UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/amd/display: Red screen observed on startup 

[Why]
We try to to change new_clocks->dppclk_khz to 100000 when
new_clocks->dppclk_khz is 0

[How]
Don't change new_clocks->dppclk_khz value when new_clocks->dppclk_khz is
0

Signed-off-by: Peikang Zhang <peikang.zhang@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Peikang Zhang 2020-06-08 14:28:35 -04:00 committed by Alex Deucher
parent 5e90801298
commit 3c08d625d6
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
View File

@ -153,8 +153,9 @@ void rn_update_clocks(struct clk_mgr *clk_mgr_base,
}
// workaround: Limit dppclk to 100Mhz to avoid lower eDP panel switch to plus 4K monitor underflow.
// Do not adjust dppclk if dppclk is 0 to avoid unexpected result
if (!IS_DIAG_DC(dc->ctx->dce_environment)) {
if (new_clocks->dppclk_khz < 100000)
if (new_clocks->dppclk_khz < 100000 && new_clocks->dppclk_khz > 0)
new_clocks->dppclk_khz = 100000;
}