diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3948-drm-amd-display-Only-program-MSA_TIMING_PARAM-if-it-.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3948-drm-amd-display-Only-program-MSA_TIMING_PARAM-if-it-.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3948-drm-amd-display-Only-program-MSA_TIMING_PARAM-if-it-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3948-drm-amd-display-Only-program-MSA_TIMING_PARAM-if-it-.patch new file mode 100644 index 00000000..f34ba264 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3948-drm-amd-display-Only-program-MSA_TIMING_PARAM-if-it-.patch @@ -0,0 +1,46 @@ +From 7d43ed29844f8858cd8e0855cc4c5240cdd0e15c Mon Sep 17 00:00:00 2001 +From: Anthony Koo <Anthony.Koo@amd.com> +Date: Thu, 15 Mar 2018 14:54:30 -0400 +Subject: [PATCH 3948/4131] drm/amd/display: Only program MSA_TIMING_PARAM if + it changed + +Signed-off-by: Harry Wentland <harry.wentland@amd.com> +Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> +--- + drivers/gpu/drm/amd/display/dc/core/dc_link.c | 15 ++++++++++----- + 1 file changed, 10 insertions(+), 5 deletions(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c +index 65f2ce9b..e612841 100644 +--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c ++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c +@@ -1183,16 +1183,21 @@ static void enable_stream_features(struct pipe_ctx *pipe_ctx) + { + struct dc_stream_state *stream = pipe_ctx->stream; + struct dc_link *link = stream->sink->link; +- union down_spread_ctrl downspread; ++ union down_spread_ctrl old_downspread; ++ union down_spread_ctrl new_downspread; + + core_link_read_dpcd(link, DP_DOWNSPREAD_CTRL, +- &downspread.raw, sizeof(downspread)); ++ &old_downspread.raw, sizeof(old_downspread)); + +- downspread.bits.IGNORE_MSA_TIMING_PARAM = ++ new_downspread.raw = old_downspread.raw; ++ ++ new_downspread.bits.IGNORE_MSA_TIMING_PARAM = + (stream->ignore_msa_timing_param) ? 1 : 0; + +- core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL, +- &downspread.raw, sizeof(downspread)); ++ if (new_downspread.raw != old_downspread.raw) { ++ core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL, ++ &new_downspread.raw, sizeof(new_downspread)); ++ } + } + + static enum dc_status enable_link_dp( +-- +2.7.4 + |