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drm/amd/display: add debug logs for dm_crtc_helper_atomic_check

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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@emersion.fr>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Simon Ser 2020-12-02 17:38:46 -05:00 • committed by Alex Deucher
parent 22ca75ea6a
commit ea9522f5e5
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -6071,8 +6071,10 @@ 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)
@ -6081,6 +6083,7 @@ 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;
}