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drm/i915: fix pipe DDI mode select

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Mask the value before changing it and also select DVI when needed.

DVI was working in cases where the BIOS was setting the correct value
because we were not masking the value before changing it.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2012-08-08 14:15:27 -03:00 committed by Daniel Vetter
parent c96ea64ebb
commit 3f7c447faa
2 changed files with 7 additions and 1 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -4302,6 +4302,7 @@
/* Those bits are ignored by pipe EDP since it can only connect to DDI A */
#define PIPE_DDI_PORT_MASK (7<<28)
#define PIPE_DDI_SELECT_PORT(x) ((x)<<28)
#define PIPE_DDI_MODE_SELECT_MASK (7<<24)
#define PIPE_DDI_MODE_SELECT_HDMI (0<<24)
#define PIPE_DDI_MODE_SELECT_DVI (1<<24)
#define PIPE_DDI_MODE_SELECT_DP_SST (2<<24)

7
drivers/gpu/drm/i915/intel_ddi.c
View File

@ -726,13 +726,18 @@ void intel_ddi_mode_set(struct drm_encoder *encoder,
temp = I915_READ(DDI_FUNC_CTL(pipe));
temp &= ~PIPE_DDI_PORT_MASK;
temp &= ~PIPE_DDI_BPC_12;
temp &= ~PIPE_DDI_MODE_SELECT_MASK;
temp |= PIPE_DDI_SELECT_PORT(port) |
PIPE_DDI_MODE_SELECT_HDMI |
((intel_crtc->bpp > 24) ?
PIPE_DDI_BPC_12 :
PIPE_DDI_BPC_8) |
PIPE_DDI_FUNC_ENABLE;
if (intel_hdmi->has_hdmi_sink)
temp |= PIPE_DDI_MODE_SELECT_HDMI;
else
temp |= PIPE_DDI_MODE_SELECT_DVI;
I915_WRITE(DDI_FUNC_CTL(pipe), temp);
intel_hdmi->set_infoframes(encoder, adjusted_mode);