config; > >Again, a single local variable. Name it "config". > Done >> + >> + /* enable PSR1 function */ >> + psr_config = dp_read_link(catalog, REG_PSR_CONFIG); >> + psr_config |= BIT(0); > >Add a define for BIT(0) in this register and the code will be self-explanatory, >no need for a separate comment to help future readers to guess that BIT(0) >enables something... > Okay >> + dp_write_link(catalog, REG_PSR_CONFIG, psr_config); >> + >> + dp_write_ahb(catalog, REG_DP_INTR_MASK4, >DP_INTERRUPT_MASK4); >> + dp_catalog_enable_sdp(catalog); >> +} >> + >> +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool >> +enter) { >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 psr_cmd; > >"cmd" is sufficient. > Okay >> + >> + psr_cmd = dp_read_link(catalog, REG_PSR_CMD); >> + >> + /* >> + * BIT(0) - send psr entry SDP >> + * BIT(1) - sned psr exit SDP >> + */ >> + psr_cmd &= ~(BIT(0) | BIT(1)); >> + >> + if (enter) >> + psr_cmd |= BIT(0); >> + else >> + psr_cmd |= BIT(1); > >As above, defines for BIT(0) and BIT(1), and drop the comment, please. > Okay. Will do it >> + >> + dp_catalog_enable_sdp(catalog); >> + dp_write_link(catalog, REG_PSR_CMD, psr_cmd); } >> + >> u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) { >> struct dp_catalog_private *catalog = container_of(dp_catalog, @@ >> -608,6 +675,20 @@ u32 dp_catalog_hpd_get_intr_status(struct dp_catalog >*dp_catalog) >> return isr; >> } >> >> +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog) > >"Getting an interrupt" is something we do with e.g. platform_get_irq(). > >dp_catalog_ctrl_read_psr_interrupt_status() would better represent the >purpose of this function. > Will change it >> +{ >> + struct dp_catalog_private *catalog = container_of(dp_catalog, >> + struct dp_catalog_private, dp_catalog); >> + u32 intr, intr_ack; >> + >> + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS4); >> + intr_ack = (intr & DP_INTERRUPT_STATUS4) >> + << DP_INTERRUPT_STATUS_ACK_SHIFT; >> + dp_write_ahb(catalog, REG_DP_INTR_STATUS4, intr_ack); >> + >> + return intr; >> +} >> + >> int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) { >> struct dp_catalog_private *catalog = container_of(dp_catalog, >> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h >> b/drivers/gpu/drm/msm/dp/dp_catalog.h >> index 6965afa..9b1b199 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_catalog.h >> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h >> @@ -91,6 +91,7 @@ void dp_catalog_ctrl_state_ctrl(struct dp_catalog >> *dp_catalog, u32 state); void dp_catalog_ctrl_config_ctrl(struct >> dp_catalog *dp_catalog, u32 config); void >> dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); void >> dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool >> enable); >> +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog >> +*dp_catalog, bool enable); >> void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 >> cc, u32 tb); void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, >u32 rate, >> u32 stream_rate_khz, bool fixed_nvid); >> @@ -101,12 +102,15 @@ void dp_catalog_ctrl_enable_irq(struct >> dp_catalog *dp_catalog, bool enable); void >dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, >> u32 intr_mask, bool en); void >> dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); >> +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); void >> +dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); >> u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); >> u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); >> void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int >> dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, >> u8 p_level); int >> dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); >> +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog); >> void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, >> u32 dp_tu, u32 valid_boundary, >> u32 valid_boundary2); diff --git >> a/drivers/gpu/drm/msm/dp/dp_ctrl.c >b/drivers/gpu/drm/msm/dp/dp_ctrl.c >> index 88ca6c3..ba828ea 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c >> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c >> @@ -21,6 +21,7 @@ >> >> #define DP_KHZ_TO_HZ 1000 >> #define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) >/* 30 ms */ >> +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / >1000) /* 300 ms */ >> #define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) >> >> #define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) >> @@ -78,6 +79,7 @@ struct dp_ctrl_private { >> struct dp_catalog *catalog; >> >> struct completion idle_comp; >> + struct completion psr_op_comp; >> struct completion video_comp; >> }; >> >> @@ -151,6 +153,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private >*ctrl) >> config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; >> config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; >> >> + if (ctrl->panel->psr_cap.version) >> + config |= DP_CONFIGURATION_CTRL_SEND_VSC; >> + >> dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); } >> >> @@ -1365,6 +1370,52 @@ static int dp_ctrl_enable_stream_clocks(struct >dp_ctrl_private *ctrl) >> return ret; >> } >> >> +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl) { >> + struct dp_ctrl_private *ctrl; >> + u8 psr_config; > >"config" - or "cfg' per the