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drm/amd/display: Report stream as different on scaling change

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When scaling is enabled, our preference is to scale up to the prefered
(native) mode. This means that hardware timings will be the same across
a modeset.

Therefore, also report mode as changed if source or destination
rectangle is different.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo (Sunpeng) Li 2017-10-06 11:57:40 -04:00 committed by Alex Deucher
parent 199e458aaf
commit 9a5d9c48d8
3 changed files with 27 additions and 2 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -4428,12 +4428,13 @@ static int dm_update_crtcs_state(struct dc *dc,
}
}
if (dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream)) {
if (dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) &&
dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) {
new_crtc_state->mode_changed = false;
DRM_DEBUG_DRIVER("Mode change not required, setting mode_changed to %d",
new_crtc_state->mode_changed);
new_crtc_state->mode_changed);
}

22
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
View File

@ -1335,6 +1335,28 @@ bool dc_is_stream_unchanged(
return true;
}
bool dc_is_stream_scaling_unchanged(
struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{
if (old_stream == stream)
return true;
if (old_stream == NULL || stream == NULL)
return false;
if (memcmp(&old_stream->src,
&stream->src,
sizeof(struct rect)) != 0)
return false;
if (memcmp(&old_stream->dst,
&stream->dst,
sizeof(struct rect)) != 0)
return false;
return true;
}
/* Maximum TMDS single link pixel clock 165MHz */
#define TMDS_MAX_PIXEL_CLOCK_IN_KHZ 165000

2
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -627,6 +627,8 @@ struct dc_stream_update {
bool dc_is_stream_unchanged(
struct dc_stream_state *old_stream, struct dc_stream_state *stream);
bool dc_is_stream_scaling_unchanged(
struct dc_stream_state *old_stream, struct dc_stream_state *stream);
/*
* Set up surface attributes and associate to a stream