| Message ID | 20211105030434.2828845-15-sean@poorly.run (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/hdcp: Pull HDCP auth/exchange/check into helpers | expand |
Quoting Sean Paul (2021-11-04 20:04:31) > From: Sean Paul <seanpaul@chromium.org> > > This patch adds HDCP 1.x support to msm DP connectors using the new HDCP $ git grep "This patch" -- Documentation/process/ > helpers. > > Cc: Stephen Boyd <swboyd@chromium.org> > Cc: Abhinav Kumar <abhinavk@codeaurora.org> > Signed-off-by: Sean Paul <seanpaul@chromium.org> > Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-15-sean@poorly.run #v1 > Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-14-sean@poorly.run #v2 > Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-15-sean@poorly.run #v3 > > Changes in v2: > -Squash [1] into this patch with the following changes (Stephen) > -Update the sc7180 dtsi file > -Remove resource names and just use index (Stephen) > Changes in v3: > -Split out the dtsi change from v2 (Stephen) > -Fix set-but-unused warning identified by 0-day > -Fix up a couple of style nits (Stephen) > -Store HDCP key directly in dp_hdcp struct (Stephen) > -Remove wmb in HDCP key initialization, move an_seed (Stephen) > -Use FIELD_PREP for bstatus/bcaps (Stephen) > -#define read_poll_timeout values (Stephen) > -Remove unnecessary parentheses in dp_hdcp_store_ksv_fifo (Stephen) > -Add compatible string for hdcp (Stephen) > -Rename dp_hdcp_write_* functions (Abhinav) > -Add 1us delay between An reads (Abhinav) > -Delete unused dp_hdcp_read_* functions > Changes in v4: > -Rebase on Bjorn's multi-dp patchset > > [1] https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-14-sean@poorly.run Looks mostly ok to me. One nit below but otherwise you can have my Reviewed-by: Stephen Boyd <swboyd@chromium.org> > diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c > index da4323556ef3..c16fce17d096 100644 > --- a/drivers/gpu/drm/msm/dp/dp_debug.c > +++ b/drivers/gpu/drm/msm/dp/dp_debug.c > @@ -198,6 +201,35 @@ static int dp_test_active_open(struct inode *inode, > inode->i_private); > } > > +static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf, > + size_t len, loff_t *offp) I deem this API through debugfs no good, but I can see that opening the can of worms that is programming the key other ways is worse, so alright. > +{ > + char *input_buffer; > + int ret; > + struct dp_debug_private *debug = file->private_data; > + > + if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) > + return -EINVAL; > + [....] > diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c > new file mode 100644 > index 000000000000..03ea3a974576 > --- /dev/null > +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c > @@ -0,0 +1,462 @@ [...] > + > +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector) > +{ > + struct drm_device *dev = connector->dev; > + struct drm_hdcp_helper_data *helper_data; > + int ret; > + > + /* HDCP is not configured for this device */ > + if (!hdcp->parser->io.dp_controller.hdcp_key.base) > + return 0; > + > + helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux, > + &dp_hdcp_funcs, false); > + if (IS_ERR_OR_NULL(helper_data)) Just IS_ERR()? > + return PTR_ERR(helper_data); Because PTR_ERR() on NULL is zero. Maybe return PTR_ERR_OR_ZERO() is supposed to be here? Or I don't understand why drm_hdcp_helper_initialize_dp() would return NULL. > + > + ret = drm_connector_attach_content_protection_property(connector, false); > + if (ret) { > + drm_hdcp_helper_destroy(helper_data); > + drm_err(dev, "Failed to attach content protection prop %d\n", ret); > + return ret; > + }
On 05/11/2021 06:04, Sean Paul wrote: > From: Sean Paul <seanpaul@chromium.org> > > This patch adds HDCP 1.x support to msm DP connectors using the new HDCP > helpers. Sean, is this something that you'd like to pursue further? We have picked up patches 8-11, which were independent from the rest of the changes. The rest seems to have dependencies on core changes (which were not acked) > > Cc: Stephen Boyd <swboyd@chromium.org> > Cc: Abhinav Kumar <abhinavk@codeaurora.org> > Signed-off-by: Sean Paul <seanpaul@chromium.org> > Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-15-sean@poorly.run #v1 > Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-14-sean@poorly.run #v2 > Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-15-sean@poorly.run #v3 > > Changes in v2: > -Squash [1] into this patch with the following changes (Stephen) > -Update the sc7180 dtsi file > -Remove resource names and just use index (Stephen) > Changes in v3: > -Split out the dtsi change from v2 (Stephen) > -Fix set-but-unused warning identified by 0-day > -Fix up a couple of style nits (Stephen) > -Store HDCP key directly in dp_hdcp struct (Stephen) > -Remove wmb in HDCP key initialization, move an_seed (Stephen) > -Use FIELD_PREP for bstatus/bcaps (Stephen) > -#define read_poll_timeout values (Stephen) > -Remove unnecessary parentheses in dp_hdcp_store_ksv_fifo (Stephen) > -Add compatible string for hdcp (Stephen) > -Rename dp_hdcp_write_* functions (Abhinav) > -Add 1us delay between An reads (Abhinav) > -Delete unused dp_hdcp_read_* functions > Changes in v4: > -Rebase on Bjorn's multi-dp patchset > > [1] https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-14-sean@poorly.run > --- > drivers/gpu/drm/msm/Makefile | 1 + > drivers/gpu/drm/msm/dp/dp_debug.c | 46 ++- > drivers/gpu/drm/msm/dp/dp_debug.h | 6 +- > drivers/gpu/drm/msm/dp/dp_display.c | 46 ++- > drivers/gpu/drm/msm/dp/dp_display.h | 5 + > drivers/gpu/drm/msm/dp/dp_drm.c | 68 +++- > drivers/gpu/drm/msm/dp/dp_drm.h | 5 + > drivers/gpu/drm/msm/dp/dp_hdcp.c | 462 ++++++++++++++++++++++++++++ > drivers/gpu/drm/msm/dp/dp_hdcp.h | 27 ++ > drivers/gpu/drm/msm/dp/dp_parser.c | 20 +- > drivers/gpu/drm/msm/dp/dp_parser.h | 4 + > drivers/gpu/drm/msm/dp/dp_reg.h | 32 +- > drivers/gpu/drm/msm/msm_atomic.c | 15 + > 13 files changed, 729 insertions(+), 8 deletions(-) > create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.c > create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.h > > diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile > index 40577f8856d8..fb3411a74e61 100644 > --- a/drivers/gpu/drm/msm/Makefile > +++ b/drivers/gpu/drm/msm/Makefile > @@ -108,6 +108,7 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \ > dp/dp_ctrl.o \ > dp/dp_display.o \ > dp/dp_drm.o \ > + dp/dp_hdcp.o \ > dp/dp_hpd.o \ > dp/dp_link.o \ > dp/dp_panel.o \ > diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c > index da4323556ef3..c16fce17d096 100644 > --- a/drivers/gpu/drm/msm/dp/dp_debug.c > +++ b/drivers/gpu/drm/msm/dp/dp_debug.c > @@ -8,6 +8,7 @@ > #include <linux/debugfs.h> > #include <drm/drm_connector.h> > #include <drm/drm_file.h> > +#include <drm/drm_hdcp.h> > > #include "dp_parser.h" > #include "dp_catalog.h" > @@ -15,6 +16,7 @@ > #include "dp_ctrl.h" > #include "dp_debug.h" > #include "dp_display.h" > +#include "dp_hdcp.h" > > #define DEBUG_NAME "msm_dp" > > @@ -25,6 +27,7 @@ struct dp_debug_private { > struct dp_link *link; > struct dp_panel *panel; > struct drm_connector *connector; > + struct dp_hdcp *hdcp; > struct device *dev; > struct drm_device *drm_dev; > > @@ -198,6 +201,35 @@ static int dp_test_active_open(struct inode *inode, > inode->i_private); > } > > +static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf, > + size_t len, loff_t *offp) > +{ > + char *input_buffer; > + int ret; > + struct dp_debug_private *debug = file->private_data; > + > + if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) > + return -EINVAL; > + > + if (!debug->hdcp) > + return -ENOENT; > + > + input_buffer = memdup_user_nul(ubuf, len); > + if (IS_ERR(input_buffer)) > + return PTR_ERR(input_buffer); > + > + ret = dp_hdcp_ingest_key(debug->hdcp, input_buffer, len); > + > + kfree(input_buffer); > + if (ret < 0) { > + DRM_ERROR("Could not ingest HDCP key, ret=%d\n", ret); > + return ret; > + } > + > + *offp += len; > + return len; > +} > + > static const struct file_operations test_active_fops = { > .owner = THIS_MODULE, > .open = dp_test_active_open, > @@ -207,6 +239,12 @@ static const struct file_operations test_active_fops = { > .write = dp_test_active_write > }; > > +static const struct file_operations dp_hdcp_key_fops = { > + .owner = THIS_MODULE, > + .open = simple_open, > + .write = dp_hdcp_key_write, > +}; > + > static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) > { > int rc = 0; > @@ -228,6 +266,10 