diff options
| author | Peikang Zhang <peikang.zhang@amd.com> | 2020-06-08 21:28:35 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-01 08:59:26 +0300 |
| commit | 3c08d625d6c456fa34dd32e2ae14911ccdfa8c85 (patch) | |
| tree | 6122e2e6c4ef40c66c7c4997d421c9a8063944f7 /drivers/gpu/drm/amd/display/dc/clk_mgr | |
| parent | 5e90801298cc5c7ac7fac7d5fb0705e7bedf1eea (diff) | |
| download | linux-3c08d625d6c456fa34dd32e2ae14911ccdfa8c85.tar.xz | |
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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index 24c5765890fa..39788a7bd003 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -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; } |