From: Jani Nikula <jani.nikula@xxxxxxxxx> [ Upstream commit 9fcb1704d1d51b12e2f03c78bca013d0cbbb7c98 ] The eDP port A register on PCH split platforms has a slightly different register layout from the other ports, with bit 6 being either alternate scrambler reset or reserved, depending on the generation. Our misinterpretation of the bit as audio has lead to warning. Fix this by not enabling audio on port A, since none of our platforms support audio on port A anyway. v2: DDI doesn't have audio on port A either (Sivakumar Thulasimani) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89958 Reported-and-tested-by: Chris Bainbridge <chris.bainbridge@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 740d9eb..a29db0a 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1037,7 +1037,7 @@ intel_dp_compute_config(struct intel_encoder *encoder, pipe_config->has_dp_encoder = true; pipe_config->has_drrs = false; - pipe_config->has_audio = intel_dp->has_audio; + pipe_config->has_audio = intel_dp->has_audio && port != PORT_A; if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { intel_fixed_panel_mode(intel_connector->panel.fixed_mode, @@ -1879,8 +1879,8 @@ static void intel_dp_get_config(struct intel_encoder *encoder, int dotclock; tmp = I915_READ(intel_dp->output_reg); - if (tmp & DP_AUDIO_OUTPUT_ENABLE) - pipe_config->has_audio = true; + + pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A; if ((port == PORT_A) || !HAS_PCH_CPT(dev)) { if (tmp & DP_SYNC_HS_HIGH) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html