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) > minor->debugfs_root, > debug, &dp_test_type_fops); > > + debugfs_create_file("msm_dp_hdcp_key", 0222, > + minor->debugfs_root, > + debug, &dp_hdcp_key_fops); > + > debug->root = minor->debugfs_root; > > return rc; > @@ -235,7 +277,8 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) > > struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, > struct dp_usbpd *usbpd, struct dp_link *link, > - struct drm_connector *connector, struct drm_minor *minor) > + struct dp_hdcp *hdcp, struct drm_connector *connector, > + struct drm_minor *minor) > { > int rc = 0; > struct dp_debug_private *debug; > @@ -257,6 +300,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, > debug->usbpd = usbpd; > debug->link = link; > debug->panel = panel; > + debug->hdcp = hdcp; > debug->dev = dev; > debug->drm_dev = minor->dev; > debug->connector = connector; > diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h > index 8c0d0b5178fd..55ab008876e7 100644 > --- a/drivers/gpu/drm/msm/dp/dp_debug.h > +++ b/drivers/gpu/drm/msm/dp/dp_debug.h > @@ -6,6 +6,7 @@ > #ifndef _DP_DEBUG_H_ > #define _DP_DEBUG_H_ > > +#include "dp_hdcp.h" > #include "dp_panel.h" > #include "dp_link.h" > > @@ -43,7 +44,7 @@ struct dp_debug { > */ > struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, > struct dp_usbpd *usbpd, struct dp_link *link, > - struct drm_connector *connector, > + struct dp_hdcp *hdcp, struct drm_connector *connector, > struct drm_minor *minor); > > /** > @@ -60,7 +61,8 @@ void dp_debug_put(struct dp_debug *dp_debug); > static inline > struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, > struct dp_usbpd *usbpd, struct dp_link *link, > - struct drm_connector *connector, struct drm_minor *minor) > + struct dp_hdcp *hdcp, struct drm_connector *connector, > + struct drm_minor *minor) > { > return ERR_PTR(-EINVAL); > } > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c > index 79412a8fbaff..5d8c118e7365 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -27,6 +27,7 @@ > #include "dp_drm.h" > #include "dp_audio.h" > #include "dp_debug.h" > +#include "dp_hdcp.h" > > #define HPD_STRING_SIZE 30 > > @@ -98,6 +99,7 @@ struct dp_display_private { > struct dp_panel *panel; > struct dp_ctrl *ctrl; > struct dp_debug *debug; > + struct dp_hdcp *hdcp; > > struct dp_usbpd_cb usbpd_cb; > struct dp_display_mode dp_mode; > @@ -147,6 +149,15 @@ static struct dp_display_private *dev_get_dp_display_private(struct device *dev) > return container_of(dp, struct dp_display_private, dp_display); > } > > +struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector) > +{ > + struct msm_dp *dp_display = msm_dp_from_connector(connector); > + struct dp_display_private *dp; > + > + dp = container_of(dp_display, struct dp_display_private, dp_display); > + return dp->hdcp; > +} > + > static int dp_add_event(struct dp_display_private *dp_priv, u32 event, > u32 data, u32 delay) > { > @@ -707,6 +718,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) > static void dp_display_deinit_sub_modules(struct dp_display_private *dp) > { > dp_debug_put(dp->debug); > + dp_hdcp_put(dp->hdcp); > dp_audio_put(dp->audio); > dp_panel_put(dp->panel); > dp_aux_put(dp->aux); > @@ -803,8 +815,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp) > goto error_ctrl; > } > > + dp->hdcp = dp_hdcp_get(dp->parser, dp->aux); > + if (IS_ERR(dp->hdcp)) { > + rc = PTR_ERR(dp->hdcp); > + DRM_ERROR("failed to initialize hdcp, rc = %d\n", rc); > + dp->hdcp = NULL; > + goto error_hdcp; > + } > + > return rc; > > +error_hdcp: > + dp_audio_put(dp->audio); > error_ctrl: > dp_panel_put(dp->panel); > error_link: > @@ -919,6 +941,16 @@ int dp_display_set_plugged_cb(struct msm_dp *dp_display, > return 0; > } > > +void dp_display_hdcp_commit(struct msm_dp *dp, struct drm_atomic_state *state) > +{ > + struct dp_display_private *dp_display; > + > + dp_display = container_of(dp, struct dp_display_private, dp_display); > + > + if (dp_display->hdcp) > + dp_hdcp_commit(dp_display->hdcp, state); > +} > + > int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz) > { > const u32 num_components = 3, default_bpp = 24; > @@ -1442,8 +1474,8 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) > dev = &dp->pdev->dev; > > dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, > - dp->link, dp->dp_display.connector, > - minor); > + dp->link, dp->hdcp, > + dp->dp_display.connector, minor); > if (IS_ERR(dp->debug)) { > rc = PTR_ERR(dp->debug); > DRM_ERROR("failed to initialize debug, rc = %d\n", rc); > @@ -1454,12 +1486,16 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) > int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, > struct drm_encoder *encoder) > { > + struct dp_display_private *dp_display_priv; > struct msm_drm_private *priv; > int ret; > > if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev)) > return -EINVAL; > > + dp_display_priv = container_of(dp_display, struct dp_display_private, > + dp_display); > + > priv = dev->dev_private; > dp_display->drm_dev = dev; > > @@ -1480,6 +1516,12 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, > return ret; > } > > + ret = dp_hdcp_attach(dp_display_priv->hdcp, dp_display->connector); > + if (ret) { > + DRM_ERROR("Failed to attach hdcp, ret=%d\n", ret); > + return ret; > + } > + > priv->connectors[priv->num_connectors++] = dp_display->connector; > return 0; > } > diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h > index 8e80e3bac394..1d202223593c 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.h > +++ b/drivers/gpu/drm/msm/dp/dp_display.h > @@ -29,8 +29,13 @@ struct msm_dp { > struct dp_audio *dp_audio; > }; > > +struct drm_atomic_state; > + > int dp_display_set_plugged_cb(struct msm_dp *dp_display, > hdmi_codec_plugged_cb fn, struct device *codec_dev); > +struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector); > +void dp_display_hdcp_commit(struct msm_dp *dp_display, > + struct drm_atomic_state *state); > int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz); > int dp_display_get_modes(struct msm_dp *dp_display, > struct dp_display_mode *dp_mode); > diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c > index 76856c4ee1d6..f6694ed82169 100644 > --- a/drivers/gpu/drm/msm/dp/dp_drm.c > +++ b/drivers/gpu/drm/msm/dp/dp_drm.c > @@ -6,11 +6,20 @@ > #include <drm/drm_atomic_helper.h> > #include <drm/drm_atomic.h> > #include <drm/drm_bridge.h> > +#include <drm/drm_connector.h> > #include <drm/drm_crtc.h> > +#include <drm/drm_hdcp.h> > > #include "msm_drv.h" > #include "msm_kms.h" > #include "dp_drm.h" > +#include "dp_hdcp.h" > + > +struct dp_connector_state { > + struct drm_connector_state base; > + bool hdcp_transition; > +}; > +#define to_dp_connector_state(x) container_of(x, struct dp_connector_state, base) > > struct dp_connector { > struct drm_connector base; > @@ -18,6 +27,11 @@ struct dp_connector { > }; > #define to_dp_connector(x) container_of(x, struct dp_connector, base) > > +struct msm_dp *msm_dp_from_connector(struct drm_connector *connector) > +{ > + return to_dp_connector(connector)->dp_display; > +} > + > /** > * dp_connector_detect - callback to determine if connector is connected > * @conn: Pointer to drm connector structure > @@ -115,20 +129,72 @@ static enum drm_mode_status dp_connector_mode_valid( > return dp_display_validate_mode(dp_disp, mode->clock); > } > > +static int dp_connector_atomic_check(struct drm_connector *connector, > + struct drm_atomic_state *state) > +{ > + struct drm_connector_state *conn_state; > + struct dp_connector_state *dp_state; > + > + conn_state = drm_atomic_get_new_connector_state(state, connector); > + dp_state = to_dp_connector_state(conn_state); > + > + dp_state->hdcp_transition = drm_hdcp_atomic_check(connector, state); > + > + return 0; > +} > + > +static struct drm_connector_state * > +dp_connector_atomic_duplicate_state(struct drm_connector *connector) > +{ > + struct dp_connector_state *state; > + > + state = kzalloc(sizeof(*state), GFP_KERNEL); > + if (!state) > + return NULL; > + > + state->hdcp_transition = false; > + > + __drm_atomic_helper_connector_duplicate_state(connector, &state->base); > + return &state->base; > +} > + > static const struct drm_connector_funcs dp_connector_funcs = { > .detect = dp_connector_detect, > .fill_modes = drm_helper_probe_single_connector_modes, > .destroy = drm_connector_cleanup, > .reset = drm_atomic_helper_connector_reset, > - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > + .atomic_duplicate_state = dp_connector_atomic_duplicate_state, > .