drm_dev_register() sets connector->registration_state to
DRM_CONNECTOR_REGISTERED and dev->registered to true. If
drm_connector_set_panel_orientation() is first called after
drm_dev_register(), it will fail several checks and results in following
warning. So set panel orientation in dsi before drm_dev_register() is
called.
[ 4.480976] ------------[ cut here ]------------
[ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
<snip>
[ 4.609772] Call trace:
[ 4.612208] __drm_mode_object_add+0xb4/0xbc
[ 4.616466] drm_mode_object_add+0x20/0x2c
[ 4.620552] drm_property_create+0xdc/0x174
[ 4.624723] drm_property_create_enum+0x34/0x98
[ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
[ 4.634716] boe_panel_get_modes+0x88/0xd8
[ 4.638802] drm_panel_get_modes+0x2c/0x48
[ 4.642887] panel_bridge_get_modes+0x1c/0x28
[ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
[ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
[ 4.658266] drm_mode_getconnector+0x1b4/0x45c
[ 4.662699] drm_ioctl_kernel+0xac/0x128
[ 4.666611] drm_ioctl+0x268/0x410
[ 4.670002] drm_compat_ioctl+0xdc/0xf0
[ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
[ 4.678436] el0_svc_common+0xf4/0x1c0
[ 4.682174] do_el0_svc_compat+0x28/0x3c
[ 4.686088] el0_svc_compat+0x10/0x1c
[ 4.689738] el0_sync_compat_handler+0xa8/0xcc
[ 4.694171] el0_sync_compat+0x178/0x180
[ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
[ 4.702721] ------------[ cut here ]------------
[ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
<snip>
[ 4.833830] Call trace:
[ 4.836266] drm_object_attach_property+0x48/0xb8
[ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
[ 4.846432] boe_panel_get_modes+0x88/0xd8
[ 4.850516] drm_panel_get_modes+0x2c/0x48
[ 4.854600] panel_bridge_get_modes+0x1c/0x28
[ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
[ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
[ 4.869978] drm_mode_getconnector+0x1b4/0x45c
[ 4.874410] drm_ioctl_kernel+0xac/0x128
[ 4.878320] drm_ioctl+0x268/0x410
[ 4.881711] drm_compat_ioctl+0xdc/0xf0
[ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
[ 4.890142] el0_svc_common+0xf4/0x1c0
[ 4.893879] do_el0_svc_compat+0x28/0x3c
[ 4.897791] el0_svc_compat+0x10/0x1c
[ 4.901441] el0_sync_compat_handler+0xa8/0xcc
[ 4.905873] el0_sync_compat+0x178/0x180
[ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
Signed-off-by: Hsin-Yi Wang <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index ae403c67cbd9..45a702ee09f3 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -205,6 +205,7 @@ struct mtk_dsi {
u32 irq_data;
wait_queue_head_t irq_wait_queue;
const struct mtk_dsi_driver_data *driver_data;
+ enum drm_panel_orientation orientation;
};
static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
@@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
}
drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
+ drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
+
return 0;
err_cleanup_encoder:
@@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
ret = PTR_ERR(dsi->next_bridge);
goto err_unregister_host;
}
+
+ ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
+ if (ret) {
+ dev_err(dev, "failed to get panel orientation %d\n", ret);
+ return ret;
+ }
}
dsi->driver_data = of_device_get_match_data(dev);
--
2.31.1.295.g9ea45b61b8-goog
krane, kakadu, and kodama boards have a default panel rotation.
Signed-off-by: Hsin-Yi Wang <[email protected]>
---
arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index ff56bcfa3370..793cc9501337 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -263,6 +263,7 @@ panel: panel@0 {
avee-supply = <&ppvarp_lcd>;
pp1800-supply = <&pp1800_lcd>;
backlight = <&backlight_lcd0>;
+ rotation = <270>;
port {
panel_in: endpoint {
remote-endpoint = <&dsi_out>;
--
2.31.1.295.g9ea45b61b8-goog
On Fri, Apr 9, 2021 at 12:53 PM Hsin-Yi Wang <[email protected]> wrote:
>
> drm_dev_register() sets connector->registration_state to
> DRM_CONNECTOR_REGISTERED and dev->registered to true. If
> drm_connector_set_panel_orientation() is first called after
> drm_dev_register(), it will fail several checks and results in following
> warning. So set panel orientation in dsi before drm_dev_register() is
> called.
