[PATCH 2/2] drm/i915: Add 90/270 rotation for NV12 format.

[Chandra Konduru <chandra.konduru@intel.com>]

Adding NV12 90/270 rotation support for primary and sprite planes.

Signed-off-by: Chandra Konduru <chandra.konduru@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   23 ++++++++++++++++-------
 drivers/gpu/drm/i915/intel_sprite.c  |   32 +++++++++++++++++++++++++-------
 2 files changed, 41 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c385a3b..77d7f69 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3105,7 +3105,8 @@ static void skylake_update_primary_plane(struct drm_crtc *crtc,
 	int src_x = 0, src_y = 0, src_w = 0, src_h = 0;
 	int dst_x = 0, dst_y = 0, dst_w = 0, dst_h = 0;
 	int scaler_id = -1;
-	u32 aux_dist = 0, aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
+	unsigned long aux_dist = 0;
+	u32 aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
 	u32 tile_row_adjustment = 0;
 
 	plane_state = to_intel_plane_state(plane->state);
@@ -3163,12 +3164,16 @@ static void skylake_update_primary_plane(struct drm_crtc *crtc,
 		x_offset = stride * tile_height - y - src_h;
 		y_offset = x;
 		plane_size = (src_w - 1) << 16 | (src_h - 1);
-		/*
-		 * TBD: For NV12 90/270 rotation, Y and UV subplanes should
-		 * be treated as separate surfaces and GTT remapping for
-		 * rotation should be done separately for each subplane.
-		 * Enable support once seperate remappings are available.
-		 */
+
+		if (fb->pixel_format == DRM_FORMAT_NV12) {
+			u32 uv_tile_height = intel_tile_height(dev, fb->pixel_format,
+						fb->modifier[0], 1);
+			aux_stride = DIV_ROUND_UP(fb->height / 2, uv_tile_height);
+			aux_dist = intel_plane_obj_offset(to_intel_plane(plane), obj, 1) -
+				surf_addr;
+			aux_x_offset = aux_stride * uv_tile_height - y / 2 - fb->height / 2;
+			aux_y_offset = x / 2;
+		}
 	} else {
 		stride = fb->pitches[0] / stride_div;
 		x_offset = x;
@@ -13144,6 +13149,10 @@ intel_check_primary_plane(struct drm_plane *plane,
 	if (fb && format_is_yuv(fb->pixel_format)) {
 		src->x1 &= ~0x10000;
 		src->x2 &= ~0x10000;
+		if (intel_rotation_90_or_270(state->base.rotation)) {
+			src->y1 &= ~0x10000;
+			src->y2 &= ~0x10000;
+		}
 	}
 
 	if (INTEL_INFO(dev)->gen >= 9) {
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index e23fe8e..d4ce7eb 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -190,7 +190,8 @@ skl_update_plane(struct drm_plane *drm_plane, struct drm_crtc *crtc,
 	int x_offset, y_offset;
 	struct intel_crtc_state *crtc_state = to_intel_crtc(crtc)->config;
 	int scaler_id;
-	u32 aux_dist = 0, aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
+	unsigned long aux_dist = 0;
+	u32 aux_x_offset = 0, aux_y_offset = 0, aux_stride = 0;
 	u32 tile_row_adjustment = 0;
 
 	plane_ctl = PLANE_CTL_ENABLE |
@@ -239,12 +240,14 @@ skl_update_plane(struct drm_plane *drm_plane, struct drm_crtc *crtc,
 		x_offset = stride * tile_height - y - (src_h + 1);
 		y_offset = x;
 
-		/*
-		 * TBD: For NV12 90/270 rotation, Y and UV subplanes should
-		 * be treated as separate surfaces and GTT remapping for
-		 * rotation should be done separately for each subplane.
-		 * Enable support once seperate remappings are available.
-		 */
+		if (fb->pixel_format == DRM_FORMAT_NV12) {
+			u32 uv_tile_height = intel_tile_height(dev, fb->pixel_format,
+						fb->modifier[0], 1);
+			aux_stride = DIV_ROUND_UP(fb->height / 2, uv_tile_height);
+			aux_dist = intel_plane_obj_offset(intel_plane, obj, 1) - surf_addr;
+			aux_x_offset = aux_stride * uv_tile_height - y / 2 - fb->height / 2;
+			aux_y_offset = x / 2;
+		}
 	} else {
 		stride = fb->pitches[0] / stride_div;
 		plane_size = (src_h << 16) | src_w;
@@ -909,6 +912,21 @@ intel_check_sprite_plane(struct drm_plane *plane,
 
 			if (crtc_w == 0)
 				state->visible = false;
+
+			if (intel_rotation_90_or_270(state->base.rotation)) {
+				src_y &= ~1;
+				src_h &= ~1;
+
+				/*
+				 * Must keep src and dst the
+				 * same if we can't scale.
+				 */
+				if (!intel_plane->can_scale)
+					crtc_h &= ~1;
+
+				if (crtc_h == 0)
+					state->visible = false;
+			}
 		}
 	}
 
-- 
1.7.9.5

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