register name. > Okay >> + >> + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > >Join this with the declaration of ctrl. > Okay >> + >> + if (!ctrl->panel->psr_cap.version) >> + return; >> + >> + dp_catalog_ctrl_config_psr(ctrl->catalog); >> + >> + psr_config = DP_PSR_ENABLE; >> + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &psr_config, 1); } >> + >> +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter) { >> + struct dp_ctrl_private *ctrl; >> + >> + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); > >As above, please join this with the previous line. > Done >> + >> + if (!ctrl->panel->psr_cap.version) >> + return; >> + >> + if (enter) { >> + reinit_completion(&ctrl->psr_op_comp); >> + dp_catalog_ctrl_set_psr(ctrl->catalog, true); >> + >> + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, >> + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { >> + DRM_ERROR("PSR_ENTRY timedout\n"); >> + dp_catalog_ctrl_set_psr(ctrl->catalog, false); >> + return; >> + } >> + >> + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); >> + >> + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, >> + false); > >So to enter psr we disable psr_mainline... > >> + } else { >> + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, >> + true); > >and to exit psr we enable psr_mainline? > >I certainly would not mind having a comment above this section describing >how this is supposed to work. > Added the comments in the new version >> + >> + dp_catalog_ctrl_set_psr(ctrl->catalog, false); >> + } >> +} >> + >> int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) >> { >> struct dp_ctrl_private *ctrl; >> @@ -1964,6 +2015,17 @@ void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) >> >> ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); >> >> + if (ctrl->panel->psr_cap.version) { >> + isr = dp_catalog_ctrl_get_psr_interrupt(ctrl->catalog); >> + >> + if (isr == 0x1) >> + DRM_DEBUG_DP("PSR frame update done\n"); >> + else if (isr == 0x10) > >Again, the error messages gives a good indication what these bits might be, >but please provide defines to make it clearer. > Okay >> + DRM_DEBUG_DP("PSR exit done\n"); >> + >> + complete(&ctrl->psr_op_comp); >> + } >> + >> isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); >> >> if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { @@ -2010,6 +2072,7 @@ >> struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, >> dev_err(dev, "failed to add DP OPP table\n"); >> >> init_completion(&ctrl->idle_comp); >> + init_completion(&ctrl->psr_op_comp); >> init_completion(&ctrl->video_comp); >> >> /* in parameters */ >> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h >> b/drivers/gpu/drm/msm/dp/dp_ctrl.h >> index 2363a2d..f623035 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h >> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h >> @@ -34,4 +34,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct >dp_link *link, >> struct dp_power *power, struct dp_catalog *catalog, >> struct dp_parser *parser); >> >> +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable); void >> +dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl); >> + >> #endif /* _DP_CTRL_H_ */ >> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c >> b/drivers/gpu/drm/msm/dp/dp_display.c >> index 5d314e6..c8d02fb 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_display.c >> +++ b/drivers/gpu/drm/msm/dp/dp_display.c >> @@ -347,6 +347,8 @@ static int dp_display_process_hpd_high(struct >> dp_display_private *dp) >> >> edid = dp->panel->edid; >> >> + dp->dp_display.psr_supported = !!dp->panel->psr_cap.version; >> + >> dp->audio_supported = drm_detect_monitor_audio(edid); >> dp_panel_handle_sink_request(dp->panel); >> >> @@ -871,6 +873,10 @@ static int dp_display_post_enable(struct msm_dp >> *dp_display) >> >> /* signal the connect event late to synchronize video and display */ >> dp_display_handle_plugged_change(dp_display, true); >> + >> + if (dp_display->psr_supported) >> + dp_ctrl_config_psr(dp->ctrl); >> + >> return 0; >> } >> >> @@ -1037,6 +1043,14 @@ static void dp_display_config_hpd(struct >dp_display_private *dp) >> enable_irq(dp->irq); >> } >> >> +void msm_dp_display_set_psr(struct msm_dp *dp_display, bool enter) { >> + struct dp_display_private *dp; >> + >> + dp = container_of(dp_display, struct dp_display_private, dp_display); >> + dp_ctrl_set_psr(dp->ctrl, enter); } >> + >> static int hpd_event_thread(void *data) { >> struct dp_display_private *dp_priv; diff --git >> a/drivers/gpu/drm/msm/dp/dp_display.h >> b/drivers/gpu/drm/msm/dp/dp_display.h >> index e3adcd5..6f512f3 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_display.h >> +++ b/drivers/gpu/drm/msm/dp/dp_display.h >> @@ -28,6 +28,7 @@ struct msm_dp { >> >> u32 max_dp_lanes; >> struct dp_audio *dp_audio; >> + bool psr_supported; >> }; >> >> int dp_display_set_plugged_cb(struct msm_dp *dp_display, diff --git >> a/drivers/gpu/drm/msm/dp/dp_drm.c >b/drivers/gpu/drm/msm/dp/dp_drm.c >> index 2436329..d26ca6a 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_drm.c >> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c >> @@ -142,6 +142,35 @@ static enum drm_mode_status >edp_connector_mode_valid( >> return MODE_OK; >> } >> >> + >> + >> +static int edp_connector_atomic_check(struct drm_connector *connector, >> + struct