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drm/i915: Set the transcoder port to none when disabling DP.

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The specs say to do so.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Eric Anholt 2011-02-02 12:08:07 -08:00 committed by Chris Wilson
parent 308977ac03
commit cb3543c6b1
2 changed files with 2 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
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@ -3245,6 +3245,7 @@
#define TRANS_DP_PORT_SEL_B (0<<29)
#define TRANS_DP_PORT_SEL_C (1<<29)
#define TRANS_DP_PORT_SEL_D (2<<29)
#define TRANS_DP_PORT_SEL_NONE (3<<29)
#define TRANS_DP_PORT_SEL_MASK (3<<29)
#define TRANS_DP_AUDIO_ONLY (1<<26)
#define TRANS_DP_ENH_FRAMING (1<<18)

1
drivers/gpu/drm/i915/intel_display.c
View file

@ -2818,6 +2818,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
reg = TRANS_DP_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
temp |= TRANS_DP_PORT_SEL_NONE;
I915_WRITE(reg, temp);
/* disable DPLL_SEL */