| Message ID | 20210520065046.28978-3-laurent.pinchart+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Converter R-Car DU to the DRM bridge connector helper | expand |
Hi Laurent, On 20/05/2021 07:50, Laurent Pinchart wrote: > Replace the manual panel handling with usage of the DRM panel bridge > helper. This simplifies the driver, and brings support for > DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. > That's a lot of code removal. Excellent. Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > --- > drivers/gpu/drm/rcar-du/rcar_lvds.c | 120 +++------------------------- > 1 file changed, 12 insertions(+), 108 deletions(-) > > diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c > index 70dbbe44bb23..1b360e06658c 100644 > --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c > +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c > @@ -63,7 +63,6 @@ struct rcar_lvds { > struct drm_bridge bridge; > > struct drm_bridge *next_bridge; > - struct drm_connector connector; > struct drm_panel *panel; > > void __iomem *mmio; > @@ -80,73 +79,11 @@ struct rcar_lvds { > #define bridge_to_rcar_lvds(b) \ > container_of(b, struct rcar_lvds, bridge) > > -#define connector_to_rcar_lvds(c) \ > - container_of(c, struct rcar_lvds, connector) > - > static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data) > { > iowrite32(data, lvds->mmio + reg); > } > > -/* ----------------------------------------------------------------------------- > - * Connector & Panel > - */ > - > -static int rcar_lvds_connector_get_modes(struct drm_connector *connector) > -{ > - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); > - > - return drm_panel_get_modes(lvds->panel, connector); > -} > - > -static int rcar_lvds_connector_atomic_check(struct drm_connector *connector, > - struct drm_atomic_state *state) > -{ > - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); > - const struct drm_display_mode *panel_mode; > - struct drm_connector_state *conn_state; > - struct drm_crtc_state *crtc_state; > - > - conn_state = drm_atomic_get_new_connector_state(state, connector); > - if (!conn_state->crtc) > - return 0; > - > - if (list_empty(&connector->modes)) { > - dev_dbg(lvds->dev, "connector: empty modes list\n"); > - return -EINVAL; > - } > - > - panel_mode = list_first_entry(&connector->modes, > - struct drm_display_mode, head); > - > - /* We're not allowed to modify the resolution. */ > - crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc); > - if (IS_ERR(crtc_state)) > - return PTR_ERR(crtc_state); > - > - if (crtc_state->mode.hdisplay != panel_mode->hdisplay || > - crtc_state->mode.vdisplay != panel_mode->vdisplay) > - return -EINVAL; > - > - /* The flat panel mode is fixed, just copy it to the adjusted mode. */ > - drm_mode_copy(&crtc_state->adjusted_mode, panel_mode); > - > - return 0; > -} > - > -static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = { > - .get_modes = rcar_lvds_connector_get_modes, > - .atomic_check = rcar_lvds_connector_atomic_check, > -}; > - > -static const struct drm_connector_funcs rcar_lvds_conn_funcs = { > - .reset = drm_atomic_helper_connector_reset, > - .fill_modes = drm_helper_probe_single_connector_modes, > - .destroy = drm_connector_cleanup, > - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > -}; > - > /* ----------------------------------------------------------------------------- > * PLL Setup > */ > @@ -583,11 +520,6 @@ static void __rcar_lvds_atomic_enable(struct drm_bridge *bridge, > /* Turn the output on. */ > lvdcr0 |= LVDCR0_LVRES; > rcar_lvds_write(lvds, LVDCR0, lvdcr0); > - > - if (lvds->panel) { > - drm_panel_prepare(lvds->panel); > - drm_panel_enable(lvds->panel); > - } > } > > static void rcar_lvds_atomic_enable(struct drm_bridge *bridge, > @@ -609,11 +541,6 @@ static void rcar_lvds_atomic_disable(struct drm_bridge *bridge, > { > struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); > > - if (lvds->panel) { > - drm_panel_disable(lvds->panel); > - drm_panel_unprepare(lvds->panel); > - } > - > rcar_lvds_write(lvds, LVDCR0, 0); > rcar_lvds_write(lvds, LVDCR1, 0); > rcar_lvds_write(lvds, LVDPLLCR, 0); > @@ -648,45 +575,13 @@ static int rcar_lvds_attach(struct drm_bridge *bridge, > enum drm_bridge_attach_flags flags) > { > struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); > - struct drm_connector *connector = &lvds->connector; > - struct drm_encoder *encoder = bridge->encoder; > - int ret; > > - /* If we have a next bridge just attach it. */ > - if (lvds->next_bridge) > - return drm_bridge_attach(bridge->encoder, lvds->next_bridge, > - bridge, flags); > - > - if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { > - DRM_ERROR("Fix bridge driver to make connector optional!"); > - return -EINVAL; > - } > - > - /* Otherwise if we have a panel, create a connector. */ > - if (!lvds->panel) > - return 0; > - > - ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs, > - DRM_MODE_CONNECTOR_LVDS); > - if (ret < 0) > - return ret; > - > - drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs); > - > - ret = drm_connector_attach_encoder(connector, encoder); > - if (ret < 0) > - return ret; > - > - return 0; > -} > - > -static void rcar_lvds_detach(struct drm_bridge *bridge) > -{ > + return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge, > + flags); > } > > static const struct drm_bridge_funcs rcar_lvds_bridge_ops = { > .attach = rcar_lvds_attach, > - .detach = rcar_lvds_detach, > .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > .atomic_reset = drm_atomic_helper_bridge_reset, > @@ -759,7 +654,7 @@ static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds) > * that we are expected to generate even pixels from the primary > * encoder, and odd pixels from the companion encoder. > */ > - if (lvds->next_bridge && lvds->next_bridge->timings && > + if (lvds->next_bridge->timings && > lvds->next_bridge->timings->dual_link) > lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS; > else > @@ -811,6 +706,15 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) > if (ret) > goto done; > > + if (lvds->panel) { > + lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev, > + lvds->panel); > + if (IS_ERR_OR_NULL(lvds->next_bridge)) { > + ret = -EINVAL; > + goto done; > + } > + } > + > if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) > ret = rcar_lvds_parse_dt_companion(lvds); > >
Hi Laurent, On Thu, May 20, 2021 at 8:51 AM Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> wrote: > Replace the manual panel handling with usage of the DRM panel bridge > helper. This simplifies the driver, and brings support for > DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Thanks for your patch, which is now commit e9e056949c927e5b ("drm: rcar-du: lvds: Convert to DRM panel bridge helper") in drm-next. This causes the following scary messages in the kernel log on Ebisu-4D: [drm:drm_bridge_attach] *ERROR* failed to attach bridge /soc/lvds-encoder@feb90100 to encoder None-66: -22 renesas_sdhi_internal_dmac ee100000.mmc: mmc1 base at 0x00000000ee100000, max clock rate 200 MHz rcar-du feb00000.display: failed to initialize encoder /soc/lvds-encoder@feb90100 on output 3 (-22), skipping renesas_sdhi_internal_dmac ee120000.mmc: mmc2 base at 0x00000000ee120000, max clock rate 200 MHz ------------[ cut here ]------------ renesas_sdhi_internal_dmac ee160000.mmc: mmc0 base at 0x00000000ee160000, max clock rate 200 MHz possible_clones mismatch: [ENCODER:62:None-62] mask=0x1 possible_clones=0x3 vs. [ENCODER:66:None-66] mask=0x4 possible_clones=0x3 WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583 drm_mode_config_validate+0x3cc/0x4c8 CPU: 1 PID: 68 Comm: kworker/u4:2 Not tainted 5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277 Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT) Workqueue: events_unbound deferred_probe_work_func pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) pc : drm_mode_config_validate+0x3cc/0x4c8 lr : drm_mode_config_validate+0x3cc/0x4c8 