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Commit 4d302442 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Verify Ironlake eDP presence on DP_A using the capability fuse 



Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 63ee41d7

drivers/gpu/drm/i915/i915_reg.h

+7 −0
Original line number Diff line number Diff line
@@ -2591,6 +2591,13 @@ 
#define ILK_DISPLAY_CHICKEN2	0x42004

#define  ILK_DPARB_GATE	(1<<22)

#define  ILK_VSDPFD_FULL	(1<<21)

#define ILK_DISPLAY_CHICKEN_FUSES	0x42014

#define  ILK_INTERNAL_GRAPHICS_DISABLE	(1<<31)

#define  ILK_INTERNAL_DISPLAY_DISABLE	(1<<30)

#define  ILK_DISPLAY_DEBUG_DISABLE	(1<<29)

#define  ILK_HDCP_DISABLE		(1<<25)

#define  ILK_eDP_A_DISABLE		(1<<24)

#define  ILK_DESKTOP			(1<<23)

#define ILK_DSPCLK_GATE		0x42020

#define  ILK_DPARB_CLK_GATE	(1<<5)

/* According to spec this bit 7/8/9 of 0x42020 should be set to enable FBC */

drivers/gpu/drm/i915/intel_display.c

+18 −1
Original line number Diff line number Diff line
@@ -5379,6 +5379,23 @@ static int intel_encoder_clones(struct drm_device *dev, int type_mask) 
	return index_mask;

}



static bool has_edp_a(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;



	if (!IS_MOBILE(dev))

		return false;



	if ((I915_READ(DP_A) & DP_DETECTED) == 0)

		return false;



	if (IS_GEN5(dev) &&

	    (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))

		return false;



	return true;

}



static void intel_setup_outputs(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -5396,7 +5413,7 @@ static void intel_setup_outputs(struct drm_device *dev) 
	if (HAS_PCH_SPLIT(dev)) {

		dpd_is_edp = intel_dpd_is_edp(dev);



		if (IS_MOBILE(dev) && (I915_READ(DP_A) & DP_DETECTED))

		if (has_edp_a(dev))

			intel_dp_init(dev, DP_A);



		if (dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))