drm_atomic_state *state) { >> + struct msm_dp *dp; >> + struct drm_connector_state *conn_state; >> + struct drm_crtc_state *crtc_state; >> + >> + dp = to_dp_connector(connector)->dp_display; >> + conn_state = drm_atomic_get_new_connector_state(state, >connector); >> + if (WARN_ON(!conn_state)) >> + return -ENODEV; >> + >> + conn_state->self_refresh_aware = true; >> + >> + if (!conn_state->crtc) >> + return 0; >> + >> + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); >> + if (!crtc_state) >> + return 0; >> + >> + if (crtc_state->self_refresh_active && !dp->psr_supported) >> + return -EINVAL; >> + >> + return 0; >> +} >> + >> static const struct drm_connector_funcs dp_connector_funcs = { >> .detect = dp_connector_detect, >> .fill_modes = drm_helper_probe_single_connector_modes, >> @@ -151,6 +180,11 @@ static const struct drm_connector_funcs >dp_connector_funcs = { >> .atomic_destroy_state = >> drm_atomic_helper_connector_destroy_state, >> }; >> >> +static const struct drm_connector_helper_funcs >dp_connector_helper_funcs = { >> + .get_modes = dp_connector_get_modes, >> + .mode_valid = dp_connector_mode_valid, }; >> + >> static const struct drm_connector_funcs edp_connector_funcs = { >> .fill_modes = drm_helper_probe_single_connector_modes, >> .destroy = drm_connector_cleanup, @@ -159,12 +193,8 @@ static >> const struct drm_connector_funcs edp_connector_funcs = { >> .atomic_destroy_state = >> drm_atomic_helper_connector_destroy_state, >> }; >> >> -static const struct drm_connector_helper_funcs >dp_connector_helper_funcs = { >> - .get_modes = dp_connector_get_modes, >> - .mode_valid = dp_connector_mode_valid, >> -}; >> - >> static const struct drm_connector_helper_funcs >> edp_connector_helper_funcs = { >> + .atomic_check = edp_connector_atomic_check, >> .get_modes = edp_connector_get_modes, >> .mode_valid = edp_connector_mode_valid, }; @@ -258,6 +288,130 >> @@ static void dp_bridge_post_disable(struct drm_bridge *drm_bridge) >> msm_dp_display_disable(dp_display, drm_bridge->encoder); } >> >> +static struct drm_crtc *dp_bridge_get_old_connector_crtc(struct msm_dp >*dp, >> + struct drm_atomic_state >> +*state) { >> + struct drm_encoder *encoder = dp->encoder; >> + struct drm_connector *connector; >> + struct drm_connector_state *conn_state; >> + >> + connector = drm_atomic_get_old_connector_for_encoder(state, >encoder); >> + if (!connector) >> + return NULL; >> + >> + conn_state = drm_atomic_get_old_connector_state(state, connector); >> + if (!conn_state) >> + return NULL; >> + >> + return conn_state->crtc; >> +} >> + >> +static struct drm_crtc *dp_bridge_get_new_connector_crtc(struct >msm_dp *dp, >> + struct drm_atomic_state >> +*state) { >> + struct drm_encoder *encoder = dp->encoder; >> + struct drm_connector *connector; >> + struct drm_connector_state *conn_state; >> + >> + connector = drm_atomic_get_new_connector_for_encoder(state, >encoder); >> + if (!connector) >> + return NULL; >> + >> + conn_state = drm_atomic_get_new_connector_state(state, >connector); >> + if (!conn_state) >> + return NULL; >> + >> + return conn_state->crtc; >> +} >> + >> +static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *old_crtc_state; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_new_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + return; >> + >> + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); >> + >> + /* Exit from self refresh mode */ >> + if (old_crtc_state && old_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, false); >> + return; >> + } >> + >> + msm_dp_display_enable(dp_display, drm_bridge->encoder); } >> + >> +static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + goto out; >> + >> + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); >> + if (!new_crtc_state) >> + goto out; >> + >> + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); >> + if (!old_crtc_state) >> + goto out; >> + >> + /* >> + * Set self refresh mode if current crtc state is active. >> + * If old crtc state is active, exit psr before disabling >> + * the controller. Observed sink stuck in self refresh >> + * if psr exit is skipped when screen off occurs with >> + * sink in psr mode. >> + */ >> + if (new_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, true); >> + return; >> + } else if (old_crtc_state->self_refresh_active) { >> + msm_dp_display_set_psr(dp_display, false); >> + return; >> + } >> + >> +out: >> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder); } >> + >> +static void edp_bridge_atomic_post_disable(struct drm_bridge >*drm_bridge, >> + struct drm_bridge_state >> +*old_bridge_state) { >> + struct drm_atomic_state *old_state = old_bridge_state->base.state; >> + struct drm_crtc *crtc; >> + struct drm_crtc_state *new_crtc_state = NULL; >> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); >> + struct msm_dp *dp_display = dp_bridge->dp_display; >> + >> + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); >> + if (!crtc) >> + return; >> + >> + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); >> + if (!new_crtc_state) >> + return; >> + >> + /* Self refresh mode is set in dp_bridge_disable. Skip disable */ >> + if (new_crtc_state->self_refresh_active) >> + return; >> + >> + msm_dp_display_disable(dp_display, drm_bridge->encoder); } >> + >> static const struct drm_bridge_funcs