On Wed, Dec 2, 2020 at 4:06 PM Simon Ser <contact@xxxxxxxxxxx> wrote:
>
> Instead of silently failing the atomic check, explain what happened via
> a debug log. This makes it easier for user-space to figure out why
> something failed.
>
> Signed-off-by: Simon Ser <contact@xxxxxxxxxxx>
> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> Cc: Harry Wentland <hwentlan@xxxxxxx>
> Cc: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Applied. Thanks!
Alex
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 862a59703060..313501cc39fc 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -6068,8 +6068,10 @@ static int dm_crtc_helper_atomic_check(struct drm_crtc *crtc,
> * userspace which stops using the HW cursor altogether in response to the resulting EINVAL.
> */
> if (crtc_state->enable &&
> - !(crtc_state->plane_mask & drm_plane_mask(crtc->primary)))
> + !(crtc_state->plane_mask & drm_plane_mask(crtc->primary))) {
> + DRM_DEBUG_ATOMIC("Can't enable a CRTC without enabling the primary plane\n");
> return -EINVAL;
> + }
>
> /* In some use cases, like reset, no stream is attached */
> if (!dm_crtc_state->stream)
> @@ -6078,6 +6080,7 @@ static int dm_crtc_helper_atomic_check(struct drm_crtc *crtc,
> if (dc_validate_stream(dc, dm_crtc_state->stream) == DC_OK)
> return 0;
>
> + DRM_DEBUG_ATOMIC("Failed DC stream validation\n");
> return ret;
> }
>
> --
> 2.29.2
>
>
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