>
> [ 4.480976] ------------[ cut here ]------------
> [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
> <snip>
> [ 4.609772] Call trace:
> [ 4.612208] __drm_mode_object_add+0xb4/0xbc
> [ 4.616466] drm_mode_object_add+0x20/0x2c
> [ 4.620552] drm_property_create+0xdc/0x174
> [ 4.624723] drm_property_create_enum+0x34/0x98
> [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
> [ 4.634716] boe_panel_get_modes+0x88/0xd8
> [ 4.638802] drm_panel_get_modes+0x2c/0x48
> [ 4.642887] panel_bridge_get_modes+0x1c/0x28
> [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
> [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
> [ 4.658266] drm_mode_getconnector+0x1b4/0x45c
> [ 4.662699] drm_ioctl_kernel+0xac/0x128
> [ 4.666611] drm_ioctl+0x268/0x410
> [ 4.670002] drm_compat_ioctl+0xdc/0xf0
> [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
> [ 4.678436] el0_svc_common+0xf4/0x1c0
> [ 4.682174] do_el0_svc_compat+0x28/0x3c
> [ 4.686088] el0_svc_compat+0x10/0x1c
> [ 4.689738] el0_sync_compat_handler+0xa8/0xcc
> [ 4.694171] el0_sync_compat+0x178/0x180
> [ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
> [ 4.702721] ------------[ cut here ]------------
> [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
> <snip>
> [ 4.833830] Call trace:
> [ 4.836266] drm_object_attach_property+0x48/0xb8
> [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
> [ 4.846432] boe_panel_get_modes+0x88/0xd8
> [ 4.850516] drm_panel_get_modes+0x2c/0x48
> [ 4.854600] panel_bridge_get_modes+0x1c/0x28
> [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
> [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
> [ 4.869978] drm_mode_getconnector+0x1b4/0x45c
> [ 4.874410] drm_ioctl_kernel+0xac/0x128
> [ 4.878320] drm_ioctl+0x268/0x410
> [ 4.881711] drm_compat_ioctl+0xdc/0xf0
> [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
> [ 4.890142] el0_svc_common+0xf4/0x1c0
> [ 4.893879] do_el0_svc_compat+0x28/0x3c
> [ 4.897791] el0_svc_compat+0x10/0x1c
> [ 4.901441] el0_sync_compat_handler+0xa8/0xcc
> [ 4.905873] el0_sync_compat+0x178/0x180
> [ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
>
> Signed-off-by: Hsin-Yi Wang <[email protected]>
ping on the thread, thanks.
> ---
> drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index ae403c67cbd9..45a702ee09f3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -205,6 +205,7 @@ struct mtk_dsi {
> u32 irq_data;
> wait_queue_head_t irq_wait_queue;
> const struct mtk_dsi_driver_data *driver_data;
> + enum drm_panel_orientation orientation;
> };
>
> static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
> @@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
> }
> drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>
> + drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
> +
> return 0;
>
> err_cleanup_encoder:
> @@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
> ret = PTR_ERR(dsi->next_bridge);
> goto err_unregister_host;
> }
> +
> + ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
> + if (ret) {
> + dev_err(dev, "failed to get panel orientation %d\n", ret);
> + return ret;
> + }
> }
>
> dsi->driver_data = of_device_get_match_data(dev);
> --
> 2.31.1.295.g9ea45b61b8-goog
>
Hi, Hsin-Yi:
Hsin-Yi Wang <[email protected]> 於 2021年4月20日 週二 下午5:05寫道：
>
> On Fri, Apr 9, 2021 at 12:53 PM Hsin-Yi Wang <[email protected]> wrote:
> >
> > drm_dev_register() sets connector->registration_state to
> > DRM_CONNECTOR_REGISTERED and dev->registered to true. If
> > drm_connector_set_panel_orientation() is first called after
> > drm_dev_register(), it will fail several checks and results in following
> > warning. So set panel orientation in dsi before drm_dev_register() is
> > called.