dp_bridge_ops = { >> .enable = dp_bridge_enable, >> .disable = dp_bridge_disable, >> @@ -265,6 +419,16 @@ static const struct drm_bridge_funcs >dp_bridge_ops = { >> .mode_set = dp_bridge_mode_set, >> }; >> >> +static const struct drm_bridge_funcs edp_bridge_ops = { >> + .atomic_enable = edp_bridge_atomic_enable, >> + .atomic_disable = edp_bridge_atomic_disable, >> + .atomic_post_disable = edp_bridge_atomic_post_disable, >> + .mode_set = dp_bridge_mode_set, >> + .atomic_reset = drm_atomic_helper_bridge_reset, >> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, >> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, >> +}; >> + >> struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, >struct drm_device *dev, >> struct drm_encoder *encoder) { @@ -279,7 +443,8 >> @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, >struct drm_devi >> dp_bridge->dp_display = dp_display; >> >> bridge = &dp_bridge->bridge; >> - bridge->funcs = &dp_bridge_ops; >> + bridge->funcs = (dp_display->connector_type == >DRM_MODE_CONNECTOR_eDP) ? >> + &edp_bridge_ops : &dp_bridge_ops; >> bridge->encoder = encoder; >> >> rc = drm_bridge_attach(encoder, bridge, NULL, >> DRM_BRIDGE_ATTACH_NO_CONNECTOR); diff --git >> a/drivers/gpu/drm/msm/dp/dp_link.c >b/drivers/gpu/drm/msm/dp/dp_link.c >> index d4d31e5..5503c29 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_link.c >> +++ b/drivers/gpu/drm/msm/dp/dp_link.c >> @@ -924,6 +924,26 @@ static int >dp_link_process_phy_test_pattern_request( >> return 0; >> } >> >> +static int dp_link_psr_status(struct dp_link_private *link) > >The implementation and caller indicates that this would better return a bool. >That said "status" isn't a boolean property, and given that you return true >when capabilities changes, perhaps this is >dp_link_psr_cap_changed() ? > Okay. I split the function into two. >> +{ >> + u8 status[2]; >> + >> + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); >> + >> + if (status[0] & DP_PSR_LINK_CRC_ERROR) >> + DRM_ERROR("PSR LINK CRC ERROR\n"); >> + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) >> + DRM_ERROR("PSR RFB STORAGE ERROR\n"); >> + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) >> + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); >> + else if (status[1] & DP_PSR_CAPS_CHANGE) >> + DRM_INFO("PSR Capability Change\n"); > >DEBUG instead? > Okay >> + else >> + return 0; >> + >> + return 1; >> +} >> + >> static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], >> int r) { >> return link_status[r - DP_LANE0_1_STATUS]; @@ -1042,6 +1062,8 @@ >> int dp_link_process_request(struct dp_link *dp_link) >> dp_link->sink_request |= DP_TEST_LINK_TRAINING; >> } else if (!dp_link_process_phy_test_pattern_request(link)) { >> dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; >> + } else if (dp_link_psr_status(link)) { >> + DRM_INFO("PSR IRQ_HPD received\n"); >> } else { >> ret = dp_link_process_link_status_update(link); >> if (!ret) { >> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c >> b/drivers/gpu/drm/msm/dp/dp_panel.c >> index 71db10c..e128d73 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_panel.c >> +++ b/drivers/gpu/drm/msm/dp/dp_panel.c >> @@ -19,6 +19,26 @@ struct dp_panel_private { >> bool aux_cfg_update_done; >> }; >> >> +static void dp_panel_read_psr_cap(struct dp_panel_private *panel) { >> + ssize_t rlen; >> + struct dp_panel *dp_panel; >> + >> + dp_panel = &panel->dp_panel; >> + >> + /* edp sink */ >> + if (dp_panel->dpcd[DP_EDP_CONFIGURATION_CAP]) { >> + rlen = drm_dp_dpcd_read(panel->aux, DP_PSR_SUPPORT, >> + &dp_panel->psr_cap, 2); >> + if (rlen == 2) { > >sizeof(dp_panel->psr_cap) perhaps? > Okay >> + DRM_DEBUG_DP("psr version: 0x%x, psr_cap: 0x%x\n", >> + dp_panel->psr_cap.version, >> + dp_panel->psr_cap.capabilities); >> + } else >> + DRM_ERROR("failed to read psr info, rlen=%zd\n", rlen); >> + } >> +} >> + >> static int dp_panel_read_dpcd(struct dp_panel *dp_panel) { >> int rc = 0; >> @@ -104,6 +124,7 @@ static int dp_panel_read_dpcd(struct dp_panel >*dp_panel) >> } >> } >> >> + dp_panel_read_psr_cap(panel); >> end: >> return rc; >> } >> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h >> b/drivers/gpu/drm/msm/dp/dp_panel.h >> index 9023e5b..631657a 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_panel.h >> +++ b/drivers/gpu/drm/msm/dp/dp_panel.h >> @@ -34,6 +34,11 @@ struct dp_panel_in { >> struct dp_catalog *catalog; >> }; >> >> +struct dp_panel_psr { >> + u8 version; >> + u8 capabilities; >> +}; >> + >> struct dp_panel { >> /* dpcd raw data */ >> u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; @@ -46,6 +51,7 @@ struct >> dp_panel { >> struct edid *edid; >> struct drm_connector *connector; >> struct dp_display_mode dp_mode; >> + struct dp_panel_psr psr_cap; >> bool video_test; >> >> u32 vic; >> diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h >> b/drivers/gpu/drm/msm/dp/dp_reg.h index 2686028..7a0b052 100644 >> --- a/drivers/gpu/drm/msm/dp/dp_reg.h >> +++ b/drivers/gpu/drm/msm/dp/dp_reg.h >> @@ -22,6 +22,20 @@ >> #define REG_DP_INTR_STATUS2 (0x00000024) >> #define REG_DP_INTR_STATUS3 (0x00000028) >> >> +#define REG_DP_INTR_STATUS4 (0x0000002C) >> +#define PSR_UPDATE_INT (0x00000001) >> +#define PSR_CAPTURE_INT (0x00000004) >> +#define PSR_EXIT_INT (0x00000010) >> +#define PSR_UPDATE_ERROR_INT (0x00000040) >> +#define PSR_WAKE_ERROR_INT (0x00000100) >> + >> +#define REG_DP_INTR_MASK4 (0x00000030) >> +#define PSR_UPDATE_MASK (0x00000001) >> +#define PSR_CAPTURE_MASK (0x00000002) >> +#define PSR_EXIT_MASK (0x00000004) >> +#define PSR_UPDATE_ERROR_MASK (0x00000008) >> +#define PSR_WAKE_ERROR_MASK (0x00000010) >> + >> #define REG_DP_DP_HPD_CTRL (0x00000000) >> #define DP_DP_HPD_CTRL_HPD_EN (0x00000001) >> >> @@ -164,6 +178,9 @@ >> #define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) >> #define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) >> >> +#define REG_PSR_CONFIG (0x00000100) >> +#define REG_PSR_CMD (0x00000110) >> + >> #define MMSS_DP_PSR_CRC_RG (0x00000154) >> #define MMSS_DP_PSR_CRC_B (0x00000158) >> >> @@ -184,6 +201,8 @@ >> #define MMSS_DP_AUDIO_STREAM_0 (0x00000240) >> #define MMSS_DP_AUDIO_STREAM_1 (0x00000244) >> >> +#define MMSS_DP_SDP_CFG3 (0x0000024c) >> + >> #define MMSS_DP_EXTENSION_0 (0x00000250) >> #define MMSS_DP_EXTENSION_1 (0x00000254) >> #define MMSS_DP_EXTENSION_2 (0x00000258) >> diff --git a/drivers/gpu/drm/msm/msm_drv.h >> b/drivers/gpu/drm/msm/msm_drv.h index ae52412..254fd07 100644 >> --- a/drivers/gpu/drm/msm/msm_drv.h >> +++ b/drivers/gpu/drm/msm/msm_drv.h >> @@ -400,6 +400,8 @@ void msm_dp_snapshot(struct msm_disp_state >> *disp_state, struct msm_dp *dp_displa >> >> void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor >> *minor); >> >> +void msm_dp_display_set_psr(struct msm_dp *dp, bool enter); >> + >> #else >> static inline int __init msm_dp_register(void) { @@ -449,6 +451,10 >> @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display, >> { } >> >> +static inline void msm_dp_display_set_psr(struct msm_dp *dp, bool >> +enter) > >Perhaps I'm missing it, but I don't see that this is called from outside the DP >driver. So why does it need to be in msm_drv.h and why do you need a stub? > Yeah, it was used earlier when DP bridge was not present. It is not needed here anymore. I moved it to dp_display.h >Thanks, >Bjorn > >> +{ >> +} >> + >> #endif >> >> void __init msm_mdp_register(void); >> -- >> 2.7.4 >> Thank you, Sankeerth
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 8a6d3ea..3cd223d 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -45,6 +45,14 @@ #define DP_INTERRUPT_STATUS2_MASK \ (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) +#define DP_INTERRUPT_STATUS4 \ + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) + +#define DP_INTERRUPT_MASK4 \ + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) + struct dp_catalog_private { struct device *dev; struct dp_io *io; @@ -343,6 +351,20 @@ void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog) ln_mapping); } +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, + bool enable) +{ + u32 mainlink_ctrl; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; + mainlink_ctrl |= (enable & DP_MAINLINK_CTRL_ENABLE); + + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); +} + void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable) { @@ -581,6 +603,51 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); } +static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) +{ + /* trigger sdp */ + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x1); + dp_write_link(catalog, MMSS_DP_SDP_CFG3, 0x0); +} + +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 psr_config; + + /* enable PSR1 function */ + psr_config = dp_read_link(catalog, REG_PSR_CONFIG); + psr_config |= BIT(0); + dp_write_link(catalog, REG_PSR_CONFIG, psr_config); + + dp_write_ahb(catalog, REG_DP_INTR_MASK4, DP_INTERRUPT_MASK4); + dp_catalog_enable_sdp(catalog); +} + +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 psr_cmd; + + psr_cmd = dp_read_link(catalog, REG_PSR_CMD); + + /* + * BIT(0) - send psr entry SDP + * BIT(1) - sned psr exit SDP + */ + psr_cmd &= ~(BIT(0) | BIT(1)); + + if (enter) + psr_cmd |= BIT(0); + else + psr_cmd |= BIT(1); + + dp_catalog_enable_sdp(catalog); + dp_write_link(catalog, REG_PSR_CMD, psr_cmd); +} + u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, @@ -608,6 +675,20 @@ u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) return isr; } +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 intr, intr_ack; + + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS4); + intr_ack = (intr & DP_INTERRUPT_STATUS4) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + dp_write_ahb(catalog, REG_DP_INTR_STATUS4, intr_ack); + + return intr; +} + int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 6965afa..9b1b199 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -91,6 +91,7 @@ void dp_catalog_ctrl_state_ctrl(struct dp_catalog *dp_catalog, u32 state); void dp_catalog_ctrl_config_ctrl(struct dp_catalog *dp_catalog, u32 config); void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb); void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, u32 stream_rate_khz, bool fixed_nvid); @@ -101,12 +102,15 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, u32 intr_mask, bool en); void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, u8 p_level); int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); +int dp_catalog_ctrl_get_psr_interrupt(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, u32 dp_tu, u32 valid_boundary, u32 valid_boundary2); diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 