[PATCH 06/10] drm/i915/psr: set CHICKEN_TRANS for psr2

[vathsala nagaraju]

As per bpsec, CHICKEN_TRANS_EDP bit 12 ,15
must be programmed.
Enable bit 12 for programmable header packet.
Enable bit 15 for Y cordinate support.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Jim Bride <jim.bride at linux.intel.com>
Signed-off-by: vathsala nagaraju <vathsala.nagaraju at intel.com>
Signed-off-by: Patil Deepti <deepti.patil at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h  | 7 +++++++
 drivers/gpu/drm/i915/intel_psr.c | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7830e6e..5ca506a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6449,6 +6449,13 @@ enum {
 #define  BDW_DPRS_MASK_VBLANK_SRD	(1 << 0)
 #define CHICKEN_PIPESL_1(pipe) _MMIO_PIPE(pipe, _CHICKEN_PIPESL_1_A, _CHICKEN_PIPESL_1_B)
 
+#define CHICKEN_TRANS_A         0x420c0
+#define CHICKEN_TRANS_B         0x420c4
+#define CHICKEN_TRANS(trans) _MMIO_TRANS(trans, CHICKEN_TRANS_A, CHICKEN_TRANS_B)
+#define TRANS_EDP              3
+#define CHICKEN_TRANS_BIT12    (1<<12)
+#define CHICKEN_TRANS_BIT15    (1<<15)
+
 #define DISP_ARB_CTL	_MMIO(0x45000)
 #define  DISP_FBC_MEMORY_WAKE		(1<<31)
 #define  DISP_TILE_SURFACE_SWIZZLING	(1<<13)
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 494e4b2..2e75ef6 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -332,6 +332,7 @@ static void hsw_enable_source_psr2(struct intel_dp *intel_dp)
 	 */
 	uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
 	uint32_t val = EDP_PSR_ENABLE;
+	uint32_t chicken_trans = 0;
 
 	val |= idle_frames << EDP_PSR_IDLE_FRAME_SHIFT;
 
@@ -349,6 +350,12 @@ static void hsw_enable_source_psr2(struct intel_dp *intel_dp)
 	else
 		val |= EDP_PSR2_TP2_TIME_50;
 
+	/* Set CHICKEN_TRANS_BIT15 if Y coordinate is supported */
+	if (dev_priv->psr.y_cord_support)
+		chicken_trans = CHICKEN_TRANS_BIT15;
+	/* Set CHICKEN_TRANS_BIT12 for programable header */
+	chicken_trans = chicken_trans | CHICKEN_TRANS_BIT12;
+	I915_WRITE(CHICKEN_TRANS(TRANS_EDP), chicken_trans);
 	I915_WRITE(EDP_PSR2_CTL, val);
 }
 
-- 
1.9.1