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, > + .atomic_check = dp_connector_atomic_check, > }; > > +bool dp_drm_is_connector_msm_dp(struct drm_connector *connector) > +{ > + return connector->funcs == &dp_connector_funcs; > +} > + > +void dp_drm_atomic_commit(struct drm_connector *connector, > + struct drm_connector_state *conn_state, > + struct drm_atomic_state *state) > +{ > + struct dp_connector_state *dp_state; > + struct msm_dp *dp_disp; > + > + dp_state = to_dp_connector_state(conn_state); > + > + if (!dp_state->hdcp_transition) > + return; > + > + dp_disp = msm_dp_from_connector(connector); > + > + dp_display_hdcp_commit(dp_disp, state); > +} > + > /* connector initialization */ > struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display) > { > diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h > index c27bfceefdf0..a5d95c6acd67 100644 > --- a/drivers/gpu/drm/msm/dp/dp_drm.h > +++ b/drivers/gpu/drm/msm/dp/dp_drm.h > @@ -14,5 +14,10 @@ > #include "dp_display.h" > > struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display); > +struct msm_dp *msm_dp_from_connector(struct drm_connector *connector); > +bool dp_drm_is_connector_msm_dp(struct drm_connector *connector); > +void dp_drm_atomic_commit(struct drm_connector *connector, > + struct drm_connector_state *conn_state, > + struct drm_atomic_state *state); > > #endif /* _DP_DRM_H_ */ > diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c > new file mode 100644 > index 000000000000..03ea3a974576 > --- /dev/null > +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c > @@ -0,0 +1,462 @@ > +// SPDX-License-Identifier: MIT > +/* > + * Copyright (C) 2021 Google, Inc. > + * > + * Authors: > + * Sean Paul <seanpaul@chromium.org> > + */ > + > +#include "dp_display.h" > +#include "dp_drm.h" > +#include "dp_hdcp.h" > +#include "dp_reg.h" > + > +#include <drm/drm_connector.h> > +#include <drm/drm_device.h> > +#include <drm/drm_dp_helper.h> > +#include <drm/drm_hdcp.h> > +#include <drm/drm_print.h> > + > +#include <linux/bitfield.h> > +#include <linux/bits.h> > +#include <linux/iopoll.h> > +#include <linux/mutex.h> > +#include <linux/random.h> > +#include <linux/slab.h> > + > +/* Offsets based on hdcp_ksv mmio */ > +#define DP_HDCP_KSV_AN_LSB 0x0 > +#define DP_HDCP_KSV_AN_MSB 0x4 > +#define DP_HDCP_KSV_AKSV_MSB 0x1D8 > +#define DP_HDCP_KSV_AKSV_LSB 0x1DC > + > +/* Key offsets based on hdcp_key mmio */ > +#define DP_HDCP_KEY_BASE 0x30 > +#define DP_HDCP_KEY_MSB(x) (DP_HDCP_KEY_BASE + (x * 8)) > +#define DP_HDCP_KEY_LSB(x) (DP_HDCP_KEY_MSB(x) + 4) > +#define DP_HDCP_KEY_VALID 0x170 > +#define DP_HDCP_SW_KEY_VALID BIT(0) > + > +/* Timeouts */ > +#define DP_KEYS_VALID_SLEEP_US (20 * 1000) > +#define DP_KEYS_VALID_TIMEOUT_US (100 * 1000) > +#define DP_AN_READY_SLEEP_US 100 > +#define DP_AN_READY_TIMEOUT_US (10 * 1000) > +#define DP_R0_READY_SLEEP_US 100 > +#define DP_R0_READY_TIMEOUT_US (10 * 1000) > +#define DP_RI_MATCH_SLEEP_US (20 * 1000) > +#define DP_RI_MATCH_TIMEOUT_US (100 * 1000) > +#define DP_KSV_WRITTEN_SLEEP_US 100 > +#define DP_KSV_WRITTEN_TIMEOUT_US (100 * 1000) > +#define DP_SHA_COMPUTATION_SLEEP_US 100 > +#define DP_SHA_COMPUTATION_TIMEOUT_US (100 * 1000) > +#define DP_AN_READ_DELAY_US 1 > + > +/* > + * dp_hdcp_key - structure which contains an HDCP key set > + * @ksv: The key selection vector > + * @keys: Contains 40 keys > + */ > +struct dp_hdcp_key { > + struct drm_hdcp_ksv ksv; > + union { > + u32 words[2]; > + u8 bytes[DP_HDCP_KEY_LEN]; > + } keys[DP_HDCP_NUM_KEYS]; > + bool valid; > +}; > + > +struct dp_hdcp { > + struct drm_device *dev; > + struct drm_connector *connector; > + > + struct drm_dp_aux *aux; > + struct dp_parser *parser; > + > + struct drm_hdcp_helper_data *helper_data; > + > + struct mutex key_lock; > + struct dp_hdcp_key key; > +}; > + > +static inline void dp_hdcp_write_ahb(struct dp_hdcp *hdcp, u32 offset, u32 val) > +{ > + writel(val, hdcp->parser->io.dp_controller.ahb.base + offset); > +} > + > +static inline u32 dp_hdcp_read_ahb(struct dp_hdcp *hdcp, u32 offset) > +{ > + return readl(hdcp->parser->io.dp_controller.ahb.base + offset); > +} > + > +static inline void dp_hdcp_write_aux(struct dp_hdcp *hdcp, u32 offset, u32 val) > +{ > + writel(val, hdcp->parser->io.dp_controller.aux.base + offset); > +} > + > +static inline u32 dp_hdcp_read_aux(struct dp_hdcp *hdcp, u32 offset) > +{ > + return readl(hdcp->parser->io.dp_controller.aux.base + offset); > +} > + > +static inline void dp_hdcp_write_link(struct dp_hdcp *hdcp, u32 offset, u32 val) > +{ > + writel(val, hdcp->parser->io.dp_controller.link.base + offset); > +} > + > +static inline u32 dp_hdcp_read_link(struct dp_hdcp *hdcp, u32 offset) > +{ > + return readl(hdcp->parser->io.dp_controller.link.base + offset); > +} > + > +static inline void dp_hdcp_write_key(struct dp_hdcp *hdcp, u32 offset, u32 val) > +{ > + writel(val, hdcp->parser->io.dp_controller.hdcp_key.base + offset); > +} > + > +static inline void dp_hdcp_write_tz_hlos(struct dp_hdcp *hdcp, u32 offset, > + u32 val) > +{ > + writel(val, hdcp->parser->io.dp_controller.hdcp_tz.base + offset); > +} > + > +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len) > +{ > + unsigned int ksv_weight; > + int i, ret = 0; > + > + if (raw_len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) { > + DRM_ERROR("Invalid HDCP key length expected=%d actual=%d\n", > + (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN), > + raw_len); > + return -EINVAL; > + } > + > + mutex_lock(&hdcp->key_lock); > + > + memcpy(hdcp->key.ksv.bytes, raw_key, DRM_HDCP_KSV_LEN); > + ksv_weight = hweight32(hdcp->key.ksv.words[0]) + > + hweight32(hdcp->key.ksv.words[1]); > + if (ksv_weight != 20) { > + DRM_ERROR("Invalid ksv weight, expected=20 actual=%d\n", > + ksv_weight); > + ret = -EINVAL; > + goto out; > + } > + > + raw_key += DRM_HDCP_KSV_LEN; > + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { > + memcpy(hdcp->key.keys[i].bytes, raw_key, DP_HDCP_KEY_LEN); > + raw_key += DP_HDCP_KEY_LEN; > + } > + > + DRM_DEBUG_DRIVER("Successfully ingested HDCP key\n"); > + hdcp->key.valid = true; > + > +out: > + mutex_unlock(&hdcp->key_lock); > + return ret; > +} > + > +static bool dp_hdcp_are_keys_valid(struct drm_connector *connector) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + u32 val; > + > + val = dp_hdcp_read_ahb(hdcp, DP_HDCP_STATUS); > + return FIELD_GET(DP_HDCP_KEY_STATUS, val) == DP_HDCP_KEY_STATUS_VALID; > +} > + > +static int dp_hdcp_load_keys(struct drm_connector *connector) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + int i, ret = 0; > + u64 an_seed = get_random_u64(); > + > + mutex_lock(&hdcp->key_lock); > + > + if (!hdcp->key.valid) { > + ret = -ENOENT; > + goto out; > + } > + > + dp_hdcp_write_aux(hdcp, DP_HDCP_SW_LOWER_AKSV, hdcp->key.ksv.words[0]); > + dp_hdcp_write_aux(hdcp, DP_HDCP_SW_UPPER_AKSV, hdcp->key.ksv.words[1]); > + > + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { > + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_LSB(i), > + hdcp->key.keys[i].words[0]); > + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_MSB(i), > + hdcp->key.keys[i].words[1]); > + } > + > + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID); > + > + dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL0, > + FIELD_GET(GENMASK(31,0), an_seed)); > + dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL1, > + FIELD_GET(GENMASK_ULL(63,32), an_seed)); > + > +out: > + mutex_unlock(&hdcp->key_lock); > + return ret; > +} > + > +static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable) > +{ > + *capable = false; > + return 0; > +} > + > +static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, > + u32 *an, u32 *aksv) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + bool keys_valid; > + int ret; > + u32 val; > + > + dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 1); > + > + ret = read_poll_timeout(dp_hdcp_are_keys_valid, keys_valid, keys_valid, > + DP_KEYS_VALID_SLEEP_US, > + DP_KEYS_VALID_TIMEOUT_US, false, connector); > + if (ret) { > + drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret); > + return ret; > + } > + > + /* Clear AInfo */ > + dp_hdcp_write_aux(hdcp, DP_HDCP_RCVPORT_DATA4, 0); > + > + aksv[0] = dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA3); > + aksv[1] = GENMASK(7, 0) & dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA4); > + > + ret = read_poll_timeout(dp_hdcp_read_ahb, val, > + (val & DP_HDCP_AN_READY_MASK) == DP_HDCP_AN_READY_MASK, > + DP_AN_READY_SLEEP_US, DP_AN_READY_TIMEOUT_US, > + false, hdcp, DP_HDCP_STATUS); > + if (ret) { > + drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val, > + ret); > + return ret; > + } > + > + /* > + * Get An from hardware, for unknown reasons we need to read the reg > + * twice to get valid data. > + */ > + dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5); > + an[0] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5); > + > + udelay(DP_AN_READ_DELAY_US); > + > + dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6); > + an[1] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6); > + > + return 0; > +} > + > +static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector, > + u32 *ksv, u32 status, u8 bcaps, > + bool is_repeater) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + u32 val; > + > + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0, > + ksv[0]); > + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1, > + ksv[1]); > + > + val = FIELD_PREP(GENMASK(23, 8), status) | > + FIELD_PREP(GENMASK(7, 0), bcaps); > + > + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12, > + val); > + > + return 0; > +} > + > +static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector) > +{ > + return 0; > +} > + > +static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + int ret; > + u32 val; > + > + ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_R0_READY), > + DP_R0_READY_SLEEP_US, DP_R0_READY_TIMEOUT_US, > + false, hdcp, DP_HDCP_STATUS); > + if (ret) { > + drm_err(hdcp->dev, "HDCP R0 not ready %x/%d\n", val, ret); > + return ret; > + } > + > + return 0; > +} > + > +static int dp_hdcp_hdcp1_match_ri(struct drm_connector *connector, u32 ri_prime) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + int ret; > + u32 val; > + > + dp_hdcp_write_ahb(hdcp, DP_HDCP_RCVPORT_DATA2_0, ri_prime); > + > + ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_RI_MATCH), > + DP_RI_MATCH_SLEEP_US, DP_RI_MATCH_TIMEOUT_US, > + false, hdcp, DP_HDCP_STATUS); > + if (ret) { > + drm_err(hdcp->dev, "Failed to match Ri and Ri` (%08x) %08x/%d\n", > + ri_prime, val, ret); > + return ret; > + } > + return 0; > +} > + > +static int dp_hdcp_hdcp1_store_ksv_fifo(struct drm_connector *connector, > + u8 *ksv_fifo, u8 num_downstream, > + u8 *bstatus, u32 *vprime) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + int num_bytes = num_downstream * DRM_HDCP_KSV_LEN; > + int ret, i; > + u32 val; > + > + /* Reset the SHA computation block */ > + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, > + DP_HDCP_SHA_CTRL_RESET); > + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0); > + > + /* > + * KSV info gets written a byte at a time in the same order it was > + * received. Every 64 bytes, we need to wait for the SHA_BLOCK_DONE > + * bit to be set in SHA_CTRL. > + */ > + for (i = 0; i < num_bytes; i++) { > + val = FIELD_PREP(DP_HDCP_SHA_DATA_MASK, ksv_fifo[i]); > + > + if (i == (num_bytes - 1)) > + val |= DP_HDCP_SHA_DATA_DONE; > + > + dp_hdcp_write_tz_hlos(hdcp, > + HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA, > + val); > + > + if (((i + 1) % 64) != 0) > + continue; > + > + ret = read_poll_timeout(dp_hdcp_read_ahb, val, > + (val & DP_HDCP_SHA_DONE), > + DP_KSV_WRITTEN_SLEEP_US, > + DP_KSV_WRITTEN_TIMEOUT_US, false, hdcp, > + DP_HDCP_SHA_STATUS); > + if (ret) { > + drm_err(hdcp->dev, "SHA block incomplete %d\n", ret); > + return ret; > + } > + } > + > + ret = read_poll_timeout(dp_hdcp_read_ahb, val, > + (val & DP_HDCP_SHA_COMP_DONE), > + DP_SHA_COMPUTATION_SLEEP_US, > + DP_SHA_COMPUTATION_TIMEOUT_US, > + false, hdcp, DP_HDCP_SHA_STATUS); > + if (ret) { > + drm_err(hdcp->dev, "SHA computation incomplete %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static int dp_hdcp_hdcp1_disable(struct drm_connector *connector) > +{ > + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); > + u32 val; > + > + val = dp_hdcp_read_ahb(hdcp, REG_DP_SW_RESET); > + dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET); > + > + /* Disable encryption and disable the HDCP block */ > + dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 0); > + > + dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val); > + > + return 0; > +} > + > +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state) > +{ > + drm_hdcp_helper_atomic_commit(hdcp->helper_data, state, NULL); > +} > + > +static const struct drm_hdcp_helper_funcs dp_hdcp_funcs = { > + .are_keys_valid = dp_hdcp_are_keys_valid, > + .load_keys = dp_hdcp_load_keys, > + .hdcp2_capable = dp_hdcp_hdcp2_capable, > + .hdcp1_read_an_aksv = dp_hdcp_hdcp1_read_an_aksv, > + .hdcp1_store_receiver_info = dp_hdcp_hdcp1_store_receiver_info, > + .hdcp1_enable_encryption = dp_hdcp_hdcp1_enable_encryption, > + .hdcp1_wait_for_r0 = dp_hdcp_hdcp1_wait_for_r0, > + .hdcp1_match_ri = dp_hdcp_hdcp1_match_ri, > + .hdcp1_store_ksv_fifo = dp_hdcp_hdcp1_store_ksv_fifo, > + .hdcp1_disable = dp_hdcp_hdcp1_disable, > +}; > + > +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector) > +{ > + struct drm_device *dev = connector->dev; > + struct drm_hdcp_helper_data *helper_data; > + int ret; > + > + /* HDCP is not configured for this device */ > + if (!hdcp->parser->io.dp_controller.hdcp_key.base) > + return 0; > + > + helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux, > + &dp_hdcp_funcs, false); > + if (IS_ERR_OR_NULL(helper_data)) > + return PTR_ERR(helper_data); > + > + ret = drm_connector_attach_content_protection_property(connector, false); > + if (ret) { > + drm_hdcp_helper_destroy(helper_data); > + drm_err(dev, "Failed to attach content protection prop %d\n", ret); > + return ret; > + } > + > + hdcp->dev = connector->dev; > + hdcp->connector = connector; > + hdcp->helper_data = helper_data; > + > + return 0; > +} > + > +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux) > +{ > + struct device *dev = &parser->pdev->dev; > + struct dp_hdcp *hdcp; > + > + hdcp = devm_kzalloc(dev, sizeof(*hdcp), GFP_KERNEL); > + if (!hdcp) > + return ERR_PTR(-ENOMEM); > + > + hdcp->parser = parser; > + hdcp->aux = aux; > + > + mutex_init(&hdcp->key_lock); > + > + return hdcp; > +} > + > +void dp_hdcp_put(struct dp_hdcp *hdcp) > +{ > + if (hdcp) > + drm_hdcp_helper_destroy(hdcp->helper_data); > +} > diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.h b/drivers/gpu/drm/msm/dp/dp_hdcp.h > new file mode 100644 > index 000000000000..5637a9b0dea2 > --- /dev/null > +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h > @@ -0,0 +1,27 @@ > +// SPDX-License-Identifier: MIT > +/* > + * Copyright (C) 2021 Google, Inc. > + * > + * Authors: > + * Sean Paul <seanpaul@chromium.org> > + */ > + > +#ifndef DP_HDCP_H_ > +#define DP_HDCP_H_ > + > +#define DP_HDCP_KEY_LEN 7 > +#define DP_HDCP_NUM_KEYS 40 > + > +struct dp_hdcp; > +struct dp_parser; > +struct drm_atomic_state; > +struct drm_dp_aux; > + > +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux); > +void dp_hdcp_put(struct dp_hdcp *hdcp); > + > +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector); > +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len); > +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state); > + > +#endif > diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c > index a7acc23f742b..5d35ef46120b 100644 > --- a/drivers/gpu/drm/msm/dp/dp_parser.c > +++ b/drivers/gpu/drm/msm/dp/dp_parser.c > @@ -66,7 +66,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) > DRM_ERROR("legacy memory region not large enough\n"); > return -EINVAL; > } > - > dss->ahb.len = DP_DEFAULT_AHB_SIZE; > dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET; > dss->aux.len = DP_DEFAULT_AUX_SIZE; > @@ -74,6 +73,10 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) > dss->link.len = DP_DEFAULT_LINK_SIZE; > dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET; > dss->p0.len = DP_DEFAULT_P0_SIZE; > + dss->hdcp_key.base = NULL; > + dss->hdcp_key.len = 0; > + dss->hdcp_tz.base = NULL; > + dss->hdcp_tz.len = 0; > } else { > DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base); > return PTR_ERR(dss->aux.base); > @@ -90,6 +93,21 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) > DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base); > return PTR_ERR(dss->p0.base); > } > + > + dss->hdcp_key.base = dp_ioremap(pdev, 5, &dss->hdcp_key.len); > + if (!IS_ERR(dss->hdcp_key.base)) { > + dss->hdcp_tz.base = dp_ioremap(pdev, 6, &dss->hdcp_tz.len); > + if (IS_ERR(dss->hdcp_tz.base)) { > + DRM_ERROR("unable to remap hdcp_tz region: %pe\n", > + dss->hdcp_tz.base); > + return PTR_ERR(dss->hdcp_tz.base); > + } > + } else { > + dss->hdcp_key.base = NULL; > + dss->hdcp_key.len = 0; > + dss->hdcp_tz.base = NULL; > + dss->hdcp_tz.len = 0; > + } > } > > io->phy = devm_phy_get(&pdev->dev, "dp"); > diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h > index 3172da089421..4edd499ebaf2 100644 > --- a/drivers/gpu/drm/msm/dp/dp_parser.h > +++ b/drivers/gpu/drm/msm/dp/dp_parser.h > @@ -35,6 +35,8 @@ struct dss_io_data { > struct dss_io_region aux; > struct dss_io_region link; > struct dss_io_region p0; > + struct dss_io_region hdcp_key; > + struct dss_io_region hdcp_tz; > }; > > static inline const char *dp_parser_pm_name(enum dp_pm_type module) > @@ -69,6 +71,8 @@ struct dp_display_data { > * struct dp_ctrl_resource - controller's IO related data > * > * @dp_controller: Display Port controller mapped memory address > + * @hdcp_key: mapped memory for HDCP key ingestion > + * @hdcp_tz: mapped memory for HDCP TZ interaction > * @phy_io: phy's mapped memory address > */ > struct dp_io { > diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h > index 268602803d9a..61ab70850f6b 100644 > --- a/drivers/gpu/drm/msm/dp/dp_reg.h > +++ b/drivers/gpu/drm/msm/dp/dp_reg.h > @@ -6,11 +6,14 @@ > #ifndef _DP_REG_H_ > #define _DP_REG_H_ > > +#include <linux/bits.h> > + > /* DP_TX Registers */ > #define REG_DP_HW_VERSION (0x00000000) > > #define REG_DP_SW_RESET (0x00000010) > -#define DP_SW_RESET (0x00000001) > +#define DP_SW_RESET BIT(0) > +#define DP_HDCP_SW_RESET BIT(1) > > #define REG_DP_PHY_CTRL (0x00000014) > #define DP_PHY_CTRL_SW_RESET_PLL (0x00000001) > @@ -283,19 +286,46 @@ > /* DP HDCP 1.3 registers */ > #define DP_HDCP_CTRL (0x0A0) > #define DP_HDCP_STATUS (0x0A4) > +#define DP_HDCP_KEY_STATUS GENMASK(18, 16) > +#define DP_HDCP_KEY_STATUS_NO_KEYS 0 > +#define DP_HDCP_KEY_STATUS_NOT_CHECKED 1 > +#define DP_HDCP_KEY_STATUS_CHECKING 2 > +#define DP_HDCP_KEY_STATUS_VALID 3 > +#define DP_HDCP_KEY_STATUS_INVALID_AKSV 4 > +#define DP_HDCP_KEY_STATUS_BAD_CHECKSUM 5 > +#define DP_HDCP_KEY_STATUS_PROD_AKSV 6 > +#define DP_HDCP_KEY_STATUS_RESV 7 > +#define DP_HDCP_R0_READY BIT(14) > +#define DP_HDCP_SHA_V_MATCH BIT(13) > +#define DP_HDCP_RI_MATCH BIT(12) > +#define DP_HDCP_AN_MSB_READY BIT(9) > +#define DP_HDCP_AN_LSB_READY BIT(8) > +#define DP_HDCP_AN_READY_MASK (DP_HDCP_AN_MSB_READY | DP_HDCP_AN_LSB_READY) > +#define DP_HDCP_AUTH_FAIL_INFO GENMASK(7, 4) > +#define DP_HDCP_AUTH_FAIL_INVALID_AKSV 3 > +#define DP_HDCP_AUTH_FAIL_INVALID_BKSV 4 > +#define DP_HDCP_AUTH_FAIL_RI_MISMATCH 5 > +#define DP_HDCP_AUTH_FAIL BIT(2) > +#define DP_HDCP_AUTH_SUCCESS BIT(0) > #define DP_HDCP_SW_UPPER_AKSV (0x098) > #define DP_HDCP_SW_LOWER_AKSV (0x09C) > #define DP_HDCP_ENTROPY_CTRL0 (0x350) > #define DP_HDCP_ENTROPY_CTRL1 (0x35C) > #define DP_HDCP_SHA_STATUS (0x0C8) > +#define DP_HDCP_SHA_COMP_DONE BIT(4) > +#define DP_HDCP_SHA_DONE BIT(0) > #define DP_HDCP_RCVPORT_DATA2_0 (0x0B0) > #define DP_HDCP_RCVPORT_DATA3 (0x0A4) > #define DP_HDCP_RCVPORT_DATA4 (0x0A8) > #define DP_HDCP_RCVPORT_DATA5 (0x0C0) > #define DP_HDCP_RCVPORT_DATA6 (0x0C4) > +#define DP_HDCP_RCVPORT_DATA7 (0x0C8) > > #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL (0x024) > +#define DP_HDCP_SHA_CTRL_RESET BIT(0) > #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA (0x028) > +#define DP_HDCP_SHA_DATA_MASK GENMASK(23, 16) > +#define DP_HDCP_SHA_DATA_DONE BIT(0) > #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0 (0x004) > #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1 (0x008) > #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA7 (0x00C) > diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c > index 27c9ae563f2f..8bcade1c1e6c 100644 > --- a/drivers/gpu/drm/msm/msm_atomic.c > +++ b/drivers/gpu/drm/msm/msm_atomic.c > @@ -8,6 +8,7 @@ > #include <drm/drm_gem_atomic_helper.h> > #include <drm/drm_vblank.h> > > +#include "dp_drm.h" > #include "msm_atomic_trace.h" > #include "msm_drv.h" > #include "msm_gem.h" > @@ -194,6 +195,18 @@ static unsigned get_crtc_mask(struct drm_atomic_state *state) > return mask; > } > > +static void msm_atomic_commit_connectors(struct drm_atomic_state *state) > +{ > + struct drm_connector_state *conn_state; > + struct drm_connector *connector; > + int i; > + > + for_each_new_connector_in_state(state, connector, conn_state, i) { > + if (dp_drm_is_connector_msm_dp(connector)) > + dp_drm_atomic_commit(connector, conn_state, state); > + } > +} > + > void msm_atomic_commit_tail(struct drm_atomic_state *state) > { > struct drm_device *dev = state->dev; > @@ -230,6 +243,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state) > drm_atomic_helper_commit_planes(dev, state, 0); > drm_atomic_helper_commit_modeset_enables(dev, state); > > + msm_atomic_commit_connectors(state); > + > if (async) { > struct msm_pending_timer *timer = > &kms->pending_timers[drm_crtc_index(async_crtc)];
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 40577f8856d8..fb3411a74e61 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -108,6 +108,7 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \ dp/dp_ctrl.o \ dp/dp_display.o \ dp/dp_drm.o \ + dp/dp_hdcp.o \ dp/dp_hpd.o \ dp/dp_link.o \ dp/dp_panel.o \ diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index da4323556ef3..c16fce17d096 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -8,6 +8,7 @@ #include <linux/debugfs.h> #include <drm/drm_connector.h> #include <drm/drm_file.h> +#include <drm/drm_hdcp.h> #include "dp_parser.h" #include "dp_catalog.h" @@ -15,6 +16,7 @@ #include "dp_ctrl.h" #include "dp_debug.h" #include "dp_display.h" +#include "dp_hdcp.h" #define DEBUG_NAME "msm_dp" @@ -25,6 +27,7 @@ struct dp_debug_private { struct dp_link *link; struct dp_panel *panel; struct drm_connector *connector; + struct dp_hdcp *hdcp; struct device *dev; struct drm_device *drm_dev; @@ -198,6 +201,35 @@ static int dp_test_active_open(struct inode *inode, inode->i_private); } +static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf, + size_t len, loff_t *offp) +{ + char *input_buffer; + int ret; + struct dp_debug_private *debug = file->private_data; + + if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) + return -EINVAL; + + if (!debug->hdcp) + return -ENOENT; + + input_buffer = memdup_user_nul(ubuf, len); + if (IS_ERR(input_buffer)) + return PTR_ERR(input_buffer); + + ret = dp_hdcp_ingest_key(debug->hdcp, input_buffer, len); + + kfree(input_buffer); + if (ret < 0) { + DRM_ERROR("Could not ingest HDCP key, ret=%d\n", ret); + return ret; + } + + *offp += len; + return len; +} + static const struct file_operations test_active_fops = { .owner = THIS_MODULE, .open = dp_test_active_open, @@ -207,6 +239,12 @@ static const struct file_operations test_active_fops = { .write = dp_test_active_write }; +static const struct file_operations dp_hdcp_key_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = dp_hdcp_key_write, +}; + static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) { int rc = 0; @@ -228,6 +266,10 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) minor->debugfs_root, debug, &dp_test_type_fops); + debugfs_create_file("msm_dp_hdcp_key", 0222, + minor->debugfs_root, + debug, &dp_hdcp_key_fops); + debug->root = minor->debugfs_root; return rc; @@ -235,7 +277,8 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector *connector, struct drm_minor *minor) + struct dp_hdcp *hdcp, struct drm_connector *connector, + struct drm_minor *minor) { int rc = 0; struct dp_debug_private *debug; @@ -257,6 +300,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, debug->usbpd = usbpd; debug->link = link; debug->panel = panel; + debug->hdcp = hdcp; debug->dev = dev; debug->drm_dev = minor->dev; debug->connector = connector; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 8c0d0b5178fd..55ab008876e7 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -6,6 +6,7 @@ #ifndef _DP_DEBUG_H_ #define _DP_DEBUG_H_ +#include "dp_hdcp.h" #include "dp_panel.h" #include "dp_link.h" @@ -43,7 +44,7 @@ struct dp_debug { */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector *connector, + struct dp_hdcp *hdcp, struct drm_connector *connector, struct drm_minor *minor); /** @@ -60,7 +61,8 @@ void dp_debug_put(struct dp_debug *dp_debug); static inline struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector *connector, struct drm_minor *minor) + struct dp_hdcp *hdcp, struct drm_connector *connector, + struct