88ca6c3..ba828ea 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -21,6 +21,7 @@ #define DP_KHZ_TO_HZ 1000 #define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */ +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / 1000) /* 300 ms */ #define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) #define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) @@ -78,6 +79,7 @@ struct dp_ctrl_private { struct dp_catalog *catalog; struct completion idle_comp; + struct completion psr_op_comp; struct completion video_comp; }; @@ -151,6 +153,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; + if (ctrl->panel->psr_cap.version) + config |= DP_CONFIGURATION_CTRL_SEND_VSC; + dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); } @@ -1365,6 +1370,52 @@ static int dp_ctrl_enable_stream_clocks(struct dp_ctrl_private *ctrl) return ret; } +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + u8 psr_config; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + if (!ctrl->panel->psr_cap.version) + return; + + dp_catalog_ctrl_config_psr(ctrl->catalog); + + psr_config = DP_PSR_ENABLE; + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &psr_config, 1); +} + +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter) +{ + struct dp_ctrl_private *ctrl; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + if (!ctrl->panel->psr_cap.version) + return; + + if (enter) { + reinit_completion(&ctrl->psr_op_comp); + dp_catalog_ctrl_set_psr(ctrl->catalog, true); + + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { + DRM_ERROR("PSR_ENTRY timedout\n"); + dp_catalog_ctrl_set_psr(ctrl->catalog, false); + return; + } + + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); + + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, false); + } else { + dp_catalog_ctrl_psr_mainlink_enable(ctrl->catalog, true); + + dp_catalog_ctrl_set_psr(ctrl->catalog, false); + } +} + int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) { struct dp_ctrl_private *ctrl; @@ -1964,6 +2015,17 @@ void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + if (ctrl->panel->psr_cap.version) { + isr = dp_catalog_ctrl_get_psr_interrupt(ctrl->catalog); + + if (isr == 0x1) + DRM_DEBUG_DP("PSR frame update done\n"); + else if (isr == 0x10) + DRM_DEBUG_DP("PSR exit done\n"); + + complete(&ctrl->psr_op_comp); + } + isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { @@ -2010,6 +2072,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, dev_err(dev, "failed to add DP OPP table\n"); init_completion(&ctrl->idle_comp); + init_completion(&ctrl->psr_op_comp); init_completion(&ctrl->video_comp); /* in parameters */ diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h index 2363a2d..f623035 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h @@ -34,4 +34,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, struct dp_power *power, struct dp_catalog *catalog, struct dp_parser *parser); +void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable); +void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl); + #endif /* _DP_CTRL_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5d314e6..c8d02fb 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -347,6 +347,8 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) edid = dp->panel->edid; + dp->dp_display.psr_supported = !!dp->panel->psr_cap.version; + dp->audio_supported = drm_detect_monitor_audio(edid); dp_panel_handle_sink_request(dp->panel); @@ -871,6 +873,10 @@ static int dp_display_post_enable(struct msm_dp *dp_display) /* signal the connect event late to synchronize video and display */ dp_display_handle_plugged_change(dp_display, true); + + if (dp_display->psr_supported) + dp_ctrl_config_psr(dp->ctrl); + return 0; } @@ -1037,6 +1043,14 @@ static void dp_display_config_hpd(struct dp_display_private *dp) enable_irq(dp->irq); } +void msm_dp_display_set_psr(struct msm_dp *dp_display, bool enter) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + dp_ctrl_set_psr(dp->ctrl, enter); +} + static int hpd_event_thread(void *data) { struct dp_display_private *dp_priv; diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index e3adcd5..6f512f3 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -28,6 +28,7 @@ struct msm_dp { u32 max_dp_lanes; struct dp_audio *dp_audio; + bool psr_supported; }; int dp_display_set_plugged_cb(struct msm_dp *dp_display, diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 2436329..d26ca6a 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -142,6 +142,35 @@ static enum drm_mode_status edp_connector_mode_valid( return MODE_OK; } + + +static int edp_connector_atomic_check(struct drm_connector *connector, + struct drm_atomic_state *state) +{ + struct msm_dp *dp; + struct drm_connector_state *conn_state; + struct drm_crtc_state *crtc_state; + + dp = to_dp_connector(connector)->dp_display; + conn_state = drm_atomic_get_new_connector_state(state, connector); + if (WARN_ON(!conn_state)) + return -ENODEV; + + conn_state->self_refresh_aware = true; + + if (!conn_state->crtc) + return 0; + + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); + if (!crtc_state) + return 0; + + if (crtc_state->self_refresh_active && !dp->psr_supported) + return -EINVAL; + + return 0; +} + static const struct drm_connector_funcs dp_connector_funcs = { .detect = dp_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, @@ -151,6 +180,11 @@ static const struct drm_connector_funcs dp_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; +static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { + .get_modes = dp_connector_get_modes, + .mode_valid = dp_connector_mode_valid, +}; + static const struct drm_connector_funcs edp_connector_funcs = { .