[PATCH 5/9] drm/i915: BDW PSR: Add single frame update support.

Rodrigo Vivi
2014-06-13T00:15:18Z

When link is in stand by and PSR exit is triggered by a primary or sprite
plane flip this mode allows only one single updated frame to be send to
display than get back to PSR immediately.

Reviewed-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_dp.c | 1 +
2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 05e2541..9ce017b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2409,6 +2409,7 @@ enum punit_power_well {
#define EDP_PSR_BASE(dev) (IS_HASWELL(dev) ? 0x64800 : 0x6f800)
#define EDP_PSR_CTL(dev) (EDP_PSR_BASE(dev) + 0)
#define EDP_PSR_ENABLE (1<<31)
+#define BDW_PSR_SINGLE_FRAME (1<<30)
#define EDP_PSR_LINK_DISABLE (0<<27)
#define EDP_PSR_LINK_STANDBY (1<<27)
#define EDP_PSR_MIN_LINK_ENTRY_TIME_MASK (3<<25)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index f7b2414..0d9c7b6 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1723,6 +1723,7 @@ static void intel_edp_psr_enable_source(struct intel_dp *intel_dp)
val |= EDP_PSR_TP2_TP3_TIME_0us;
val |= EDP_PSR_TP1_TIME_0us;
val |= EDP_PSR_SKIP_AUX_EXIT;
+ val |= IS_BROADWELL(dev) ? BDW_PSR_SINGLE_FRAME : 0;
} else
val |= EDP_PSR_LINK_DISABLE;

--
1.9.3