Re: [RFC] drm/msm/disp/dpu1: add support for inline rotation in dpu driver

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On 03/07/2021 14:32, Kalyan Thota wrote:
Add inline rotation support in dpu driver. This change adds
rotation config for SC7280 target.

Change-Id: I15861dc03422274ffd823fc0fc2c1e47909bb22c
Signed-off-by: Kalyan Thota <kalyan_t@xxxxxxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 47 +++++++++----
  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 20 ++++++
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c      | 93 ++++++++++++++++++++------
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h      |  2 +
  4 files changed, 128 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index d01c4c9..45e4e56 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
@@ -25,6 +25,9 @@
  #define VIG_SM8250_MASK \
  	(VIG_MASK | BIT(DPU_SSPP_QOS_8LVL) | BIT(DPU_SSPP_SCALER_QSEED3LITE))
+#define VIG_SC7280_MASK \
+	(VIG_SC7180_MASK | BIT(DPU_SSPP_INLINE_ROTATION))
+
  #define DMA_SDM845_MASK \
  	(BIT(DPU_SSPP_SRC) | BIT(DPU_SSPP_QOS) | BIT(DPU_SSPP_QOS_8LVL) |\
  	BIT(DPU_SSPP_TS_PREFILL) | BIT(DPU_SSPP_TS_PREFILL_REC1) |\
@@ -102,6 +105,8 @@
  #define MAX_DOWNSCALE_RATIO	4
  #define SSPP_UNITY_SCALE	1
+#define INLINE_ROTATOR_V2 2
+
  #define STRCAT(X, Y) (X Y)
static const uint32_t plane_formats[] = {
@@ -177,6 +182,11 @@ static const uint32_t plane_formats_yuv[] = {
  	DRM_FORMAT_YVU420,
  };
+static const uint32_t rotation_formats[] = {
+	DRM_FORMAT_NV12,
+	/* TODO add formats after validation */
+};
+
  /*************************************************************
   * DPU sub blocks config
   *************************************************************/
@@ -465,7 +475,16 @@ static const struct dpu_ctl_cfg sc7280_ctl[] = {
/* SSPP common configuration */ -#define _VIG_SBLK(num, sdma_pri, qseed_ver) \
+static const struct dpu_rotation_cfg dpu_rot_cfg = {
+	.version = INLINE_ROTATOR_V2,
+	.rot_maxdwnscale_ratio_num = 1,
+	.rot_maxdwnscale_ratio_dem = 1,
+	.rot_maxheight = 1088,
+	.rot_num_formats = ARRAY_SIZE(rotation_formats),
+	.rot_format_list = rotation_formats,
+};
+
+#define _VIG_SBLK(num, sdma_pri, qseed_ver, rot_cfg) \
  	{ \
  	.maxdwnscale = MAX_DOWNSCALE_RATIO, \
  	.maxupscale = MAX_UPSCALE_RATIO, \
@@ -482,6 +501,7 @@ static const struct dpu_ctl_cfg sc7280_ctl[] = {
  	.num_formats = ARRAY_SIZE(plane_formats_yuv), \
  	.virt_format_list = plane_formats, \
  	.virt_num_formats = ARRAY_SIZE(plane_formats), \
+	.rotation_cfg = rot_cfg, \
  	}
#define _DMA_SBLK(num, sdma_pri) \
@@ -498,13 +518,13 @@ static const struct dpu_ctl_cfg sc7280_ctl[] = {
  	}
static const struct dpu_sspp_sub_blks sdm845_vig_sblk_0 =
-				_VIG_SBLK("0", 5, DPU_SSPP_SCALER_QSEED3);
+				_VIG_SBLK("0", 5, DPU_SSPP_SCALER_QSEED3, 0);
  static const struct dpu_sspp_sub_blks sdm845_vig_sblk_1 =
-				_VIG_SBLK("1", 6, DPU_SSPP_SCALER_QSEED3);
+				_VIG_SBLK("1", 6, DPU_SSPP_SCALER_QSEED3, 0);
  static const struct dpu_sspp_sub_blks sdm845_vig_sblk_2 =
-				_VIG_SBLK("2", 7, DPU_SSPP_SCALER_QSEED3);
+				_VIG_SBLK("2", 7, DPU_SSPP_SCALER_QSEED3, 0);
  static const struct dpu_sspp_sub_blks sdm845_vig_sblk_3 =
