[PATCH 12/16] drm/i915: Upscale scaler max scale for NV12

[Vidya Srinivas <vidya.srinivas@intel.com>]

From: Chandra Konduru <chandra.konduru@intel.com>

This patch updates scaler max limit support for NV12

v2: Rebased (me)

v3: Rebased (me)

v4: Missed the Tested-by/Reviewed-by in the previous series
Adding the same to commit message in this version.

v5: Addressed review comments from Ville and rebased
- calculation of max_scale to be made
less convoluted by splitting it up a bit
- Indentation errors to be fixed in the series

v6: Rebased (me)
Fixed review comments from Paauwe, Bob J
Previous version, where a split of calculation
was done, was wrong. Fixed that issue here.

v7: Rebased (me)

v8: Rebased (me)

v9: Rebased (me)

v10: Rebased (me)

v11: Addressed review comments from Shashank Sharma

Tested-by: Clinton Taylor <clinton.a.taylor@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com>
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/intel_display.c | 40 ++++++++++++++++++++++++++----------
 drivers/gpu/drm/i915/intel_drv.h     |  3 ++-
 drivers/gpu/drm/i915/intel_sprite.c  |  3 ++-
 3 files changed, 33 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1a5bd53..88340ce 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3435,6 +3435,8 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
 		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_UYVY;
 	case DRM_FORMAT_VYUY:
 		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_VYUY;
+	case DRM_FORMAT_NV12:
+		return PLANE_CTL_FORMAT_NV12;
 	default:
 		MISSING_CASE(pixel_format);
 	}
@@ -4658,7 +4660,9 @@ static void cpt_verify_modeset(struct drm_device *dev, int pipe)
 static int
 skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
 		  unsigned int scaler_user, int *scaler_id,
-		  int src_w, int src_h, int dst_w, int dst_h)
+		  int src_w, int src_h, int dst_w, int dst_h,
+		  bool plane_scaler_check,
+		  uint32_t pixel_format)
 {
 	struct intel_crtc_scaler_state *scaler_state =
 		&crtc_state->scaler_state;
@@ -4676,6 +4680,9 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
 	 */
 	need_scaling = src_w != dst_w || src_h != dst_h;
 
+	if (plane_scaler_check)
+		need_scaling = pixel_format == DRM_FORMAT_NV12;
+
 	if (crtc_state->ycbcr420 && scaler_user == SKL_CRTC_INDEX)
 		need_scaling = true;
 
@@ -4751,9 +4758,10 @@ int skl_update_scaler_crtc(struct intel_crtc_state *state)
 	const struct drm_display_mode *adjusted_mode = &state->base.adjusted_mode;
 
 	return skl_update_scaler(state, !state->base.active, SKL_CRTC_INDEX,
-		&state->scaler_state.scaler_id,
-		state->pipe_src_w, state->pipe_src_h,
-		adjusted_mode->crtc_hdisplay, adjusted_mode->crtc_vdisplay);
+				 &state->scaler_state.scaler_id,
+				 state->pipe_src_w, state->pipe_src_h,
+				 adjusted_mode->crtc_hdisplay,
+				 adjusted_mode->crtc_vdisplay, false, 0);
 }
 
 /**
@@ -4783,7 +4791,8 @@ static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
 				drm_rect_width(&plane_state->base.src) >> 16,
 				drm_rect_height(&plane_state->base.src) >> 16,
 				drm_rect_width(&plane_state->base.dst),
-				drm_rect_height(&plane_state->base.dst));
+				drm_rect_height(&plane_state->base.dst),
+				true, fb->format->format);
 
 	if (ret || plane_state->scaler_id < 0)
 		return ret;
@@ -4809,6 +4818,7 @@ static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
 	case DRM_FORMAT_YVYU:
 	case DRM_FORMAT_UYVY:
 	case DRM_FORMAT_VYUY:
+	case DRM_FORMAT_NV12:
 		break;
 	default:
 		DRM_DEBUG_KMS("[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
@@ -12758,11 +12768,13 @@ intel_cleanup_plane_fb(struct drm_plane *plane,
 }
 
 int
-skl_max_scale(struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state)
+skl_max_scale(struct intel_crtc *intel_crtc,
+	      struct intel_crtc_state *crtc_state,
+	      uint32_t pixel_format)
 {
 	struct drm_i915_private *dev_priv;
-	int max_scale;
-	int crtc_clock, max_dotclk;
+	int max_scale, mult;
+	int crtc_clock, max_dotclk, tmpclk1, tmpclk2;
 
 	if (!intel_crtc || !crtc_state->base.enable)
 		return DRM_PLANE_HELPER_NO_SCALING;
@@ -12784,8 +12796,10 @@ skl_max_scale(struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state
 	 *            or
 	 *    cdclk/crtc_clock
 	 */
-	max_scale = min((1 << 16) * 3 - 1,
-			(1 << 8) * ((max_dotclk << 8) / crtc_clock));
+	mult = pixel_format == DRM_FORMAT_NV12 ? 2 : 3;
+	tmpclk1 = (1 << 16) * mult - 1;
+	tmpclk2 = (1 << 8) * ((max_dotclk << 8) / crtc_clock);
+	max_scale = min(tmpclk1, tmpclk2);
 
 	return max_scale;
 }
@@ -12802,12 +12816,16 @@ intel_check_primary_plane(struct intel_plane *plane,
 	bool can_position = false;
 	struct drm_rect clip = {};
 	int ret;
+	uint32_t pixel_format = 0;
 
 	if (INTEL_GEN(dev_priv) >= 9) {
 		/* use scaler when colorkey is not required */
 		if (!state->ckey.flags) {
 			min_scale = 1;
-			max_scale = skl_max_scale(to_intel_crtc(crtc), crtc_state);
+			if (state->base.fb)
+				pixel_format = state->base.fb->format->format;
+			max_scale = skl_max_scale(to_intel_crtc(crtc),
+						  crtc_state, pixel_format);
 		}
 		can_position = true;
 	}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 232730d..735a959 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1580,7 +1580,8 @@ void intel_mode_from_pipe_config(struct drm_display_mode *mode,
 				 struct intel_crtc_state *pipe_config);
 
 int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state);
-int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state);
+int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
+		  uint32_t pixel_format);
 
 static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
 {
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 2c51d8a..77a5433 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -897,7 +897,8 @@ intel_check_sprite_plane(struct intel_plane *plane,
 		if (!state->ckey.flags) {
 			can_scale = 1;
 			min_scale = 1;
-			max_scale = skl_max_scale(crtc, crtc_state);
+			max_scale = skl_max_scale(crtc, crtc_state,
+						  fb->format->format);
 		} else {
 			can_scale = 0;
 			min_scale = DRM_PLANE_HELPER_NO_SCALING;
-- 
2.7.4

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