drm_minor *minor) { return ERR_PTR(-EINVAL); } diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 79412a8fbaff..5d8c118e7365 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -27,6 +27,7 @@ #include "dp_drm.h" #include "dp_audio.h" #include "dp_debug.h" +#include "dp_hdcp.h" #define HPD_STRING_SIZE 30 @@ -98,6 +99,7 @@ struct dp_display_private { struct dp_panel *panel; struct dp_ctrl *ctrl; struct dp_debug *debug; + struct dp_hdcp *hdcp; struct dp_usbpd_cb usbpd_cb; struct dp_display_mode dp_mode; @@ -147,6 +149,15 @@ static struct dp_display_private *dev_get_dp_display_private(struct device *dev) return container_of(dp, struct dp_display_private, dp_display); } +struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector) +{ + struct msm_dp *dp_display = msm_dp_from_connector(connector); + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + return dp->hdcp; +} + static int dp_add_event(struct dp_display_private *dp_priv, u32 event, u32 data, u32 delay) { @@ -707,6 +718,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) static void dp_display_deinit_sub_modules(struct dp_display_private *dp) { dp_debug_put(dp->debug); + dp_hdcp_put(dp->hdcp); dp_audio_put(dp->audio); dp_panel_put(dp->panel); dp_aux_put(dp->aux); @@ -803,8 +815,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp) goto error_ctrl; } + dp->hdcp = dp_hdcp_get(dp->parser, dp->aux); + if (IS_ERR(dp->hdcp)) { + rc = PTR_ERR(dp->hdcp); + DRM_ERROR("failed to initialize hdcp, rc = %d\n", rc); + dp->hdcp = NULL; + goto error_hdcp; + } + return rc; +error_hdcp: + dp_audio_put(dp->audio); error_ctrl: dp_panel_put(dp->panel); error_link: @@ -919,6 +941,16 @@ int dp_display_set_plugged_cb(struct msm_dp *dp_display, return 0; } +void dp_display_hdcp_commit(struct msm_dp *dp, struct drm_atomic_state *state) +{ + struct dp_display_private *dp_display; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + if (dp_display->hdcp) + dp_hdcp_commit(dp_display->hdcp, state); +} + int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz) { const u32 num_components = 3, default_bpp = 24; @@ -1442,8 +1474,8 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev; dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, - dp->link, dp->dp_display.connector, - minor); + dp->link, dp->hdcp, + dp->dp_display.connector, minor); if (IS_ERR(dp->debug)) { rc = PTR_ERR(dp->debug); DRM_ERROR("failed to initialize debug, rc = %d\n", rc); @@ -1454,12 +1486,16 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { + struct dp_display_private *dp_display_priv; struct msm_drm_private *priv; int ret; if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev)) return -EINVAL; + dp_display_priv = container_of(dp_display, struct dp_display_private, + dp_display); + priv = dev->dev_private; dp_display->drm_dev = dev; @@ -1480,6 +1516,12 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, return ret; } + ret = dp_hdcp_attach(dp_display_priv->hdcp, dp_display->connector); + if (ret) { + DRM_ERROR("Failed to attach hdcp, ret=%d\n", ret); + return ret; + } + priv->connectors[priv->num_connectors++] = dp_display->connector; return 0; } diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 8e80e3bac394..1d202223593c 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -29,8 +29,13 @@ struct msm_dp { struct dp_audio *dp_audio; }; +struct drm_atomic_state; + int dp_display_set_plugged_cb(struct msm_dp *dp_display, hdmi_codec_plugged_cb fn, struct device *codec_dev); +struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector); +void dp_display_hdcp_commit(struct msm_dp *dp_display, + struct drm_atomic_state *state); int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz); int dp_display_get_modes(struct msm_dp *dp_display, struct dp_display_mode *dp_mode); diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 76856c4ee1d6..f6694ed82169 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -6,11 +6,20 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_atomic.h> #include <drm/drm_bridge.h> +#include <drm/drm_connector.h> #include <drm/drm_crtc.h> +#include <drm/drm_hdcp.h> #include "msm_drv.h" #include "msm_kms.h" #include "dp_drm.h" +#include "dp_hdcp.h" + +struct dp_connector_state { + struct drm_connector_state base; + bool hdcp_transition; +}; +#define to_dp_connector_state(x) container_of(x, struct dp_connector_state, base) struct dp_connector { struct drm_connector base; @@ -18,6 +27,11 @@ struct dp_connector { }; #define to_dp_connector(x) container_of(x, struct dp_connector, base) +struct msm_dp *msm_dp_from_connector(struct drm_connector *connector) +{ + return to_dp_connector(connector)->dp_display; +} + /** * dp_connector_detect - callback to determine if connector is connected * @conn: Pointer to drm connector structure @@ -115,20 +129,72 @@ static enum drm_mode_status dp_connector_mode_valid( return dp_display_validate_mode(dp_disp, mode->clock); } +static int dp_connector_atomic_check(struct drm_connector *connector, + struct drm_atomic_state *state) +{ + struct drm_connector_state *conn_state; + struct dp_connector_state *dp_state; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + dp_state = to_dp_connector_state(conn_state); + + dp_state->hdcp_transition = drm_hdcp_atomic_check(connector, state); + + return 0; +} + +static struct drm_connector_state * +dp_connector_atomic_duplicate_state(struct drm_connector *connector) +{ + struct dp_connector_state *state; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + + state->hdcp_transition = false; + + __drm_atomic_helper_connector_duplicate_state(connector, &state->base); + return &state->base; +} + static const struct drm_connector_funcs dp_connector_funcs = { .detect = dp_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_duplicate_state = dp_connector_atomic_duplicate_state, .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, + .atomic_check = dp_connector_atomic_check, }; +bool dp_drm_is_connector_msm_dp(struct drm_connector *connector) +{ + return connector->funcs == &dp_connector_funcs; +} + +void dp_drm_atomic_commit(struct drm_connector *connector, + struct drm_connector_state *conn_state, + struct drm_atomic_state *state) +{ + struct dp_connector_state *dp_state; + struct msm_dp *dp_disp; + + dp_state = to_dp_connector_state(conn_state); + + if (!dp_state->hdcp_transition) + return; + + dp_disp = msm_dp_from_connector(connector); + + dp_display_hdcp_commit(dp_disp, state); +} + /* connector initialization */ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display) { diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h index c27bfceefdf0..a5d95c6acd67 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.h +++ b/drivers/gpu/drm/msm/dp/dp_drm.h @@ -14,5 +14,10 @@ #include "dp_display.h" struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display); +struct msm_dp *msm_dp_from_connector(struct drm_connector *connector); +bool dp_drm_is_connector_msm_dp(struct drm_connector *connector); +void dp_drm_atomic_commit(struct drm_connector *connector, + struct drm_connector_state *conn_state, + struct drm_atomic_state *state); #endif /* _DP_DRM_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c new file mode 100644 index 000000000000..03ea3a974576 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c @@ -0,0 +1,462 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2021 Google, Inc. + * + * Authors: + * Sean Paul <seanpaul@chromium.org> + */ + +#include "dp_display.h" +#include "dp_drm.h" +#include "dp_hdcp.h" +#include "dp_reg.h" + +#include <drm/drm_connector.h> +#include <drm/drm_device.