-				_VIG_SBLK("3", 8, DPU_SSPP_SCALER_QSEED3);
+				_VIG_SBLK("3", 8, DPU_SSPP_SCALER_QSEED3, 0);
static const struct dpu_sspp_sub_blks sdm845_dma_sblk_0 = _DMA_SBLK("8", 1);
  static const struct dpu_sspp_sub_blks sdm845_dma_sblk_1 = _DMA_SBLK("9", 2);
@@ -543,7 +563,10 @@ static const struct dpu_sspp_cfg sdm845_sspp[] = {
  };
static const struct dpu_sspp_sub_blks sc7180_vig_sblk_0 =
-				_VIG_SBLK("0", 4, DPU_SSPP_SCALER_QSEED4);
+				_VIG_SBLK("0", 4, DPU_SSPP_SCALER_QSEED4, 0);
+
+static const struct dpu_sspp_sub_blks sc7280_vig_sblk_0 =
+				_VIG_SBLK("0", 4, DPU_SSPP_SCALER_QSEED4, &dpu_rot_cfg);
static const struct dpu_sspp_cfg sc7180_sspp[] = {
  	SSPP_BLK("sspp_0", SSPP_VIG0, 0x4000, VIG_SC7180_MASK,
@@ -557,13 +580,13 @@ static const struct dpu_sspp_cfg sc7180_sspp[] = {
  };
static const struct dpu_sspp_sub_blks sm8250_vig_sblk_0 =
-				_VIG_SBLK("0", 5, DPU_SSPP_SCALER_QSEED3LITE);
+				_VIG_SBLK("0", 5, DPU_SSPP_SCALER_QSEED3LITE, 0);
  static const struct dpu_sspp_sub_blks sm8250_vig_sblk_1 =
-				_VIG_SBLK("1", 6, DPU_SSPP_SCALER_QSEED3LITE);
+				_VIG_SBLK("1", 6, DPU_SSPP_SCALER_QSEED3LITE, 0);
  static const struct dpu_sspp_sub_blks sm8250_vig_sblk_2 =
-				_VIG_SBLK("2", 7, DPU_SSPP_SCALER_QSEED3LITE);
+				_VIG_SBLK("2", 7, DPU_SSPP_SCALER_QSEED3LITE, 0);
  static const struct dpu_sspp_sub_blks sm8250_vig_sblk_3 =
-				_VIG_SBLK("3", 8, DPU_SSPP_SCALER_QSEED3LITE);
+				_VIG_SBLK("3", 8, DPU_SSPP_SCALER_QSEED3LITE, 0);
static const struct dpu_sspp_cfg sm8250_sspp[] = {
  	SSPP_BLK("sspp_0", SSPP_VIG0, 0x4000, VIG_SM8250_MASK,
@@ -585,8 +608,8 @@ static const struct dpu_sspp_cfg sm8250_sspp[] = {
  };
static const struct dpu_sspp_cfg sc7280_sspp[] = {
-	SSPP_BLK("sspp_0", SSPP_VIG0, 0x4000, VIG_SC7180_MASK,
-		sc7180_vig_sblk_0, 0,  SSPP_TYPE_VIG, DPU_CLK_CTRL_VIG0),
+	SSPP_BLK("sspp_0", SSPP_VIG0, 0x4000, VIG_SC7280_MASK,
+		sc7280_vig_sblk_0, 0,  SSPP_TYPE_VIG, DPU_CLK_CTRL_VIG0),
  	SSPP_BLK("sspp_8", SSPP_DMA0, 0x24000,  DMA_SDM845_MASK,
  		sdm845_dma_sblk_0, 1, SSPP_TYPE_DMA, DPU_CLK_CTRL_DMA0),
  	SSPP_BLK("sspp_9", SSPP_DMA1, 0x26000,  DMA_CURSOR_SDM845_MASK,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index d2a945a..8421001 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -129,6 +129,7 @@ enum {
  	DPU_SSPP_TS_PREFILL,
  	DPU_SSPP_TS_PREFILL_REC1,
  	DPU_SSPP_CDP,
+	DPU_SSPP_INLINE_ROTATION,
  	DPU_SSPP_MAX
  };
@@ -309,6 +310,24 @@ struct dpu_qos_lut_tbl {
  };
/**
+ * struct dpu_rotation_cfg - define inline rotation config
+ * @version: Inline rotation version
+ * @rot_maxdwnscale_ratio_num: max downscale ratio for rotation numerator
+ * @rot_maxdwnscale_ratio_dem: max downscale ratio for denominator
+ * @rot_maxheight: max pre rotated height allowed for rotation
+ * @rot_num_formats: count of the formats
+ * @rot_format_list: list of supported rotator formats
+ */
+struct dpu_rotation_cfg {
+	u32 version;
+	u32 rot_maxdwnscale_ratio_num;
+	u32 rot_maxdwnscale_ratio_dem;
+	u32 rot_maxheight;
+	u32 rot_num_formats;
+	const u32 *rot_format_list;
+};
+
+/**
   * struct dpu_caps - define DPU capabilities
   * @max_mixer_width    max layer mixer line width support.
