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drm/amd/display: Fix dc_create failure handling and 666 color depths

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[ Upstream commit 0905f32977 ]

[Why]
It is possible (but very unlikely) that constructing dc fails
before current_state is created.

We support 666 color depth in some scenarios, but this
isn't handled in get_norm_pix_clk. It uses exactly the
same pixel clock as the 888 case.

[How]
Check for non null current_state before destructing.

Add case for 666 color depth to get_norm_pix_clk to
avoid assertion.

Signed-off-by: Julian Parkin <julian.parkin@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Julian Parkin
2019-06-25 14:55:53 -04:00
committed by Greg Kroah-Hartman
parent 2961a5916c
commit 94e0d52ab7
2 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@@ -608,8 +608,10 @@ const struct dc_link_settings *dc_link_get_link_cap(
static void destruct(struct dc *dc)
{
dc_release_state(dc->current_state);
dc->current_state = NULL;
if (dc->current_state) {
dc_release_state(dc->current_state);
dc->current_state = NULL;
}
destroy_links(dc);

1
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
View File

@@ -1872,6 +1872,7 @@ static int get_norm_pix_clk(const struct dc_crtc_timing *timing)
pix_clk /= 2;
if (timing->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
switch (timing->display_color_depth) {
case COLOR_DEPTH_666:
case COLOR_DEPTH_888:
normalized_pix_clk = pix_clk;
break;