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-e...@igel.co.jp/#24602575 Tomohito Esaki (3): drm: add support modifiers for drivers whose planes only support linear layout drm: set fb_modifiers_not_supported flag in legacy drivers drm: replace allow_fb_modifiers with fb_modifiers_not_supported 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 + drivers/gpu/drm/drm_framebuffer.c | 6 +-- drivers/gpu/drm/drm_ioctl.c | 2 +- drivers/gpu/drm/drm_plane.c | 41 +++++++++++-------- 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 ++ 13 files changed, 54 insertions(+), 38 deletions(-) -- 2.17.1
