[PATCH 3/8] drm/i915: Set scaler mode for NV12

Vidya Srinivas
2017-06-20T06:03:23Z

This patch sets appropriate scaler mode for NV12 format.
In this mode, skylake scaler does either chroma-upsampling or
chroma-upsampling and resolution scaling

v2: Review comments from Ville addressed
NV12 case to be checked first for setting
the scaler

v3: Rebased (me)

Signed-off-by: Chandra Konduru <chandra.konduru@intel.com>
Signed-off-by: Nabendu Maiti <nabendu.bikash.maiti@intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_atomic.c | 8 +++++++-
2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 41ddd25..5c3b120 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6390,6 +6390,7 @@ enum {
#define PS_SCALER_MODE_MASK (3 << 28)
#define PS_SCALER_MODE_DYN (0 << 28)
#define PS_SCALER_MODE_HQ (1 << 28)
+#define PS_SCALER_MODE_NV12 (2 << 28)
#define PS_PLANE_SEL_MASK (7 << 25)
#define PS_PLANE_SEL(plane) (((plane) + 1) << 25)
#define PS_FILTER_MASK (3 << 23)
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 36d4e63..808f8e6 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -325,7 +325,13 @@ int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
}

/* set scaler mode */
- if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+ if (plane_state && plane_state->base.fb &&
+ plane_state->base.fb->format->format ==
+ DRM_FORMAT_NV12) {
+ DRM_ERROR("NV12 format setting scaler mode\n");
+ scaler_state->scalers[*scaler_id].mode =
+ PS_SCALER_MODE_NV12;
+ } else if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
scaler_state->scalers[*scaler_id].mode = 0;
} else if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
/*