leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915: Fix 12bpc HDMI enable for IBX

Browse Source 
Follow the procedure listed in Bspec to toggle the port enable bit off
and on when enabling HDMI with 12bpc and pixel repeat on IBX. The old
code didn't actually enable the port before "toggling" the bit back off,
so the whole workaround was essentially a nop.

Also take the opportunity to clarify the code by splitting the gmch
platforms to a separate (much more straightforward) function.

v2: Rebased due to crtc->config changes

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chandra Konduru <Chandra.konduru@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-05-05 17:06:23 +03:00 committed by Daniel Vetter
parent c5de7c6f3b
commit bf868c7dda
1 changed files with 55 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -944,47 +944,73 @@ static void intel_enable_hdmi_audio(struct intel_encoder *encoder)
intel_audio_codec_enable(encoder);
}
static void intel_enable_hdmi(struct intel_encoder *encoder)
static void g4x_enable_hdmi(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
u32 temp;
u32 enable_bits = SDVO_ENABLE;
if (intel_crtc->config->has_audio)
enable_bits |= SDVO_AUDIO_ENABLE;
temp = I915_READ(intel_hdmi->hdmi_reg);
/* HW workaround for IBX, we need to move the port to transcoder A
* before disabling it, so restore the transcoder select bit here. */
if (HAS_PCH_IBX(dev))
enable_bits |= SDVO_PIPE_SEL(intel_crtc->pipe);
/* HW workaround, need to toggle enable bit off and on for 12bpc, but
* we do this anyway which shows more stable in testing.
*/
if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(intel_hdmi->hdmi_reg, temp & ~SDVO_ENABLE);
POSTING_READ(intel_hdmi->hdmi_reg);
}
temp |= enable_bits;
temp |= SDVO_ENABLE;
if (crtc->config->has_audio)
temp |= SDVO_AUDIO_ENABLE;
I915_WRITE(intel_hdmi->hdmi_reg, temp);
POSTING_READ(intel_hdmi->hdmi_reg);
/* HW workaround, need to write this twice for issue that may result
* in first write getting masked.
if (crtc->config->has_audio)
intel_enable_hdmi_audio(encoder);
}
static void ibx_enable_hdmi(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
u32 temp;
temp = I915_READ(intel_hdmi->hdmi_reg);
temp |= SDVO_ENABLE;
if (crtc->config->has_audio)
temp |= SDVO_AUDIO_ENABLE;
/*
* HW workaround, need to write this twice for issue
* that may result in first write getting masked.
*/
if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(intel_hdmi->hdmi_reg, temp);
POSTING_READ(intel_hdmi->hdmi_reg);
I915_WRITE(intel_hdmi->hdmi_reg, temp);
POSTING_READ(intel_hdmi->hdmi_reg);
/*
* HW workaround, need to toggle enable bit off and on
* for 12bpc with pixel repeat.
*
* FIXME: BSpec says this should be done at the end of
* of the modeset sequence, so not sure if this isn't too soon.
*/
if (crtc->config->pipe_bpp > 24 &&
crtc->config->pixel_multiplier > 1) {
I915_WRITE(intel_hdmi->hdmi_reg, temp & ~SDVO_ENABLE);
POSTING_READ(intel_hdmi->hdmi_reg);
/*
* HW workaround, need to write this twice for issue
* that may result in first write getting masked.
*/
I915_WRITE(intel_hdmi->hdmi_reg, temp);
POSTING_READ(intel_hdmi->hdmi_reg);
I915_WRITE(intel_hdmi->hdmi_reg, temp);
POSTING_READ(intel_hdmi->hdmi_reg);
}
if (intel_crtc->config->has_audio)
if (crtc->config->has_audio)
intel_enable_hdmi_audio(encoder);
}
@ -1504,7 +1530,7 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder)
intel_crtc->config->has_hdmi_sink,
adjusted_mode);
intel_enable_hdmi(encoder);
g4x_enable_hdmi(encoder);
vlv_wait_port_ready(dev_priv, dport, 0x0);
}
@ -1821,7 +1847,7 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
intel_crtc->config->has_hdmi_sink,
adjusted_mode);
intel_enable_hdmi(encoder);
g4x_enable_hdmi(encoder);
vlv_wait_port_ready(dev_priv, dport, 0x0);
}
@ -2010,8 +2036,10 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
intel_encoder->pre_enable = intel_hdmi_pre_enable;
if (HAS_PCH_CPT(dev))
intel_encoder->enable = cpt_enable_hdmi;
else if (HAS_PCH_IBX(dev))
intel_encoder->enable = ibx_enable_hdmi;
else
intel_encoder->enable = intel_enable_hdmi;
intel_encoder->enable = g4x_enable_hdmi;
}
intel_encoder->type = INTEL_OUTPUT_HDMI;