[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.

v2: (Rodrigo)
- move CHICKEN_TRANS_EDP bit set logic right after setup_vsc

v3:(Rodrigo)
- initialize chicken_trans to CHICKEN_TRANS_BIT12 instead of 0

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 | 6 ++++++
 2 files changed, 13 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 7020f42..7573c2f 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -475,6 +475,8 @@ void intel_psr_enable(struct intel_dp *intel_dp)
 	struct drm_device *dev = intel_dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
+	/* Set CHICKEN_TRANS_BIT12 for programable header */
+	uint32_t chicken_trans = CHICKEN_TRANS_BIT12;
 
 	if (!HAS_PSR(dev_priv)) {
 		DRM_DEBUG_KMS("PSR not supported on this platform\n");
@@ -505,6 +507,10 @@ void intel_psr_enable(struct intel_dp *intel_dp)
 				dev_priv->psr.psr2_support = false;
 			else
 				skl_psr_setup_su_vsc(intel_dp);
+			/* Set CHICKEN_TRANS_BIT15 if Y coordinate is supported */
+			if (dev_priv->psr.y_cord_support)
+				chicken_trans |= CHICKEN_TRANS_BIT15;
+			I915_WRITE(CHICKEN_TRANS(TRANS_EDP), chicken_trans);
 		} else {
 			/* set up vsc header for psr1 */
 			hsw_psr_setup_vsc(intel_dp);
-- 
1.9.1