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
v4:(Rodrigo)
- initialize chicken_trans=0,add chicken_trans=CHICKEN_TRANS_BIT12
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 7020f42..b804066 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -475,6 +475,7 @@ 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);
+ uint32_t chicken_trans = 0;
if (!HAS_PSR(dev_priv)) {
DRM_DEBUG_KMS("PSR not supported on this platform\n");
@@ -505,6 +506,12 @@ 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_BIT12 for programable header */
+ chicken_trans = CHICKEN_TRANS_BIT12;
+ /* 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
