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

[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>
This commit is contained in:
Julian Parkin 2019-06-25 14:55:53 -04:00 committed by Alex Deucher
parent 67fd6c0d2d
commit 0905f32977
2 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -502,8 +502,10 @@ void dc_stream_set_static_screen_events(struct dc *dc,
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

@ -1839,6 +1839,7 @@ 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;