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, @@ -159,12 +193,8 @@ static const struct drm_connector_funcs edp_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; -static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { - .get_modes = dp_connector_get_modes, - .mode_valid = dp_connector_mode_valid, -}; - static const struct drm_connector_helper_funcs edp_connector_helper_funcs = { + .atomic_check = edp_connector_atomic_check, .get_modes = edp_connector_get_modes, .mode_valid = edp_connector_mode_valid, }; @@ -258,6 +288,130 @@ static void dp_bridge_post_disable(struct drm_bridge *drm_bridge) msm_dp_display_disable(dp_display, drm_bridge->encoder); } +static struct drm_crtc *dp_bridge_get_old_connector_crtc(struct msm_dp *dp, + struct drm_atomic_state *state) +{ + struct drm_encoder *encoder = dp->encoder; + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_old_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_old_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} + +static struct drm_crtc *dp_bridge_get_new_connector_crtc(struct msm_dp *dp, + struct drm_atomic_state *state) +{ + struct drm_encoder *encoder = dp->encoder; + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_new_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} + +static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_crtc *crtc; + struct drm_crtc_state *old_crtc_state; + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); + struct msm_dp *dp_display = dp_bridge->dp_display; + + crtc = dp_bridge_get_new_connector_crtc(dp_display, old_state); + if (!crtc) + return; + + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); + + /* Exit from self refresh mode */ + if (old_crtc_state && old_crtc_state->self_refresh_active) { + msm_dp_display_set_psr(dp_display, false); + return; + } + + msm_dp_display_enable(dp_display, drm_bridge->encoder); +} + +static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_crtc *crtc; + struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL; + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); + struct msm_dp *dp_display = dp_bridge->dp_display; + + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); + if (!crtc) + goto out; + + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); + if (!new_crtc_state) + goto out; + + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); + if (!old_crtc_state) + goto out; + + /* + * Set self refresh mode if current crtc state is active. + * If old crtc state is active, exit psr before disabling + * the controller. Observed sink stuck in self refresh + * if psr exit is skipped when screen off occurs with + * sink in psr mode. + */ + if (new_crtc_state->self_refresh_active) { + msm_dp_display_set_psr(dp_display, true); + return; + } else if (old_crtc_state->self_refresh_active) { + msm_dp_display_set_psr(dp_display, false); + return; + } + +out: + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder); +} + +static void edp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_crtc *crtc; + struct drm_crtc_state *new_crtc_state = NULL; + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge); + struct msm_dp *dp_display = dp_bridge->dp_display; + + crtc = dp_bridge_get_old_connector_crtc(dp_display, old_state); + if (!crtc) + return; + + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); + if (!new_crtc_state) + return; + + /* Self refresh mode is set in dp_bridge_disable. Skip disable */ + if (new_crtc_state->self_refresh_active) + return; + + msm_dp_display_disable(dp_display, drm_bridge->encoder); +} + static const struct drm_bridge_funcs dp_bridge_ops = { .enable = dp_bridge_enable, .disable = dp_bridge_disable, @@ -265,6 +419,16 @@ static const struct drm_bridge_funcs dp_bridge_ops = { .mode_set = dp_bridge_mode_set, }; +static const struct drm_bridge_funcs edp_bridge_ops = { + .atomic_enable = edp_bridge_atomic_enable, + .atomic_disable = edp_bridge_atomic_disable, + .atomic_post_disable = edp_bridge_atomic_post_disable, + .mode_set = dp_bridge_mode_set, + .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, +}; + struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { @@ -279,7 +443,8 @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_devi dp_bridge->dp_display = dp_display; bridge = &dp_bridge->bridge; - bridge->funcs = &dp_bridge_ops; + bridge->funcs = (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) ? + &edp_bridge_ops : &dp_bridge_ops; bridge->encoder = encoder; rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index d4d31e5..5503c29 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -924,6 +924,26 @@ static int dp_link_process_phy_test_pattern_request( return 0; } +static int dp_link_psr_status(struct dp_link_private *link) +{ + u8 status[2]; + + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, status, 2); + + if (status[0] & DP_PSR_LINK_CRC_ERROR) + DRM_ERROR("PSR LINK CRC ERROR\n"); + else if (status[0] & DP_PSR_RFB_STORAGE_ERROR) + DRM_ERROR("PSR