drm/amdgpu: fix DP mode validation
Switch the order of the loops to walk the rates on the top so we exhaust all DP 1.1 rate/lane combinations before trying DP 1.2 rate/lane combos. This avoids selecting rates that are supported by the monitor, but not the connector leading to valid modes getting rejected. bug: https://bugs.freedesktop.org/show_bug.cgi?id=95206 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
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@ -276,8 +276,8 @@ static int amdgpu_atombios_dp_get_dp_link_config(struct drm_connector *connector
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}
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}
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} else {
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for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
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for (i = 0; i < ARRAY_SIZE(link_rates) && link_rates[i] <= max_link_rate; i++) {
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for (i = 0; i < ARRAY_SIZE(link_rates) && link_rates[i] <= max_link_rate; i++) {
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for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
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max_pix_clock = (lane_num * link_rates[i] * 8) / bpp;
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if (max_pix_clock >= pix_clock) {
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*dp_lanes = lane_num;
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