All connector would have this problem, so I would like to fix this in
common code.
In drm_connector_init(), you could add "panel orientation" property
with value DRM_MODE_PANEL_ORIENTATION_UNKNOWN, so it would not add new
object when get modes.
Regards,
Chun-Kuang.
> >
> > [ 4.480976] ------------[ cut here ]------------
> > [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
> > <snip>
> > [ 4.609772] Call trace:
> > [ 4.612208] __drm_mode_object_add+0xb4/0xbc
> > [ 4.616466] drm_mode_object_add+0x20/0x2c
> > [ 4.620552] drm_property_create+0xdc/0x174
> > [ 4.624723] drm_property_create_enum+0x34/0x98
> > [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
> > [ 4.634716] boe_panel_get_modes+0x88/0xd8
> > [ 4.638802] drm_panel_get_modes+0x2c/0x48
> > [ 4.642887] panel_bridge_get_modes+0x1c/0x28
> > [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
> > [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
> > [ 4.658266] drm_mode_getconnector+0x1b4/0x45c
> > [ 4.662699] drm_ioctl_kernel+0xac/0x128
> > [ 4.666611] drm_ioctl+0x268/0x410
> > [ 4.670002] drm_compat_ioctl+0xdc/0xf0
> > [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
> > [ 4.678436] el0_svc_common+0xf4/0x1c0
> > [ 4.682174] do_el0_svc_compat+0x28/0x3c
> > [ 4.686088] el0_svc_compat+0x10/0x1c
> > [ 4.689738] el0_sync_compat_handler+0xa8/0xcc
> > [ 4.694171] el0_sync_compat+0x178/0x180
> > [ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
> > [ 4.702721] ------------[ cut here ]------------
> > [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
> > <snip>
> > [ 4.833830] Call trace:
> > [ 4.836266] drm_object_attach_property+0x48/0xb8
> > [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
> > [ 4.846432] boe_panel_get_modes+0x88/0xd8
> > [ 4.850516] drm_panel_get_modes+0x2c/0x48
> > [ 4.854600] panel_bridge_get_modes+0x1c/0x28
> > [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
> > [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
> > [ 4.869978] drm_mode_getconnector+0x1b4/0x45c
> > [ 4.874410] drm_ioctl_kernel+0xac/0x128
> > [ 4.878320] drm_ioctl+0x268/0x410
> > [ 4.881711] drm_compat_ioctl+0xdc/0xf0
> > [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
> > [ 4.890142] el0_svc_common+0xf4/0x1c0
> > [ 4.893879] do_el0_svc_compat+0x28/0x3c
> > [ 4.897791] el0_svc_compat+0x10/0x1c
> > [ 4.901441] el0_sync_compat_handler+0xa8/0xcc
> > [ 4.905873] el0_sync_compat+0x178/0x180
> > [ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
> >
> > Signed-off-by: Hsin-Yi Wang <[email protected]>
>
> ping on the thread, thanks.