RFB STORAGE ERROR\n"); + else if (status[0] & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); + else if (status[1] & DP_PSR_CAPS_CHANGE) + DRM_INFO("PSR Capability Change\n"); + else + return 0; + + return 1; +} + static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) { return link_status[r - DP_LANE0_1_STATUS]; @@ -1042,6 +1062,8 @@ int dp_link_process_request(struct dp_link *dp_link) dp_link->sink_request |= DP_TEST_LINK_TRAINING; } else if (!dp_link_process_phy_test_pattern_request(link)) { dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; + } else if (dp_link_psr_status(link)) { + DRM_INFO("PSR IRQ_HPD received\n"); } else { ret = dp_link_process_link_status_update(link); if (!ret) { diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 71db10c..e128d73 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -19,6 +19,26 @@ struct dp_panel_private { bool aux_cfg_update_done; }; +static void dp_panel_read_psr_cap(struct dp_panel_private *panel) +{ + ssize_t rlen; + struct dp_panel *dp_panel; + + dp_panel = &panel->dp_panel; + + /* edp sink */ + if (dp_panel->dpcd[DP_EDP_CONFIGURATION_CAP]) { + rlen = drm_dp_dpcd_read(panel->aux, DP_PSR_SUPPORT, + &dp_panel->psr_cap, 2); + if (rlen == 2) { + DRM_DEBUG_DP("psr version: 0x%x, psr_cap: 0x%x\n", + dp_panel->psr_cap.version, + dp_panel->psr_cap.capabilities); + } else + DRM_ERROR("failed to read psr info, rlen=%zd\n", rlen); + } +} + static int dp_panel_read_dpcd(struct dp_panel *dp_panel) { int rc = 0; @@ -104,6 +124,7 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) } } + dp_panel_read_psr_cap(panel); end: return rc; } diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h index 9023e5b..631657a 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.h +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -34,6 +34,11 @@ struct dp_panel_in { struct dp_catalog *catalog; }; +struct dp_panel_psr { + u8 version; + u8 capabilities; +}; + struct dp_panel { /* dpcd raw data */ u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; @@ -46,6 +51,7 @@ struct dp_panel { struct edid *edid; struct drm_connector *connector; struct dp_display_mode dp_mode; + struct dp_panel_psr psr_cap; bool video_test; u32 vic; diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 2686028..7a0b052 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -22,6 +22,20 @@ #define REG_DP_INTR_STATUS2 (0x00000024) #define REG_DP_INTR_STATUS3 (0x00000028) +#define REG_DP_INTR_STATUS4 (0x0000002C) +#define PSR_UPDATE_INT (0x00000001) +#define PSR_CAPTURE_INT (0x00000004) +#define PSR_EXIT_INT (0x00000010) +#define PSR_UPDATE_ERROR_INT (0x00000040) +#define PSR_WAKE_ERROR_INT (0x00000100) + +#define REG_DP_INTR_MASK4 (0x00000030) +#define PSR_UPDATE_MASK (0x00000001) +#define PSR_CAPTURE_MASK (0x00000002) +#define PSR_EXIT_MASK (0x00000004) +#define PSR_UPDATE_ERROR_MASK (0x00000008) +#define PSR_WAKE_ERROR_MASK (0x00000010) + #define REG_DP_DP_HPD_CTRL (0x00000000) #define DP_DP_HPD_CTRL_HPD_EN (0x00000001) @@ -164,6 +178,9 @@ #define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) #define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) +#define REG_PSR_CONFIG (0x00000100) +#define REG_PSR_CMD (0x00000110) + #define MMSS_DP_PSR_CRC_RG (0x00000154) #define MMSS_DP_PSR_CRC_B (0x00000158) @@ -184,6 +201,8 @@ #define MMSS_DP_AUDIO_STREAM_0 (0x00000240) #define MMSS_DP_AUDIO_STREAM_1 (0x00000244) +#define MMSS_DP_SDP_CFG3 (0x0000024c) + #define MMSS_DP_EXTENSION_0 (0x00000250) #define MMSS_DP_EXTENSION_1 (0x00000254) #define MMSS_DP_EXTENSION_2 (0x00000258) diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index ae52412..254fd07 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -400,6 +400,8 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_displa void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor); +void msm_dp_display_set_psr(struct msm_dp *dp, bool enter); + #else static inline int __init msm_dp_register(void) { @@ -449,6 +451,10 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display, { } +static inline void msm_dp_display_set_psr(struct msm_dp *dp, bool enter) +{ +} + #endif void __init msm_mdp_register(void);
Add support for basic panel self refresh (PSR) feature for eDP. Add a new interface to set PSR state in the sink from DPU. Program the eDP controller to issue PSR enter and exit SDP to the sink. Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com> Changes in v2: - Use dp bridge to set psr entry/exit instead of dpu_enocder - Don't modify whitespaces - set self refresh aware from atomic_check - set self refresh aware only if psr is supported - provide a stub for msm_dp_display_set_psr --- drivers/gpu/drm/msm/dp/dp_catalog.c | 81 +++++++++++++++++ drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + drivers/gpu/drm/msm/dp/dp_ctrl.c | 63 +++++++++++++ drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 + drivers/gpu/drm/msm/dp/dp_display.c | 14 +++ drivers/gpu/drm/msm/dp/dp_display.h | 1 + drivers/gpu/drm/msm/dp/dp_drm.c | 177 ++++++++++++++++++++++++++++++++++-- drivers/gpu/drm/msm/dp/dp_link.c | 22 +++++ drivers/gpu/drm/msm/dp/dp_panel.c | 21 +++++ drivers/gpu/drm/msm/dp/dp_panel.h | 6 ++ drivers/gpu/drm/msm/dp/dp_reg.h | 19 ++++ drivers/gpu/drm/msm/msm_drv.h | 6 ++ 12 files changed, 411 insertions(+), 6 deletions(-)