   * @max_mixer_blendstages max layer mixer blend stages or
@@ -384,6 +403,7 @@ struct dpu_sspp_sub_blks {
  	u32 num_formats;
  	const u32 *virt_format_list;
  	u32 virt_num_formats;
+	const struct dpu_rotation_cfg *rotation_cfg;
  };
/**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index ec4a6f0..0daee63 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -539,16 +539,28 @@ static void _dpu_plane_set_scanout(struct drm_plane *plane,
static void _dpu_plane_setup_scaler3(struct dpu_plane *pdpu,
  		struct dpu_plane_state *pstate,
-		uint32_t src_w, uint32_t src_h, uint32_t dst_w, uint32_t dst_h,
  		struct dpu_hw_scaler3_cfg *scale_cfg,
  		const struct dpu_format *fmt,
  		uint32_t chroma_subsmpl_h, uint32_t chroma_subsmpl_v)
  {
  	uint32_t i;
+	bool inline_rotation = (pstate->rotation & DRM_MODE_ROTATE_90);
+	uint32_t src_w = drm_rect_width(&pdpu->pipe_cfg.src_rect);
+	uint32_t src_h = drm_rect_height(&pdpu->pipe_cfg.src_rect);
+	uint32_t dst_w = drm_rect_width(&pdpu->pipe_cfg.dst_rect);
+	uint32_t dst_h = drm_rect_height(&pdpu->pipe_cfg.dst_rect);
memset(scale_cfg, 0, sizeof(*scale_cfg));
  	memset(&pstate->pixel_ext, 0, sizeof(struct dpu_hw_pixel_ext));
+ /*
+	 * For inline rotation cases, scaler config is post-rotation,
+	 * so swap the dimensions here. However, pixel extension will
+	 * need pre-rotation settings.
+	 */
+	if (inline_rotation)
+		swap(src_w, src_h);
+
  	scale_cfg->phase_step_x[DPU_SSPP_COMP_0] =
  		mult_frac((1 << PHASE_STEP_SHIFT), src_w, dst_w);
  	scale_cfg->phase_step_y[DPU_SSPP_COMP_0] =
@@ -587,10 +599,10 @@ static void _dpu_plane_setup_scaler3(struct dpu_plane *pdpu,
  			scale_cfg->preload_y[i] = DPU_QSEED3_DEFAULT_PRELOAD_V;
  		}
- pstate->pixel_ext.num_ext_pxls_top[i] =
-			scale_cfg->src_height[i];
-		pstate->pixel_ext.num_ext_pxls_left[i] =
-			scale_cfg->src_width[i];
+		pstate->pixel_ext.num_ext_pxls_top[i] = inline_rotation ?
+			scale_cfg->src_width[i] : scale_cfg->src_height[i];
+		pstate->pixel_ext.num_ext_pxls_left[i] = inline_rotation ?
+			scale_cfg->src_height[i] : scale_cfg->src_width[i];
  	}
  	if (!(DPU_FORMAT_IS_YUV(fmt)) && (src_h == dst_h)
  		&& (src_w == dst_w))
@@ -662,10 +674,6 @@ static void _dpu_plane_setup_scaler(struct dpu_plane *pdpu,
  	/* don't chroma subsample if decimating */
  	/* update scaler. calculate default config for QSEED3 */
  	_dpu_plane_setup_scaler3(pdpu, pstate,
-			drm_rect_width(&pdpu->pipe_cfg.src_rect),
-			drm_rect_height(&pdpu->pipe_cfg.src_rect),
-			drm_rect_width(&pdpu->pipe_cfg.dst_rect),
-			drm_rect_height(&pdpu->pipe_cfg.dst_rect),
  			&pstate->scaler3_cfg, fmt,
  			info->hsub, info->vsub);
  }
@@ -959,6 +967,7 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
  	const struct dpu_format *fmt;
  	struct drm_rect src, dst, fb_rect = { 0 };
  	uint32_t min_src_size, max_linewidth;
+	unsigned int rotation;
if (new_plane_state->crtc)
  		crtc_state = drm_atomic_get_new_crtc_state(state,
@@ -1028,6 +1037,48 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
  		return -E2BIG;
  	}
+ rotation = drm_rotation_simplify(new_plane_state->rotation,
+			    DRM_MODE_ROTATE_0 |
+			    DRM_MODE_ROTATE_90 |
+			    DRM_MODE_REFLECT_X |
+			    DRM_MODE_REFLECT_Y);
+
+	if (rotation & DRM_MODE_ROTATE_90) {
+		struct msm_drm_private *priv = plane->dev->dev_private;
+		struct dpu_kms *dpu_kms;
+		const struct msm_format *msm_fmt;
+		const struct dpu_format *fmt;
+		bool found = false;
+		u32 i, num_formats;
+		const u32 *supported_formats;
+
+		if (src.y2 > pdpu->pipe_sblk->rotation_cfg->rot_maxheight) {

Another note: drm_rect_width(&src) rather than src.y2 here.

