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Subject[PATCH 4.18 167/197] drm/amd/display: Use requested HDMI aspect ratio
Date
4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Leo (Sunpeng) Li <sunpeng.li@amd.com>

commit e11d41472a50742c16d53c968e143fb498fa482f upstream.

[Why]
The DRM mode's HDMI picture aspect ratio field was never saved in
dc_stream's timing struct. This causes us to mistake a new stream to
have the same timings as the old, even though the user has requested a
different aspect ratio.

[How]
Save DRM's aspect ratio field within dc_stream's timing struct.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=107153
Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2124,13 +2124,8 @@ convert_color_depth_from_display_info(co
static enum dc_aspect_ratio
get_aspect_ratio(const struct drm_display_mode *mode_in)
{
- int32_t width = mode_in->crtc_hdisplay * 9;
- int32_t height = mode_in->crtc_vdisplay * 16;
-
- if ((width - height) < 10 && (width - height) > -10)
- return ASPECT_RATIO_16_9;
- else
- return ASPECT_RATIO_4_3;
+ /* 1-1 mapping, since both enums follow the HDMI spec. */
+ return (enum dc_aspect_ratio) mode_in->picture_aspect_ratio;
}

static enum dc_color_space

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