>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > index ae403c67cbd9..45a702ee09f3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > @@ -205,6 +205,7 @@ struct mtk_dsi {
> > u32 irq_data;
> > wait_queue_head_t irq_wait_queue;
> > const struct mtk_dsi_driver_data *driver_data;
> > + enum drm_panel_orientation orientation;
> > };
> >
> > static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
> > @@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
> > }
> > drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
> >
> > + drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
> > +
> > return 0;
> >
> > err_cleanup_encoder:
> > @@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
> > ret = PTR_ERR(dsi->next_bridge);
> > goto err_unregister_host;
> > }
> > +
> > + ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
> > + if (ret) {
> > + dev_err(dev, "failed to get panel orientation %d\n", ret);
> > + return ret;
> > + }
> > }
> >
> > dsi->driver_data = of_device_get_match_data(dev);
> > --
> > 2.31.1.295.g9ea45b61b8-goog
> >
On Wed, Apr 21, 2021 at 7:47 AM Chun-Kuang Hu <[email protected]> wrote:
>
> Hi, Hsin-Yi:
>
> Hsin-Yi Wang <[email protected]> 於 2021年4月20日 週二 下午5:05寫道：
> >
> > On Fri, Apr 9, 2021 at 12:53 PM Hsin-Yi Wang <[email protected]> wrote:
> > >
> > > drm_dev_register() sets connector->registration_state to
> > > DRM_CONNECTOR_REGISTERED and dev->registered to true. If
> > > drm_connector_set_panel_orientation() is first called after
> > > drm_dev_register(), it will fail several checks and results in following
> > > warning. So set panel orientation in dsi before drm_dev_register() is
> > > called.
>
> All connector would have this problem, so I would like to fix this in
> common code.
> In drm_connector_init(), you could add "panel orientation" property
> with value DRM_MODE_PANEL_ORIENTATION_UNKNOWN, so it would not add new
> object when get modes.
Hi CK,
Calling drm_connector_set_panel_orientation() with
DRM_MODE_PANEL_ORIENTATION_UNKNOWN will be a no-op. And once the
orientation is set, the 2nd call to this is also no-op.
https://elixir.bootlin.com/linux/v5.12-rc8/source/drivers/gpu/drm/drm_connector.c#L2182
The 1st time call to drm_connector_set_panel_orientation() has to be
prior than drm_dev_register().
Orientation is an optional property, and different dsi has different
ways to read and handle this. Eg. vlv_dsi[1], intel_dp[2], so I think
it's better to let each connector decide how to handle orientation.
[1] https://elixir.bootlin.com/linux/v5.12-rc8/source/drivers/gpu/drm/i915/display/vlv_dsi.c#L1632
[2] https://elixir.bootlin.com/linux/v5.12-rc8/source/drivers/gpu/drm/i915/display/intel_dp.c#L6488
Thanks
>
> Regards,
> Chun-Kuang.
>
> > >
> > > [ 4.480976] ------------[ cut here ]------------
> > > [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
> > > <snip>
> > > [ 4.609772] Call trace:
> > > [ 4.612208] __drm_mode_object_add+0xb4/0xbc
> > > [ 4.616466] drm_mode_object_add+0x20/0x2c
> > > [ 4.620552] drm_property_create+0xdc/0x174
> > > [ 4.624723] drm_property_create_enum+0x34/0x98
> > > [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
> > > [ 4.634716] boe_panel_get_modes+0x88/0xd8
> > > [ 4.638802] drm_panel_get_modes+0x2c/0x48
> > > [ 4.642887] panel_bridge_get_modes+0x1c/0x28
> > > [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
> > > [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
> > > [ 4.658266] drm_mode_getconnector+0x1b4/0x45c
> > > [ 4.662699] drm_ioctl_kernel+0xac/0x128
> > > [ 4.666611] drm_ioctl+0x268/0x410
> > > [ 4.670002] drm_compat_ioctl+0xdc/0xf0
> > > [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
> > > [ 4.678436] el0_svc_common+0xf4/0x1c0
> > > [ 4.682174] do_el0_svc_compat+0x28/0x3c
> > > [ 4.686088] el0_svc_compat+0x10/0x1c
> > > [ 4.689738] el0_sync_compat_handler+0xa8/0xcc
> > > [ 4.694171] el0_sync_compat+0x178/0x180
> > > [ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
> > > [ 4.702721] ------------[ cut here ]------------
> > > [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
> > > <snip>
> > > [ 4.833830] Call trace:
> > > [ 4.836266] drm_object_attach_property+0x48/0xb8
> > > [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
> > > [ 4.846432] boe_panel_get_modes+0x88/0xd8
> > > [ 4.850516] drm_panel_get_modes+0x2c/0x48
> > > [ 4.854600] panel_bridge_get_modes+0x1c/0x28
> > > [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
> > > [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
> > > [ 4.869978] drm_mode_getconnector+0x1b4/0x45c
> > > [ 4.874410] drm_ioctl_kernel+0xac/0x128
> > > [ 4.878320] drm_ioctl+0x268/0x410
> > > [ 4.881711] drm_compat_ioctl+0xdc/0xf0
> > > [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
> > > [ 4.890142] el0_svc_common+0xf4/0x1c0
> > > [ 4.893879] do_el0_svc_compat+0x28/0x3c
> > > [ 4.897791] el0_svc_compat+0x10/0x1c
> > > [ 4.901441] el0_sync_compat_handler+0xa8/0xcc
> > > [ 4.905873] el0_sync_compat+0x178/0x180
> > > [ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
> > >
> > > Signed-off-by: Hsin-Yi Wang <[email protected]>
> >
> > ping on the thread, thanks.
