From: Eric Anholt Date: Wed, 2 Feb 2011 20:08:07 +0000 (-0800) Subject: drm/i915: Set the transcoder port to none when disabling DP. X-Git-Tag: firefly_0821_release~7613^2~1688^2~29^2~31 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cb3543c6b14b145c6e35d0a36a48abfc6fe18600;p=firefly-linux-kernel-4.4.55.git drm/i915: Set the transcoder port to none when disabling DP. The specs say to do so. Signed-off-by: Eric Anholt Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 77b153093cf1..3297cf1a14ed 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -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) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a4acef6c1474..b5f7acf5a9db 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -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 */