diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1176-drm-amd-display-Fix-fclk-idle-state.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.19.8/1176-drm-amd-display-Fix-fclk-idle-state.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1176-drm-amd-display-Fix-fclk-idle-state.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1176-drm-amd-display-Fix-fclk-idle-state.patch new file mode 100644 index 00000000..63c174cc --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1176-drm-amd-display-Fix-fclk-idle-state.patch @@ -0,0 +1,43 @@ +From 791c6d490fe919366fa72e501c34353588e028ee Mon Sep 17 00:00:00 2001 +From: Roman Li <Roman.Li@amd.com> +Date: Thu, 17 Jan 2019 15:47:54 -0500 +Subject: [PATCH 1176/2940] drm/amd/display: Fix fclk idle state + +[Why] +The earlier change 'Fix 6x4K displays' led to fclk value +idling at higher DPM level. + +[How] +Apply the fix only to respective multi-display configuration. + +Signed-off-by: Roman Li <Roman.Li@amd.com> +Reviewed-by: Feifei Xu <Feifei.Xu@amd.com> +Acked-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c | 10 +++++++++- + 1 file changed, 9 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c +index 2c64333fa8f8..e164d61951ea 100644 +--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c ++++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c +@@ -624,7 +624,15 @@ static void dce11_pplib_apply_display_requirements( + dc, + context->bw.dce.sclk_khz); + +- pp_display_cfg->min_dcfclock_khz = pp_display_cfg->min_engine_clock_khz; ++ /* ++ * As workaround for >4x4K lightup set dcfclock to min_engine_clock value. ++ * This is not required for less than 5 displays, ++ * thus don't request decfclk in dc to avoid impact ++ * on power saving. ++ * ++ */ ++ pp_display_cfg->min_dcfclock_khz = (context->stream_count > 4)? ++ pp_display_cfg->min_engine_clock_khz : 0; + + pp_display_cfg->min_engine_clock_deep_sleep_khz + = context->bw.dce.sclk_deep_sleep_khz; +-- +2.17.1 + |