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Subject[PATCH v2 1/2] gpu: drm: init set panel orientation property earlier
Date
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.

Create panel orientation property in drm_connector_init()
and set default value to UNKNOWN. Let the panel set the real value
later.

[ 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 <hsinyi@chromium.org>
---
v1:
https://patchwork.kernel.org/project/linux-mediatek/patch/20210409045314.3420733-1-hsinyi@chromium.org/
---
drivers/gpu/drm/drm_connector.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 7631f76e7f34..a1acb4af0ef4 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -303,6 +303,10 @@ int drm_connector_init(struct drm_device *dev,
config->tile_property,
0);

+ drm_object_attach_property(&connector->base,
+ config->panel_orientation_property,
+ DRM_MODE_PANEL_ORIENTATION_UNKNOWN);
+
if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
}
@@ -1210,7 +1214,7 @@ static const struct drm_prop_enum_list dp_colorspaces[] = {
* INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
* coordinates, so if userspace rotates the picture to adjust for
* the orientation it must also apply the same transformation to the
- * touchscreen input coordinates. This property is initialized by calling
+ * touchscreen input coordinates. This property value is set by calling
* drm_connector_set_panel_orientation() or
* drm_connector_set_panel_orientation_with_quirk()
*
@@ -1298,6 +1302,14 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
return -ENOMEM;
dev->mode_config.hdr_output_metadata_property = prop;

+ prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+ "panel orientation",
+ drm_panel_orientation_enum_list,
+ ARRAY_SIZE(drm_panel_orientation_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.panel_orientation_property = prop;
+
return 0;
}

@@ -2205,19 +2217,9 @@ int drm_connector_set_panel_orientation(
info->panel_orientation = panel_orientation;

prop = dev->mode_config.panel_orientation_property;
- if (!prop) {
- prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
- "panel orientation",
- drm_panel_orientation_enum_list,
- ARRAY_SIZE(drm_panel_orientation_enum_list));
- if (!prop)
- return -ENOMEM;
-
- dev->mode_config.panel_orientation_property = prop;
- }

- drm_object_attach_property(&connector->base, prop,
- info->panel_orientation);
+ drm_object_property_set_value(&connector->base, prop,
+ info->panel_orientation);
return 0;
}
EXPORT_SYMBOL(drm_connector_set_panel_orientation);
--
2.31.1.498.g6c1eba8ee3d-goog
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