> >
> > > ---
> > > drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
> > > 1 file changed, 9 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > > index ae403c67cbd9..45a702ee09f3 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > > @@ -205,6 +205,7 @@ struct mtk_dsi {
> > > u32 irq_data;
> > > wait_queue_head_t irq_wait_queue;
> > > const struct mtk_dsi_driver_data *driver_data;
> > > + enum drm_panel_orientation orientation;
> > > };
> > >
> > > static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
> > > @@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
> > > }
> > > drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
> > >
> > > + drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
> > > +
> > > return 0;
> > >
> > > err_cleanup_encoder:
> > > @@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
> > > ret = PTR_ERR(dsi->next_bridge);
> > > goto err_unregister_host;
> > > }
> > > +
> > > + ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
> > > + if (ret) {
> > > + dev_err(dev, "failed to get panel orientation %d\n", ret);
> > > + return ret;
> > > + }
> > > }
> > >
> > > dsi->driver_data = of_device_get_match_data(dev);
> > > --
> > > 2.31.1.295.g9ea45b61b8-goog
> > >
On Fri, Apr 9, 2021 at 12:53 AM Hsin-Yi Wang <[email protected]> wrote:
>
> drm_dev_register() sets connector->registration_state to
> DRM_CONNECTOR_REGISTERED and dev->registered to true. If
> drm_connector_set_panel_orientation() is first called after
> drm_dev_register(), it will fail several checks and results in following
> warning. So set panel orientation in dsi before drm_dev_register() is
> called.
>
> [ 4.480976] ------------[ cut here ]------------
> [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
> <snip>
> [ 4.609772] Call trace:
> [ 4.612208] __drm_mode_object_add+0xb4/0xbc
> [ 4.616466] drm_mode_object_add+0x20/0x2c
> [ 4.620552] drm_property_create+0xdc/0x174
> [ 4.624723] drm_property_create_enum+0x34/0x98
> [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
> [ 4.634716] boe_panel_get_modes+0x88/0xd8
> [ 4.638802] drm_panel_get_modes+0x2c/0x48
> [ 4.642887] panel_bridge_get_modes+0x1c/0x28
> [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
> [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
> [ 4.658266] drm_mode_getconnector+0x1b4/0x45c
> [ 4.662699] drm_ioctl_kernel+0xac/0x128
> [ 4.666611] drm_ioctl+0x268/0x410
> [ 4.670002] drm_compat_ioctl+0xdc/0xf0
> [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
> [ 4.678436] el0_svc_common+0xf4/0x1c0
> [ 4.682174] do_el0_svc_compat+0x28/0x3c
> [ 4.686088] el0_svc_compat+0x10/0x1c
> [ 4.689738] el0_sync_compat_handler+0xa8/0xcc
> [ 4.694171] el0_sync_compat+0x178/0x180
> [ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
> [ 4.702721] ------------[ cut here ]------------
> [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
> <snip>
> [ 4.833830] Call trace:
> [ 4.836266] drm_object_attach_property+0x48/0xb8