sp : ffff80001239ba80 x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001 x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490f80 mmc0: new HS400 MMC card at address 0001 x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20 x20: ffff000009de8018 x19: ffff00000a490b80 x18: 0000000000000020 x17: 7364766c2f636f73 x16: 0000000000004a12 x15: ffff00000892df38 x14: 0000000000000000 x13: 0000000000000003 x12: ffff8000113e3a80 x11: 0000000000000001 x10: 0000000000000078 mmcblk0: mmc0:0001 BGSD3R 29.1 GiB x9 : ffff800011172994 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_mode_config_validate+0x3cc/0x4c8 drm_dev_register+0x174/0x208 rcar_du_probe+0xc4/0x110 platform_probe+0x64/0xd0 really_probe+0x134/0x2e8 __driver_probe_device+0x74/0xd8 driver_probe_device+0x3c/0xe0 __device_attach_driver+0xa8/0xf0 bus_for_each_drv+0x74/0xc8 __device_attach+0xec/0x148 device_initial_probe+0x10/0x18 bus_probe_device+0x98/0xa0 mmcblk0boot0: mmc0:0001 BGSD3R 16.0 MiB deferred_probe_work_func+0x88/0xc0 process_one_work+0x284/0x6d0 worker_thread+0x48/0x418 kthread+0x14c/0x158 ret_from_fork+0x10/0x18 irq event stamp: 27688 hardirqs last enabled at (27687): [<ffff800010104424>] vprintk_emit+0x2f4/0x2f8 hardirqs last disabled at (27688): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88 mmcblk0boot1: mmc0:0001 BGSD3R 16.0 MiB softirqs last enabled at (27616): [<ffff8000100104ac>] _stext+0x4ac/0x620 softirqs last disabled at (27607): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0 ---[ end trace 6e42cb0428a6481b ]--- ------------[ cut here ]------------ mmcblk0rpmb: mmc0:0001 BGSD3R 4.00 MiB, chardev (243:0) possible_clones mismatch: [ENCODER:64:None-64] mask=0x2 possible_clones=0x3 vs. [ENCODER:66:None-66] mask=0x4 possible_clones=0x3 WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583 drm_mode_config_validate+0x3cc/0x4c8 CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W 5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277 Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT) Workqueue: events_unbound deferred_probe_work_func pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) pc : drm_mode_config_validate+0x3cc/0x4c8 lr : drm_mode_config_validate+0x3cc/0x4c8 sp : ffff80001239ba80 x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001 x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490f80 x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20 x20: ffff000009de8018 x19: ffff00000a490d80 x18: 0000000000000010 x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765 x14: 000000000000014d x13: ffff00000892df38 x12: 00000000ffffffea x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_mode_config_validate+0x3cc/0x4c8 drm_dev_register+0x174/0x208 rcar_du_probe+0xc4/0x110 platform_probe+0x64/0xd0 really_probe+0x134/0x2e8 __driver_probe_device+0x74/0xd8 driver_probe_device+0x3c/0xe0 __device_attach_driver+0xa8/0xf0 bus_for_each_drv+0x74/0xc8 __device_attach+0xec/0x148 device_initial_probe+0x10/0x18 bus_probe_device+0x98/0xa0 deferred_probe_work_func+0x88/0xc0 process_one_work+0x284/0x6d0 worker_thread+0x48/0x418 kthread+0x14c/0x158 ret_from_fork+0x10/0x18 irq event stamp: 27858 hardirqs last enabled at (27857): [<ffff800010103e84>] console_unlock+0x4d4/0x638 hardirqs last disabled at (27858): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88 softirqs last enabled at (27822): [<ffff8000100104ac>] _stext+0x4ac/0x620 softirqs last disabled at (27817): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0 ---[ end trace 6e42cb0428a6481c ]--- ------------[ cut here ]------------ possible_clones mismatch: [ENCODER:66:None-66] mask=0x4 possible_clones=0x3 vs. [ENCODER:62:None-62] mask=0x1 possible_clones=0x3 WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583 drm_mode_config_validate+0x3cc/0x4c8 CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W 5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277 Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT) Workqueue: events_unbound deferred_probe_work_func pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) pc : drm_mode_config_validate+0x3cc/0x4c8 lr : drm_mode_config_validate+0x3cc/0x4c8 sp : ffff80001239ba80 x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001 x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490b80 x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20 x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010 x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765 x14: 0000000000000179 x13: ffff00000892df38 x12: 00000000ffffffea x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_mode_config_validate+0x3cc/0x4c8 drm_dev_register+0x174/0x208 rcar_du_probe+0xc4/0x110 platform_probe+0x64/0xd0 really_probe+0x134/0x2e8 __driver_probe_device+0x74/0xd8 driver_probe_device+0x3c/0xe0 __device_attach_driver+0xa8/0xf0 bus_for_each_drv+0x74/0xc8 __device_attach+0xec/0x148 device_initial_probe+0x10/0x18 bus_probe_device+0x98/0xa0 deferred_probe_work_func+0x88/0xc0 process_one_work+0x284/0x6d0 worker_thread+0x48/0x418 kthread+0x14c/0x158 ret_from_fork+0x10/0x18 irq event stamp: 27888 hardirqs last enabled at (27887): [<ffff800010103e84>] console_unlock+0x4d4/0x638 hardirqs last disabled at (27888): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88 softirqs last enabled at (27866): [<ffff8000100104ac>] _stext+0x4ac/0x620 softirqs last disabled at (27861): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0 ---[ end trace 6e42cb0428a6481d ]--- ------------[ cut here ]------------ possible_clones mismatch: [ENCODER:66:None-66] mask=0x4 possible_clones=0x3 vs. [ENCODER:64:None-64] mask=0x2 possible_clones=0x3 WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583 drm_mode_config_validate+0x3cc/0x4c8 CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W 5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277 Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT) Workqueue: events_unbound deferred_probe_work_func pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) pc : drm_mode_config_validate+0x3cc/0x4c8 lr : drm_mode_config_validate+0x3cc/0x4c8 sp : ffff80001239ba80 x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001 x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490d80 x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20 x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010 x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765 x14: 00000000000001a5 x13: ffff00000892df38 x12: 00000000ffffffea x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_mode_config_validate+0x3cc/0x4c8 drm_dev_register+0x174/0x208 rcar_du_probe+0xc4/0x110 platform_probe+0x64/0xd0 really_probe+0x134/0x2e8 __driver_probe_device+0x74/0xd8 driver_probe_device+0x3c/0xe0 __device_attach_driver+0xa8/0xf0 bus_for_each_drv+0x74/0xc8 __device_attach+0xec/0x148 device_initial_probe+0x10/0x18 bus_probe_device+0x98/0xa0 deferred_probe_work_func+0x88/0xc0 process_one_work+0x284/0x6d0 worker_thread+0x48/0x418 kthread+0x14c/0x158 ret_from_fork+0x10/0x18 irq event stamp: 27924 hardirqs last enabled at (27923): [<ffff800010103e84>] console_unlock+0x4d4/0x638 hardirqs last disabled at (27924): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88 softirqs last enabled at (27902): [<ffff8000100104ac>] _stext+0x4ac/0x620 softirqs last disabled at (27891): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0 ---[ end trace 6e42cb0428a6481e ]--- ------------[ cut here ]------------ Bogus possible_clones: [ENCODER:66:None-66] possible_clones=0x3 (full encoder mask=0x1f) WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:594 drm_mode_config_validate+0x150/0x4c8 CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W 5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277 Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT) Workqueue: events_unbound deferred_probe_work_func pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) pc : drm_mode_config_validate+0x150/0x4c8 lr : drm_mode_config_validate+0x150/0x4c8 