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_hdcp.h> +#include <drm/drm_print.h> + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/iopoll.h> +#include <linux/mutex.h> +#include <linux/random.h> +#include <linux/slab.h> + +/* Offsets based on hdcp_ksv mmio */ +#define DP_HDCP_KSV_AN_LSB 0x0 +#define DP_HDCP_KSV_AN_MSB 0x4 +#define DP_HDCP_KSV_AKSV_MSB 0x1D8 +#define DP_HDCP_KSV_AKSV_LSB 0x1DC + +/* Key offsets based on hdcp_key mmio */ +#define DP_HDCP_KEY_BASE 0x30 +#define DP_HDCP_KEY_MSB(x) (DP_HDCP_KEY_BASE + (x * 8)) +#define DP_HDCP_KEY_LSB(x) (DP_HDCP_KEY_MSB(x) + 4) +#define DP_HDCP_KEY_VALID 0x170 +#define DP_HDCP_SW_KEY_VALID BIT(0) + +/* Timeouts */ +#define DP_KEYS_VALID_SLEEP_US (20 * 1000) +#define DP_KEYS_VALID_TIMEOUT_US (100 * 1000) +#define DP_AN_READY_SLEEP_US 100 +#define DP_AN_READY_TIMEOUT_US (10 * 1000) +#define DP_R0_READY_SLEEP_US 100 +#define DP_R0_READY_TIMEOUT_US (10 * 1000) +#define DP_RI_MATCH_SLEEP_US (20 * 1000) +#define DP_RI_MATCH_TIMEOUT_US (100 * 1000) +#define DP_KSV_WRITTEN_SLEEP_US 100 +#define DP_KSV_WRITTEN_TIMEOUT_US (100 * 1000) +#define DP_SHA_COMPUTATION_SLEEP_US 100 +#define DP_SHA_COMPUTATION_TIMEOUT_US (100 * 1000) +#define DP_AN_READ_DELAY_US 1 + +/* + * dp_hdcp_key - structure which contains an HDCP key set + * @ksv: The key selection vector + * @keys: Contains 40 keys + */ +struct dp_hdcp_key { + struct drm_hdcp_ksv ksv; + union { + u32 words[2]; + u8 bytes[DP_HDCP_KEY_LEN]; + } keys[DP_HDCP_NUM_KEYS]; + bool valid; +}; + +struct dp_hdcp { + struct drm_device *dev; + struct drm_connector *connector; + + struct drm_dp_aux *aux; + struct dp_parser *parser; + + struct drm_hdcp_helper_data *helper_data; + + struct mutex key_lock; + struct dp_hdcp_key key; +}; + +static inline void dp_hdcp_write_ahb(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.ahb.base + offset); +} + +static inline u32 dp_hdcp_read_ahb(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.dp_controller.ahb.base + offset); +} + +static inline void dp_hdcp_write_aux(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.aux.base + offset); +} + +static inline u32 dp_hdcp_read_aux(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.dp_controller.aux.base + offset); +} + +static inline void dp_hdcp_write_link(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.link.base + offset); +} + +static inline u32 dp_hdcp_read_link(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.dp_controller.link.base + offset); +} + +static inline void dp_hdcp_write_key(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.hdcp_key.base + offset); +} + +static inline void dp_hdcp_write_tz_hlos(struct dp_hdcp *hdcp, u32 offset, + u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.hdcp_tz.base + offset); +} + +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len) +{ + unsigned int ksv_weight; + int i, ret = 0; + + if (raw_len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) { + DRM_ERROR("Invalid HDCP key length expected=%d actual=%d\n", + (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN), + raw_len); + return -EINVAL; + } + + mutex_lock(&hdcp->key_lock); + + memcpy(hdcp->key.ksv.bytes, raw_key, DRM_HDCP_KSV_LEN); + ksv_weight = hweight32(hdcp->key.ksv.words[0]) + + hweight32(hdcp->key.ksv.words[1]); + if (ksv_weight != 20) { + DRM_ERROR("Invalid ksv weight, expected=20 actual=%d\n", + ksv_weight); + ret = -EINVAL; + goto out; + } + + raw_key += DRM_HDCP_KSV_LEN; + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + memcpy(hdcp->key.keys[i].bytes, raw_key, DP_HDCP_KEY_LEN); + raw_key += DP_HDCP_KEY_LEN; + } + + DRM_DEBUG_DRIVER("Successfully ingested HDCP key\n"); + hdcp->key.valid = true; + +out: + mutex_unlock(&hdcp->key_lock); + return ret; +} + +static bool dp_hdcp_are_keys_valid(struct drm_connector *connector) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + val = dp_hdcp_read_ahb(hdcp, DP_HDCP_STATUS); + return FIELD_GET(DP_HDCP_KEY_STATUS, val) == DP_HDCP_KEY_STATUS_VALID; +} + +static int dp_hdcp_load_keys(struct drm_connector *connector) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int i, ret = 0; + u64 an_seed = get_random_u64(); + + mutex_lock(&hdcp->key_lock); + + if (!hdcp->key.valid) { + ret = -ENOENT; + goto out; + } + + dp_hdcp_write_aux(hdcp, DP_HDCP_SW_LOWER_AKSV, hdcp->key.ksv.words[0]); + dp_hdcp_write_aux(hdcp, DP_HDCP_SW_UPPER_AKSV, hdcp->key.ksv.words[1]); + + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_LSB(i), + hdcp->key.keys[i].words[0]); + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_MSB(i), + hdcp->key.keys[i].words[1]); + } + + dp_hdcp_write_key(hdcp, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID); + + dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL0, + FIELD_GET(GENMASK(31,0), an_seed)); + dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL1, + FIELD_GET(GENMASK_ULL(63,32), an_seed)); + +out: + mutex_unlock(&hdcp->key_lock); + return ret; +} + +static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable) +{ + *capable = false; + return 0; +} + +static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, + u32 *an, u32 *aksv) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + bool keys_valid; + int ret; + u32 val; + + dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 1); + + ret = read_poll_timeout(dp_hdcp_are_keys_valid, keys_valid, keys_valid, + DP_KEYS_VALID_SLEEP_US, + DP_KEYS_VALID_TIMEOUT_US, false, connector); + if (ret) { + drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret); + return ret; + } + + /* Clear AInfo */ + dp_hdcp_write_aux(hdcp, DP_HDCP_RCVPORT_DATA4, 0); + + aksv[0] = dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA3); + aksv[1] = GENMASK(7, 0) & dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA4); + + ret = read_poll_timeout(dp_hdcp_read_ahb, val, + (val & DP_HDCP_AN_READY_MASK) == DP_HDCP_AN_READY_MASK, + DP_AN_READY_SLEEP_US, DP_AN_READY_TIMEOUT_US, + false, hdcp, DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val, + ret); + return ret; + } + + /* + * Get An from hardware, for unknown reasons we need to read the reg + * twice to get valid data. + */ + dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5); + an[0] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5); + + udelay(DP_AN_READ_DELAY_US); + + dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6); + an[1] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6); + + return 0; +} + +static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector, + u32 *ksv, u32 status, u8 bcaps, + bool is_repeater) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0, + ksv[0]); + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1, + ksv[1]); + + val = FIELD_PREP(GENMASK(23, 8), status) | + FIELD_PREP(GENMASK(7, 0), bcaps); + + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12, + val); + + return 0; +} + +static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector) +{ + return 0; +} + +static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int ret; + u32 val; + + ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_R0_READY), + DP_R0_READY_SLEEP_US, DP_R0_READY_TIMEOUT_US, + false, hdcp, DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "HDCP R0 not ready %x/%d\n", val, ret); + return ret; + } + + return 0; +} + +static int dp_hdcp_hdcp1_match_ri(struct drm_connector *connector, u32 ri_prime) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int ret; + u32 val; + + dp_hdcp_write_ahb(hdcp, DP_HDCP_RCVPORT_DATA2_0, ri_prime); + + ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_RI_MATCH), + DP_RI_MATCH_SLEEP_US, DP_RI_MATCH_TIMEOUT_US, + false, hdcp, DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "Failed to match Ri and Ri` (%08x) %08x/%d\n", + ri_prime, val, ret); + return ret; + } + return 0; +} + +static int dp_hdcp_hdcp1_store_ksv_fifo(struct drm_connector *connector, + u8 *ksv_fifo, u8 num_downstream, + u8 *bstatus, u32 *vprime) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int num_bytes = num_downstream * DRM_HDCP_KSV_LEN; + int ret, i; + u32 val; + + /* Reset the SHA computation block */ + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, + DP_HDCP_SHA_CTRL_RESET); + dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0); + + /* + * KSV info gets written a byte at a time in the same order it was + * received. Every 64 bytes, we need to wait for the SHA_BLOCK_DONE + * bit to be set in SHA_CTRL. + */ + for (i = 0; i < num_bytes; i++) { + val = FIELD_PREP(DP_HDCP_SHA_DATA_MASK, ksv_fifo[i]); + + if (i == (num_bytes - 1)) + val |= DP_HDCP_SHA_DATA_DONE; + + dp_hdcp_write_tz_hlos(hdcp, + HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA, + val); + + if (((i + 1) % 64) != 0) + continue; + + ret = read_poll_timeout(dp_hdcp_read_ahb, val, + (val & DP_HDCP_SHA_DONE), + DP_KSV_WRITTEN_SLEEP_US, + DP_KSV_WRITTEN_TIMEOUT_US, false, hdcp, + DP_HDCP_SHA_STATUS); + if (ret) { + drm_err(hdcp->dev, "SHA block incomplete %d\n", ret); + return ret; + } + } + + ret = read_poll_timeout(dp_hdcp_read_ahb, val, + (val & DP_HDCP_SHA_COMP_DONE), + DP_SHA_COMPUTATION_SLEEP_US, + DP_SHA_COMPUTATION_TIMEOUT_US, + false, hdcp, DP_HDCP_SHA_STATUS); + if (ret) { + drm_err(hdcp->dev, "SHA computation incomplete %d\n", ret); + return ret; + } + + return 0; +} + +static int dp_hdcp_hdcp1_disable(struct drm_connector *connector) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + val = dp_hdcp_read_ahb(hdcp, REG_DP_SW_RESET); + dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET); + + /* Disable encryption and disable the HDCP block */ + dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 0); + + dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val); + + return 0; +} + +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state) +{ + drm_hdcp_helper_atomic_commit(hdcp->helper_data, state, NULL); +} + +static const struct drm_hdcp_helper_funcs dp_hdcp_funcs = { + .are_keys_valid = dp_hdcp_are_keys_valid, + .load_keys = dp_hdcp_load_keys, + .hdcp2_capable = dp_hdcp_hdcp2_capable, + .hdcp1_read_an_aksv = dp_hdcp_hdcp1_read_an_aksv, + .hdcp1_store_receiver_info = dp_hdcp_hdcp1_store_receiver_info, + .hdcp1_enable_encryption = dp_hdcp_hdcp1_enable_encryption, + .hdcp1_wait_for_r0 = dp_hdcp_hdcp1_wait_for_r0, + .hdcp1_match_ri = dp_hdcp_hdcp1_match_ri, + .hdcp1_store_ksv_fifo = dp_hdcp_hdcp1_store_ksv_fifo, + .hdcp1_disable = dp_hdcp_hdcp1_disable, +}; + +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_hdcp_helper_data *helper_data; + int ret; + + /* HDCP is not configured for this device */ + if (!hdcp->parser->io.dp_controller.hdcp_key.base) + return 0; + + helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux, + &dp_hdcp_funcs, false); + if (IS_ERR_OR_NULL(helper_data)) + return PTR_ERR(helper_data); + + ret = drm_connector_attach_content_protection_property(connector, false); + if (ret) { + drm_hdcp_helper_destroy(helper_data); + drm_err(dev, "Failed to attach content protection prop %d\n", ret); + return ret; + } + + hdcp->dev = connector->dev; + hdcp->connector = connector; + hdcp->helper_data = helper_data; + + return 0; +} + +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux) +{ + struct device *dev = &parser->pdev->dev; + struct dp_hdcp *hdcp; + + hdcp = devm_kzalloc(dev, sizeof(*hdcp), GFP_KERNEL); + if (!hdcp) + return ERR_PTR(-ENOMEM); + + hdcp->parser = parser; + hdcp->aux = aux; + + mutex_init(&hdcp->key_lock); + + return hdcp; +} + +void dp_hdcp_put(struct dp_hdcp *hdcp) +{ + if (hdcp) + drm_hdcp_helper_destroy(hdcp->helper_data); +} diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.h b/drivers/gpu/drm/msm/dp/dp_hdcp.h new file mode 100644 index 000000000000..5637a9b0dea2 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2021 Google, Inc. + * + * Authors: + * Sean Paul <seanpaul@chromium.org> + */ + +#ifndef DP_HDCP_H_ +#define DP_HDCP_H_ + +#define DP_HDCP_KEY_LEN 7 +#define DP_HDCP_NUM_KEYS 40 + +struct dp_hdcp; +struct dp_parser; +struct drm_atomic_state; +struct drm_dp_aux; + +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux); +void dp_hdcp_put(struct dp_hdcp *hdcp); + +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector); +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len); +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state); + +#endif diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index a7acc23f742b..5d35ef46120b 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -66,7 +66,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) DRM_ERROR("legacy memory region not large enough\n"); return -EINVAL; } - dss->ahb.len = DP_DEFAULT_AHB_SIZE; dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET; dss->aux.len = DP_DEFAULT_AUX_SIZE; @@ -74,6 +73,10 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) dss->link.len = DP_DEFAULT_LINK_SIZE; dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET; dss->p0.len = DP_DEFAULT_P0_SIZE; + dss->hdcp_key.base = NULL; + dss->hdcp_key.len = 0; + dss->hdcp_tz.base = NULL; + dss->hdcp_tz.len = 0; } else { DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base); return PTR_ERR(dss->aux.base); @@ -90,6 +93,21 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base); return PTR_ERR(dss->p0.base); } + + dss->hdcp_key.base = dp_ioremap(pdev, 5, &dss->hdcp_key.len); + if (!IS_ERR(dss->hdcp_key.base)) { + dss->hdcp_tz.base = dp_ioremap(pdev, 6, &dss->hdcp_tz.len); + if (IS_ERR(dss->hdcp_tz.base)) { + DRM_ERROR("unable to remap hdcp_tz region: %pe\n", + dss->hdcp_tz.base); + return PTR_ERR(dss->hdcp_tz.base); + } + } else { + dss->hdcp_key.base = NULL; + dss->hdcp_key.len = 0; + dss->hdcp_tz.base = NULL; + dss->hdcp_tz.len = 0; + } } io->phy = devm_phy_get(&pdev->dev, "dp"); diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 3172da089421..4edd499ebaf2 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -35,6 +35,8 @@ struct dss_io_data { struct dss_io_region aux; struct dss_io_region link; struct dss_io_region p0; + struct dss_io_region hdcp_key; + struct dss_io_region hdcp_tz; }; static inline const char *dp_parser_pm_name(enum dp_pm_type module) @@ -69,6 +71,8 @@ struct dp_display_data { * struct dp_ctrl_resource - controller's IO related data * * @dp_controller: Display Port controller mapped memory address + * @hdcp_key: mapped memory for HDCP key ingestion + * @hdcp_tz: mapped memory for HDCP TZ interaction * @phy_io: phy's mapped memory address */ struct dp_io { diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 268602803d9a..61ab70850f6b 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -6,11 +6,14 @@ #ifndef _DP_REG_H_ #define _DP_REG_H_ +#include <linux/bits.h> + /* DP_TX Registers */ #define REG_DP_HW_VERSION (0x00000000) #define REG_DP_SW_RESET (0x00000010) -#define DP_SW_RESET (0x00000001) +#define DP_SW_RESET BIT(0) +#define DP_HDCP_SW_RESET BIT(1) #define REG_DP_PHY_CTRL (0x00000014) #define DP_PHY_CTRL_SW_RESET_PLL (0x00000001) @@ -283,19 +286,46 @@ /* DP HDCP 1.3 registers */ #define DP_HDCP_CTRL (0x0A0) #define DP_HDCP_STATUS (0x0A4) +#define DP_HDCP_KEY_STATUS GENMASK(18, 16) +#define DP_HDCP_KEY_STATUS_NO_KEYS 0 +#define DP_HDCP_KEY_STATUS_NOT_CHECKED 1 +#define DP_HDCP_KEY_STATUS_CHECKING 2 +#define DP_HDCP_KEY_STATUS_VALID 3 +#define DP_HDCP_KEY_STATUS_INVALID_AKSV 4 +#define DP_HDCP_KEY_STATUS_BAD_CHECKSUM 5 +#define DP_HDCP_KEY_STATUS_PROD_AKSV 6 +#define DP_HDCP_KEY_STATUS_RESV 7 +#define DP_HDCP_R0_READY BIT(14) +#define DP_HDCP_SHA_V_MATCH BIT(13) +#define DP_HDCP_RI_MATCH BIT(12) +#define DP_HDCP_AN_MSB_READY BIT(9) +#define DP_HDCP_AN_LSB_READY BIT(8) +#define DP_HDCP_AN_READY_MASK (DP_HDCP_AN_MSB_READY | DP_HDCP_AN_LSB_READY) +#define DP_HDCP_AUTH_FAIL_INFO GENMASK(7, 4) +#define DP_HDCP_AUTH_FAIL_INVALID_AKSV 3 +#define DP_HDCP_AUTH_FAIL_INVALID_BKSV 4 +#define DP_HDCP_AUTH_FAIL_RI_MISMATCH 5 +#define DP_HDCP_AUTH_FAIL BIT(2) +#define DP_HDCP_AUTH_SUCCESS BIT(0) #define DP_HDCP_SW_UPPER_AKSV (0x098) #define DP_HDCP_SW_LOWER_AKSV (0x09C) #define DP_HDCP_ENTROPY_CTRL0 (0x350) #define DP_HDCP_ENTROPY_CTRL1 (0x35C) #define DP_HDCP_SHA_STATUS (0x0C8) +#define DP_HDCP_SHA_COMP_DONE BIT(4) +#define DP_HDCP_SHA_DONE BIT(0) #define DP_HDCP_RCVPORT_DATA2_0 (0x0B0) #define DP_HDCP_RCVPORT_DATA3 (0x0A4) #define DP_HDCP_RCVPORT_DATA4 (0x0A8) #define DP_HDCP_RCVPORT_DATA5 (0x0C0) #define DP_HDCP_RCVPORT_DATA6 (0x0C4) +#define DP_HDCP_RCVPORT_DATA7 (0x0C8) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL (0x024) +#define DP_HDCP_SHA_CTRL_RESET BIT(0) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA (0x028) +#define DP_HDCP_SHA_DATA_MASK GENMASK(23, 16) +#define DP_HDCP_SHA_DATA_DONE BIT(0) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0 (0x004) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1 (0x008) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA7 (0x00C) diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 27c9ae563f2f..8bcade1c1e6c 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -8,6 +8,7 @@ #include <drm/drm_gem_atomic_helper.h> #include <drm/drm_vblank.h> +#include "dp_drm.h" #include "msm_atomic_trace.h" #include "msm_drv.h" #include "msm_gem.h" @@ -194,6 +195,18 @@ static unsigned get_crtc_mask(struct drm_atomic_state *state) return mask; } +static void msm_atomic_commit_connectors(struct drm_atomic_state *state) +{ + struct drm_connector_state *conn_state; + struct drm_connector *connector; + int i; + + for_each_new_connector_in_state(state, connector, conn_state, i) { + if (dp_drm_is_connector_msm_dp(connector)) + dp_drm_atomic_commit(connector, conn_state, state); + } +} + void msm_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; @@ -230,6 +243,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_commit_planes(dev, state, 0); drm_atomic_helper_commit_modeset_enables(dev, state); + msm_atomic_commit_connectors(state); + if (async) { struct msm_pending_timer *timer = &kms->pending_timers[drm_crtc_index(async_crtc)];