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drm/amd/display: Do not program front-end twice

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The sequence of front-end > back-end > front-end programming will
program the front-end more than once. Add a mode_changed flag, and use
it to determine whether the front-end should be programmed before, or
after back-end.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo (Sunpeng) Li
2017-11-10 16:12:08 -05:00
committed by Alex Deucher
parent 000b59ea9f
commit 27b3f4fc91
3 changed files with 32 additions and 3 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -4009,6 +4009,19 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
}
}
/**
* amdgpu_dm_crtc_copy_transient_flags - copy mirrored flags from DRM to DC
* @crtc_state: the DRM CRTC state
* @stream_state: the DC stream state.
*
* Copy the mirrored transient state flags from DRM, to DC. It is used to bring
* a dc_stream_state's flags in sync with a drm_crtc_state's flags.
*/
static void amdgpu_dm_crtc_copy_transient_flags(struct drm_crtc_state *crtc_state,
struct dc_stream_state *stream_state)
{
stream_state->mode_changed = crtc_state->mode_changed;
}
static int amdgpu_dm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
@@ -4079,6 +4092,12 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
new_crtc_state->active_changed,
new_crtc_state->connectors_changed);
/* Copy all transient state flags into dc state */
if (dm_new_crtc_state->stream) {
amdgpu_dm_crtc_copy_transient_flags(&dm_new_crtc_state->base,
dm_new_crtc_state->stream);
}
/* handles headless hotplug case, updating new_state and
* aconnector as needed
*/
@@ -4563,6 +4582,7 @@ static int dm_update_crtcs_state(struct dc *dc,
WARN_ON(dm_new_crtc_state->stream);
dm_new_crtc_state->stream = new_stream;
dc_stream_retain(new_stream);
DRM_DEBUG_DRIVER("Enabling DRM crtc: %d\n",