+			DPU_DEBUG_PLANE(pdpu,
+			"invalid height for inline rot:%d max:%d\n",
+			src.y2, pdpu->pipe_sblk->rotation_cfg->rot_maxheight);
+			return -EINVAL;
+		}
+
+		/* check for valid formats supported by inline rotation */
+		dpu_kms = to_dpu_kms(priv->kms);
+		msm_fmt = msm_framebuffer_format(new_plane_state->fb);
+		fmt = to_dpu_format(msm_fmt);
+		supported_formats = pdpu->pipe_sblk->rotation_cfg->rot_format_list;
+		num_formats = pdpu->pipe_sblk->rotation_cfg->rot_num_formats;
+
+		for (i = 0; i < num_formats; i++) {
+			if (fmt->base.pixel_format == supported_formats[i] &&
+				fmt->fetch_mode == DPU_FETCH_UBWC)
+				found = true;
+		}
+
+		if (!found || !num_formats) {
+			DPU_DEBUG_PLANE(pdpu,
+			"supported_format not found num:%d\n", num_formats);
+			return -EINVAL;
+		}
+	}
+	pstate->rotation = rotation;
  	pstate->needs_qos_remap = drm_atomic_crtc_needs_modeset(crtc_state);
return 0;
@@ -1153,21 +1204,18 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
  				pstate->multirect_mode);
if (pdpu->pipe_hw->ops.setup_format) {
-		unsigned int rotation;
src_flags = 0x0; - rotation = drm_rotation_simplify(state->rotation,
-						 DRM_MODE_ROTATE_0 |
-						 DRM_MODE_REFLECT_X |
-						 DRM_MODE_REFLECT_Y);
-
-		if (rotation & DRM_MODE_REFLECT_X)
+		if (pstate->rotation & DRM_MODE_REFLECT_X)
  			src_flags |= DPU_SSPP_FLIP_LR;
- if (rotation & DRM_MODE_REFLECT_Y)
+		if (pstate->rotation & DRM_MODE_REFLECT_Y)
  			src_flags |= DPU_SSPP_FLIP_UD;
+ if (pstate->rotation & DRM_MODE_ROTATE_90)
+			src_flags |= DPU_SSPP_ROT_90;
+
  		/* update format */
  		pdpu->pipe_hw->ops.setup_format(pdpu->pipe_hw, fmt, src_flags,
  				pstate->multirect_index);
@@ -1578,6 +1626,8 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
  	int zpos_max = DPU_ZPOS_MAX;
  	uint32_t num_formats;
  	int ret = -EINVAL;
+	unsigned int supported_rotations = DRM_MODE_ROTATE_0 |
+			DRM_MODE_ROTATE_180 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
/* create and zero local structure */
  	pdpu = kzalloc(sizeof(*pdpu), GFP_KERNEL);
@@ -1647,12 +1697,11 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
  	if (ret)
  		DPU_ERROR("failed to install zpos property, rc = %d\n", ret);
+ if (pdpu->features & BIT(DPU_SSPP_INLINE_ROTATION))
+		supported_rotations |= DRM_MODE_ROTATE_90;
+
  	drm_plane_create_rotation_property(plane,
-			DRM_MODE_ROTATE_0,
-			DRM_MODE_ROTATE_0 |
-			DRM_MODE_ROTATE_180 |
-			DRM_MODE_REFLECT_X |
-			DRM_MODE_REFLECT_Y);
+		    DRM_MODE_ROTATE_0, supported_rotations);
drm_plane_enable_fb_damage_clips(plane); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
index 34e03ac..16ec8dc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
@@ -28,6 +28,7 @@
   * @cdp_cfg:	CDP configuration
   * @plane_fetch_bw: calculated BW per plane
   * @plane_clk: calculated clk per plane
+ * @rotation: simplified drm rotation hint
   */
  struct dpu_plane_state {
  	struct drm_plane_state base;
@@ -45,6 +46,7 @@ struct dpu_plane_state {
  	struct dpu_hw_pipe_cdp_cfg cdp_cfg;
  	u64 plane_fetch_bw;
  	u64 plane_clk;
+	unsigned int rotation;
  };
/**



--
With best wishes
Dmitry



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