Some drivers whose planes only support linear layout fb do not support format
modifiers.
These drivers should support modifiers, however the DRM core should handle this
rather than open-coding in every driver.
In this patch series, these drivers expose format modifiers based on the
following suggestion[1].
On Thu, Nov 18, 2021 at 01:02:11PM +0000, Daniel Stone wrote:
> I think the best way forward here is:
> - add a new mode_config.cannot_support_modifiers flag, and enable
> this in radeon (plus any other drivers in the same boat)
> - change drm_universal_plane_init() to advertise the LINEAR modifier
> when NULL is passed as the modifier list (including installing a
> default .format_mod_supported hook)
> - remove the mode_config.allow_fb_modifiers hook and always
> advertise modifier support, unless
> mode_config.cannot_support_modifiers is set
[1] https://patchwork.kernel.org/project/linux-renesas-soc/patch/20190509054518.10781-1-etom@igel.co.jp/#24602575
v5:
* rebase to the latest master branch (5.17-rc1+)
+ "drm/plane: Make format_mod_supported truly optional" patch [2]
[2] https://patchwork.freedesktop.org/patch/467940/?series=98255&rev=3
* change default_modifiers array from non-static to static
* remove terminator in default_modifiers array
* use ARRAY_SIZE to get the format_modifier_count
* keep a sanity check in plane init func
* modify several kerneldocs
v4: https://www.spinics.net/lists/dri-devel/msg329508.html
* modify documentation for fb_modifiers_not_supported flag in kerneldoc
v3: https://www.spinics.net/lists/dri-devel/msg329102.html
* change the order as follows:
1. add fb_modifiers_not_supported flag
2. add default modifiers
3. remove allow_fb_modifiers flag
* add a conditional disable in amdgpu_dm_plane_init()
v2: https://www.spinics.net/lists/dri-devel/msg328939.html
* rebase to the latest master branch (5.16.0+)
+ "drm/plane: Make format_mod_supported truly optional" patch [2]
v1: https://www.spinics.net/lists/dri-devel/msg327352.html
* The initial patch set
Tomohito Esaki (3):
drm: introduce fb_modifiers_not_supported flag in mode_config
drm: add support modifiers for drivers whose planes only support
linear layout
drm: remove allow_fb_modifiers
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 6 ++---
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 2 ++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
drivers/gpu/drm/drm_framebuffer.c | 6 ++---
drivers/gpu/drm/drm_ioctl.c | 2 +-
drivers/gpu/drm/drm_plane.c | 23 +++++++++++--------
drivers/gpu/drm/nouveau/nouveau_display.c | 6 +++--
drivers/gpu/drm/radeon/radeon_display.c | 2 ++
.../gpu/drm/selftests/test-drm_framebuffer.c | 1 -
include/drm/drm_mode_config.h | 18 +++++----------
include/drm/drm_plane.h | 3 +++
14 files changed, 45 insertions(+), 32 deletions(-)
--
2.25.1