sp : ffff80001239ba80 x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001 x26: ffff000009de8868 x25: 000000000000001f x24: ffff000009de8860 x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20 x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010 x17: 203378303d73656e x16: 6f6c635f656c6269 x15: 0720072007200720 x14: 00000000000001d1 x13: ffff00000892df38 x12: 00000000ffffffea x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_mode_config_validate+0x150/0x4c8 drm_dev_register+0x174/0x208 rcar_du_probe+0xc4/0x110 platform_probe+0x64/0xd0 really_probe+0x134/0x2e8 __driver_probe_device+0x74/0xd8 driver_probe_device+0x3c/0xe0 __device_attach_driver+0xa8/0xf0 bus_for_each_drv+0x74/0xc8 __device_attach+0xec/0x148 device_initial_probe+0x10/0x18 bus_probe_device+0x98/0xa0 deferred_probe_work_func+0x88/0xc0 process_one_work+0x284/0x6d0 worker_thread+0x48/0x418 kthread+0x14c/0x158 ret_from_fork+0x10/0x18 irq event stamp: 27966 hardirqs last enabled at (27965): [<ffff800010103e84>] console_unlock+0x4d4/0x638 hardirqs last disabled at (27966): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88 softirqs last enabled at (27940): [<ffff8000100104ac>] _stext+0x4ac/0x620 softirqs last disabled at (27927): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0 ---[ end trace 6e42cb0428a6481f ]--- [drm] Initialized rcar-du 1.0.0 20130110 for feb00000.display on minor 0 drm] Device feb00000.display probed Console: switching to colour frame buffer device 128x48 rcar-du feb00000.display: [drm] fb0: rcar-du frame buffer device Reverting this commit fixes the issue. Note that I have no actual display device attached, so I do not know if display out really works. Salvator-X(S) seems to be fine, with the same disclaimer. Gr{oetje,eeting}s, Geert
Hi Laurent, On Tue, Aug 10, 2021 at 5:47 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Thu, May 20, 2021 at 8:51 AM Laurent Pinchart > <laurent.pinchart+renesas@ideasonboard.com> wrote: > > Replace the manual panel handling with usage of the DRM panel bridge > > helper. This simplifies the driver, and brings support for > > DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > Thanks for your patch, which is now commit e9e056949c927e5b ("drm: > rcar-du: lvds: Convert to DRM panel bridge helper") in drm-next. > > This causes the following scary messages in the kernel log on Ebisu-4D: > > [drm:drm_bridge_attach] *ERROR* failed to attach bridge > Reverting this commit fixes the issue. Oops, that's not true (should not write tentative messages while booting a test kernel, and press send without checking first ;-) Reverting the commit doesn't seem to make a difference. But the parent 5bcc48395b9f35da ("drm: bridge: dw-hdmi: Attach to next bridge if available") of the bad commit is fine. Gr{oetje,eeting}s, Geert
Hi Geert, On Tue, Aug 10, 2021 at 05:51:57PM +0200, Geert Uytterhoeven wrote: > On Tue, Aug 10, 2021 at 5:47 PM Geert Uytterhoeven wrote: > > On Thu, May 20, 2021 at 8:51 AM Laurent Pinchart wrote: > > > Replace the manual panel handling with usage of the DRM panel bridge > > > helper. This simplifies the driver, and brings support for > > > DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. > > > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > > > Thanks for your patch, which is now commit e9e056949c927e5b ("drm: > > rcar-du: lvds: Convert to DRM panel bridge helper") in drm-next. > > > > This causes the following scary messages in the kernel log on Ebisu-4D: > > > > [drm:drm_bridge_attach] *ERROR* failed to attach bridge > > > Reverting this commit fixes the issue. > > Oops, that's not true (should not write tentative messages while booting > a test kernel, and press send without checking first ;-) > > Reverting the commit doesn't seem to make a difference. > But the parent 5bcc48395b9f35da ("drm: bridge: dw-hdmi: Attach to > next bridge if available") of the bad commit is fine. Thanks for the report. I've reproduced this and will send a fix shortly.
