forked from Minki/linux
radeon/kms: fix dp displayport mode validation
Check if there is a big enough dp clock & enough dp lane to drive the video mode provided. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-By: Alex Deucher <alexdeucher@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Dave Airlie <airlied@gmail.com>
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@ -187,9 +187,9 @@ static int dp_link_clock_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
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int dp_mode_valid(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
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int dp_mode_valid(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
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{
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{
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int lanes = dp_lanes_for_mode_clock(dpcd, mode_clock);
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int lanes = dp_lanes_for_mode_clock(dpcd, mode_clock);
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int bw = dp_lanes_for_mode_clock(dpcd, mode_clock);
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int dp_clock = dp_link_clock_for_mode_clock(dpcd, mode_clock);
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if ((lanes == 0) || (bw == 0))
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if ((lanes == 0) || (dp_clock == 0))
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return MODE_CLOCK_HIGH;
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return MODE_CLOCK_HIGH;
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return MODE_OK;
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return MODE_OK;
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