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| author | Wu Fengguang <fengguang.wu@intel.com> | 2011-09-05 14:25:34 +0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-09-21 14:52:41 -0700 |
| commit | e0dac65ed45e72fe34cc7ccc76de0ba220bd38bb (patch) | |
| tree | f6f1628bb63a9db0b77318e0486e91d26c918ae0 /drivers/gpu/drm/i915/intel_hdmi.c | |
| parent | 76adaa34db407f174dd06370cb60f6029c33b465 (diff) | |
| download | op-kernel-dev-e0dac65ed45e72fe34cc7ccc76de0ba220bd38bb.zip op-kernel-dev-e0dac65ed45e72fe34cc7ccc76de0ba220bd38bb.tar.gz | |
drm/i915: pass ELD to HDMI/DP audio driver
Add ELD support for Intel Eaglelake, IbexPeak/Ironlake,
SandyBridge/CougarPoint and IvyBridge/PantherPoint chips.
ELD (EDID-Like Data) describes to the HDMI/DP audio driver the audio
capabilities of the plugged monitor. It's built and passed to audio
driver in 2 steps:
(1) at get_modes time, parse EDID and save ELD to drm_connector.eld[]
(2) at mode_set time, write drm_connector.eld[] to the Transcoder's hw
ELD buffer and set the ELD_valid bit to inform HDMI/DP audio driver
This patch is tested OK on G45/HDMI, IbexPeak/HDMI and IvyBridge/HDMI+DP.
Test scheme: plug in the HDMI/DP monitor, and run
cat /proc/asound/card0/eld*
to check if the monitor name, HDMI/DP type, etc. show up correctly.
Minor imperfection: the GEN5_AUD_CNTL_ST/DIP_Port_Select field always
reads 0 (reserved). Without knowing the port number, I worked it around
by setting the ELD_valid bit for ALL the three ports. It's tested to not
be a problem, because the audio driver will find invalid ELD data and
hence rightfully abort, even when it sees the ELD_valid indicator.
Thanks to Zhenyu and Pierre-Louis for a lot of valuable help and testing.
CC: Zhao Yakui <yakui.zhao@intel.com>
CC: Wang Zhenyu <zhenyu.z.wang@intel.com>
CC: Jeremy Bush <contractfrombelow@gmail.com>
CC: Christopher White <c.white@pulseforce.com>
CC: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
CC: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_hdmi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 226ba83..75026ba 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -245,8 +245,11 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder, sdvox |= HDMI_MODE_SELECT; if (intel_hdmi->has_audio) { + DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n", + pipe_name(intel_crtc->pipe)); sdvox |= SDVO_AUDIO_ENABLE; sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC; + intel_write_eld(encoder, adjusted_mode); } if (intel_crtc->pipe == 1) { |