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c index 70dbbe44bb23..1b360e06658c 100644 --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c @@ -63,7 +63,6 @@ struct rcar_lvds { struct drm_bridge bridge; struct drm_bridge *next_bridge; - struct drm_connector connector; struct drm_panel *panel; void __iomem *mmio; @@ -80,73 +79,11 @@ struct rcar_lvds { #define bridge_to_rcar_lvds(b) \ container_of(b, struct rcar_lvds, bridge) -#define connector_to_rcar_lvds(c) \ - container_of(c, struct rcar_lvds, connector) - static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data) { iowrite32(data, lvds->mmio + reg); } -/* ----------------------------------------------------------------------------- - * Connector & Panel - */ - -static int rcar_lvds_connector_get_modes(struct drm_connector *connector) -{ - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); - - return drm_panel_get_modes(lvds->panel, connector); -} - -static int rcar_lvds_connector_atomic_check(struct drm_connector *connector, - struct drm_atomic_state *state) -{ - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); - const struct drm_display_mode *panel_mode; - struct drm_connector_state *conn_state; - struct drm_crtc_state *crtc_state; - - conn_state = drm_atomic_get_new_connector_state(state, connector); - if (!conn_state->crtc) - return 0; - - if (list_empty(&connector->modes)) { - dev_dbg(lvds->dev, "connector: empty modes list\n"); - return -EINVAL; - } - - panel_mode = list_first_entry(&connector->modes, - struct drm_display_mode, head); - - /* We're not allowed to modify the resolution. */ - crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc); - if (IS_ERR(crtc_state)) - return PTR_ERR(crtc_state); - - if (crtc_state->mode.hdisplay != panel_mode->hdisplay || - crtc_state->mode.vdisplay != panel_mode->vdisplay) - return -EINVAL; - - /* The flat panel mode is fixed, just copy it to the adjusted mode. */ - drm_mode_copy(&crtc_state->adjusted_mode, panel_mode); - - return 0; -} - -static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = { - .get_modes = rcar_lvds_connector_get_modes, - .atomic_check = rcar_lvds_connector_atomic_check, -}; - -static const struct drm_connector_funcs rcar_lvds_conn_funcs = { - .reset = drm_atomic_helper_connector_reset, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = drm_connector_cleanup, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, -}; - /* ----------------------------------------------------------------------------- * PLL Setup */ @@ -583,11 +520,6 @@ static void __rcar_lvds_atomic_enable(struct drm_bridge *bridge, /* Turn the output on. */ lvdcr0 |= LVDCR0_LVRES; rcar_lvds_write(lvds, LVDCR0, lvdcr0); - - if (lvds->panel) { - drm_panel_prepare(lvds->panel); - drm_panel_enable(lvds->panel); - } } static void rcar_lvds_atomic_enable(struct drm_bridge *bridge, @@ -609,11 +541,6 @@ static void rcar_lvds_atomic_disable(struct drm_bridge *bridge, { struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); - if (lvds->panel) { - drm_panel_disable(lvds->panel); - drm_panel_unprepare(lvds->panel); - } - rcar_lvds_write(lvds, LVDCR0, 0); rcar_lvds_write(lvds, LVDCR1, 0); rcar_lvds_write(lvds, LVDPLLCR, 0); @@ -648,45 +575,13 @@ static int rcar_lvds_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); - struct drm_connector *connector = &lvds->connector; - struct drm_encoder *encoder = bridge->encoder; - int ret; - /* If we have a next bridge just attach it. */ - if (lvds->next_bridge) - return drm_bridge_attach(bridge->encoder, lvds->next_bridge, - bridge, flags); - - if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { - DRM_ERROR("Fix bridge driver to make connector optional!"); - return -EINVAL; - } - - /* Otherwise if we have a panel, create a connector. */ - if (!lvds->panel) - return 0; - - ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs, - DRM_MODE_CONNECTOR_LVDS); - if (ret < 0) - return ret; - - drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs); - - ret = drm_connector_attach_encoder(connector, encoder); - if (ret < 0) - return ret; - - return 0; -} - -static void rcar_lvds_detach(struct drm_bridge *bridge) -{ + return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge, + flags); } static const struct drm_bridge_funcs rcar_lvds_bridge_ops = { .attach = rcar_lvds_attach, - .detach = rcar_lvds_detach, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, @@ -759,7 +654,7 @@ static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds) * that we are expected to generate even pixels from the primary * encoder, and odd pixels from the companion encoder. */ - if (lvds->next_bridge && lvds->next_bridge->timings && + if (lvds->next_bridge->timings && lvds->next_bridge->timings->dual_link) lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS; else @@ -811,6 +706,15 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) if (ret) goto done; + if (lvds->panel) { + lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev, + lvds->panel); + if (IS_ERR_OR_NULL(lvds->next_bridge)) { + ret = -EINVAL; + goto done; + } + } + if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) ret = rcar_lvds_parse_dt_companion(lvds);
Replace the manual panel handling with usage of the DRM panel bridge helper. This simplifies the driver, and brings support for DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> --- drivers/gpu/drm/rcar-du/rcar_lvds.c | 120 +++------------------------- 1 file changed, 12 insertions(+), 108 deletions(-)