> [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
> [ 4.846432] boe_panel_get_modes+0x88/0xd8
> [ 4.850516] drm_panel_get_modes+0x2c/0x48
> [ 4.854600] panel_bridge_get_modes+0x1c/0x28
> [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
> [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
> [ 4.869978] drm_mode_getconnector+0x1b4/0x45c
> [ 4.874410] drm_ioctl_kernel+0xac/0x128
> [ 4.878320] drm_ioctl+0x268/0x410
> [ 4.881711] drm_compat_ioctl+0xdc/0xf0
> [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
> [ 4.890142] el0_svc_common+0xf4/0x1c0
> [ 4.893879] do_el0_svc_compat+0x28/0x3c
> [ 4.897791] el0_svc_compat+0x10/0x1c
> [ 4.901441] el0_sync_compat_handler+0xa8/0xcc
> [ 4.905873] el0_sync_compat+0x178/0x180
> [ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
>
> Signed-off-by: Hsin-Yi Wang <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index ae403c67cbd9..45a702ee09f3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -205,6 +205,7 @@ struct mtk_dsi {
> u32 irq_data;
> wait_queue_head_t irq_wait_queue;
> const struct mtk_dsi_driver_data *driver_data;
> + enum drm_panel_orientation orientation;
> };
>
> static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
> @@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
> }
> drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>
> + drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
> +
> return 0;
>
> err_cleanup_encoder:
> @@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
> ret = PTR_ERR(dsi->next_bridge);
> goto err_unregister_host;
> }
> +
> + ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
> + if (ret) {
> + dev_err(dev, "failed to get panel orientation %d\n", ret);
> + return ret;
> + }
I don't think this is the right place to mine orientation since it
duplicates the call from the panel driver.
Instead, how about splitting out
property_create_enum/attach_orientation_property from
set_panel_orientation such that you can attach the property (with
UNKNOWN value) in the connector init and then leave the panel to set
it properly in get_modes (I kind of disagree with populating this in
get_modes as well, but I don't think there's anywhere else to stick it
right now)?
AFAICT orientation is the only property which has the create/attach
calls in the set function which seems like a perfect recipe for this
type of failure.
Sean
> }
>
> dsi->driver_data = of_device_get_match_data(dev);
> --
> 2.31.1.295.g9ea45b61b8-goog
>
On Fri, Apr 23, 2021 at 9:53 PM Sean Paul <[email protected]> wrote:
>
> On Fri, Apr 9, 2021 at 12:53 AM Hsin-Yi Wang <[email protected]> wrote:
> >
> > drm_dev_register() sets connector->registration_state to
> > DRM_CONNECTOR_REGISTERED and dev->registered to true. If
> > drm_connector_set_panel_orientation() is first called after
> > drm_dev_register(), it will fail several checks and results in following
> > warning. So set panel orientation in dsi before drm_dev_register() is
> > called.
