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

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Regards

Shashank


On 2/6/2018 6:28 PM, Vidya Srinivas wrote:
From: Chandra Konduru <chandra.konduru@xxxxxxxxx>

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)

Tested-by: Clinton Taylor <clinton.a.taylor@xxxxxxxxx>
Reviewed-by: Clinton Taylor <clinton.a.taylor@xxxxxxxxx>
Signed-off-by: Chandra Konduru <chandra.konduru@xxxxxxxxx>
Signed-off-by: Nabendu Maiti <nabendu.bikash.maiti@xxxxxxxxx>
Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
---
  drivers/gpu/drm/i915/intel_display.c | 33 +++++++++++++++++++++++----------
  drivers/gpu/drm/i915/intel_drv.h     |  3 ++-
  drivers/gpu/drm/i915/intel_sprite.c  |  3 ++-
  3 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5fc9255..74757d0 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 +4660,8 @@ 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,
+		  uint32_t pixel_format)
  {
  	struct intel_crtc_scaler_state *scaler_state =
  		&crtc_state->scaler_state;
@@ -4674,7 +4677,8 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
  	 * the 90/270 degree plane rotation cases (to match the
  	 * GTT mapping), hence no need to account for rotation here.
  	 */
-	need_scaling = src_w != dst_w || src_h != dst_h;
+	need_scaling = src_w != dst_w || src_h != dst_h ||
+				   (pixel_format == DRM_FORMAT_NV12);
This line needs to be aligned to above line, after = , also no need for braces
if (crtc_state->ycbcr420 && scaler_user == SKL_CRTC_INDEX)
  		need_scaling = true;
@@ -4753,7 +4757,7 @@ int skl_update_scaler_crtc(struct intel_crtc_state *state)
  	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);
+		adjusted_mode->crtc_hdisplay, adjusted_mode->crtc_vdisplay, 0);
Why 0 ? shouldn't we send actual current pixel format ? Or if you are just looking for pixel format is NV12 or not, you can make this variable a bool and name it is_nv12 or is_yuv420
  }
/**
@@ -4783,7 +4787,8 @@ 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),
+				fb ? fb->format->format : 0);
Again, sending 0 doesn't look logical to me
if (ret || plane_state->scaler_id < 0)
  		return ret;
@@ -4809,6 +4814,7 @@ 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 +12764,12 @@ 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)
this line should be aligned to the '(' from above line
  {
  	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 +12791,10 @@ 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;
  }
@@ -12807,7 +12816,11 @@ intel_check_primary_plane(struct intel_plane *plane,
  		/* 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);
+			max_scale = skl_max_scale(to_intel_crtc(crtc),
+						crtc_state,
+						state->base.fb ?
+						state->base.fb->format->format :
+						0);
All these parameters should be aligned to the first opening brace '('
  		}
  		can_position = true;
  	}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d4c027a..111f1a4 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);
Align to above '('
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 9e31be2..f2e144b 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);
Alignment
  		} else {
  			can_scale = 0;
  			min_scale = DRM_PLANE_HELPER_NO_SCALING;
- Shashank
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