Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by
Anthony Koo
and committed by
Alex Deucher
87943159
5813dd1c
+10
-5
+10
-5
drivers/gpu/drm/amd/display/dc/core/dc_link.c
+10
-5
drivers/gpu/drm/amd/display/dc/core/dc_link.c
···
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{
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struct dc_stream_state *stream = pipe_ctx->stream;
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struct dc_link *link = stream->sink->link;
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-
union down_spread_ctrl downspread;
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+
union down_spread_ctrl old_downspread;
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union down_spread_ctrl new_downspread;
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core_link_read_dpcd(link, DP_DOWNSPREAD_CTRL,
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-
&downspread.raw, sizeof(downspread));
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&old_downspread.raw, sizeof(old_downspread));
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downspread.bits.IGNORE_MSA_TIMING_PARAM =
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new_downspread.raw = old_downspread.raw;
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+
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new_downspread.bits.IGNORE_MSA_TIMING_PARAM =
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(stream->ignore_msa_timing_param) ? 1 : 0;
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core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
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&downspread.raw, sizeof(downspread));
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+
if (new_downspread.raw != old_downspread.raw) {
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+
core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
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&new_downspread.raw, sizeof(new_downspread));
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}
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}
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static enum dc_status enable_link_dp(