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drm/i915: Fix HDMI mode select for Cougarpoint PCH

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For real HDMI sink, CPT HDMI port has to set 'HDMI' mode flag
in order to make HDMI audio work correctly.

This is required patch for drm/i915 to enable HDMI audio on CPT PCH,
ALSA patch is at http://mailman.alsa-project.org/pipermail/alsa-devel/2010-May/027601.html

Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2010-05-12 11:02:14 +08:00 committed by Eric Anholt
parent 778c35444f
commit 467b200da7
2 changed files with 7 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -2744,6 +2744,9 @@
#define SDVO_ENCODING (0)
#define TMDS_ENCODING (2 << 10)
#define NULL_PACKET_VSYNC_ENABLE (1 << 9)
/* CPT */
#define HDMI_MODE_SELECT (1 << 9)
#define DVI_MODE_SELECT (0)
#define SDVOB_BORDER_ENABLE (1 << 7)
#define AUDIO_ENABLE (1 << 6)
#define VSYNC_ACTIVE_HIGH (1 << 4)

5
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -59,8 +59,11 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
SDVO_VSYNC_ACTIVE_HIGH |
SDVO_HSYNC_ACTIVE_HIGH;
if (hdmi_priv->has_hdmi_sink)
if (hdmi_priv->has_hdmi_sink) {
sdvox |= SDVO_AUDIO_ENABLE;
if (HAS_PCH_CPT(dev))
sdvox |= HDMI_MODE_SELECT;
}
if (intel_crtc->pipe == 1) {
if (HAS_PCH_CPT(dev))