From: Wu Fengguang Date: Fri, 9 Dec 2011 12:42:21 +0000 (+0800) Subject: drm/i915: DisplayPort hot remove notification to audio driver X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=832afda6a7d7235ef0e09f4ec46736861540da6d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/i915: DisplayPort hot remove notification to audio driver On DP monitor hot remove, clear DP_AUDIO_OUTPUT_ENABLE accordingly, so that the audio driver will receive hot plug events and take action to refresh its device state and ELD contents. Note that the DP_AUDIO_OUTPUT_ENABLE bit may be enabled or disabled only when the link training is complete and set to "Normal". Tested OK for both hot plug/remove and DPMS on/off. Signed-off-by: Wu Fengguang Signed-off-by: Keith Packard --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 92b041b66e49..db3b461ad412 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1926,6 +1926,7 @@ intel_dp_link_down(struct intel_dp *intel_dp) intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); } + DP &= ~DP_AUDIO_OUTPUT_ENABLE; I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); POSTING_READ(intel_dp->output_reg); msleep(intel_dp->panel_power_down_delay);