> >
> > [ 4.480976] ------------[ cut here ]------------
> > [ 4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
> > <snip>
> > [ 4.609772] Call trace:
> > [ 4.612208] __drm_mode_object_add+0xb4/0xbc
> > [ 4.616466] drm_mode_object_add+0x20/0x2c
> > [ 4.620552] drm_property_create+0xdc/0x174
> > [ 4.624723] drm_property_create_enum+0x34/0x98
> > [ 4.629241] drm_connector_set_panel_orientation+0x64/0xa0
> > [ 4.634716] boe_panel_get_modes+0x88/0xd8
> > [ 4.638802] drm_panel_get_modes+0x2c/0x48
> > [ 4.642887] panel_bridge_get_modes+0x1c/0x28
> > [ 4.647233] drm_bridge_connector_get_modes+0xa0/0xd4
> > [ 4.652273] drm_helper_probe_single_connector_modes+0x218/0x700
> > [ 4.658266] drm_mode_getconnector+0x1b4/0x45c
> > [ 4.662699] drm_ioctl_kernel+0xac/0x128
> > [ 4.666611] drm_ioctl+0x268/0x410
> > [ 4.670002] drm_compat_ioctl+0xdc/0xf0
> > [ 4.673829] __arm64_compat_sys_ioctl+0xc8/0x100
> > [ 4.678436] el0_svc_common+0xf4/0x1c0
> > [ 4.682174] do_el0_svc_compat+0x28/0x3c
> > [ 4.686088] el0_svc_compat+0x10/0x1c
> > [ 4.689738] el0_sync_compat_handler+0xa8/0xcc
> > [ 4.694171] el0_sync_compat+0x178/0x180
> > [ 4.698082] ---[ end trace b4f2db9d9c88610b ]---
> > [ 4.702721] ------------[ cut here ]------------
> > [ 4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
> > <snip>
> > [ 4.833830] Call trace:
> > [ 4.836266] drm_object_attach_property+0x48/0xb8
> > [ 4.840958] drm_connector_set_panel_orientation+0x84/0xa0
> > [ 4.846432] boe_panel_get_modes+0x88/0xd8
> > [ 4.850516] drm_panel_get_modes+0x2c/0x48
> > [ 4.854600] panel_bridge_get_modes+0x1c/0x28
> > [ 4.858946] drm_bridge_connector_get_modes+0xa0/0xd4
> > [ 4.863984] drm_helper_probe_single_connector_modes+0x218/0x700
> > [ 4.869978] drm_mode_getconnector+0x1b4/0x45c
> > [ 4.874410] drm_ioctl_kernel+0xac/0x128
> > [ 4.878320] drm_ioctl+0x268/0x410
> > [ 4.881711] drm_compat_ioctl+0xdc/0xf0
> > [ 4.885536] __arm64_compat_sys_ioctl+0xc8/0x100
> > [ 4.890142] el0_svc_common+0xf4/0x1c0
> > [ 4.893879] do_el0_svc_compat+0x28/0x3c
> > [ 4.897791] el0_svc_compat+0x10/0x1c
> > [ 4.901441] el0_sync_compat_handler+0xa8/0xcc
> > [ 4.905873] el0_sync_compat+0x178/0x180
> > [ 4.909783] ---[ end trace b4f2db9d9c88610c ]---
> >
> > Signed-off-by: Hsin-Yi Wang <[email protected]>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dsi.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > index ae403c67cbd9..45a702ee09f3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > @@ -205,6 +205,7 @@ struct mtk_dsi {
> > u32 irq_data;
> > wait_queue_head_t irq_wait_queue;
> > const struct mtk_dsi_driver_data *driver_data;
> > + enum drm_panel_orientation orientation;
> > };
> >
> > static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
> > @@ -966,6 +967,8 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
> > }
> > drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
> >
> > + drm_connector_set_panel_orientation(dsi->connector, dsi->orientation);
> > +
> > return 0;
> >
> > err_cleanup_encoder:
> > @@ -1029,6 +1032,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
> > ret = PTR_ERR(dsi->next_bridge);
> > goto err_unregister_host;
> > }
> > +
> > + ret = of_drm_get_panel_orientation(panel->dev->of_node, &dsi->orientation);
> > + if (ret) {
> > + dev_err(dev, "failed to get panel orientation %d\n", ret);
> > + return ret;
> > + }
>
> I don't think this is the right place to mine orientation since it
> duplicates the call from the panel driver.
>
> Instead, how about splitting out
> property_create_enum/attach_orientation_property from
> set_panel_orientation such that you can attach the property (with
> UNKNOWN value) in the connector init and then leave the panel to set
> it properly in get_modes (I kind of disagree with populating this in
> get_modes as well, but I don't think there's anywhere else to stick it
> right now)?
>
> AFAICT orientation is the only property which has the create/attach
> calls in the set function which seems like a perfect recipe for this
> type of failure.
>
>
> Sean
>
Thanks for the review. It is updated in v2.
> > }
> >
> > dsi->driver_data = of_device_get_match_data(dev);
> > --
> > 2.31.1.295.g9ea45b61b8-goog
> >