drm/komeda: Added AFBC support for komeda driver

For supporting AFBC:
1. Check if the user requested modifier can be supported by display HW.
2. Check the obj->size with AFBC's requirement.
3. Configure HW according to the modifier (afbc features)

This patch depends on:
- https://patchwork.freedesktop.org/series/59915/
- https://patchwork.freedesktop.org/series/59000/

v2: Rebase and addressed Ayan's comments
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/display/komeda/d71/d71_component.c

@@ -134,6 +134,27 @@ static u32 to_rot_ctrl(u32 rot)
 	return lr_ctrl;
 }
 
+static u32 to_ad_ctrl(u64 modifier)
+{
+	u32 afbc_ctrl = AD_AEN;
+
+	if (!modifier)
+		return 0;
+
+	if ((modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) ==
+	    AFBC_FORMAT_MOD_BLOCK_SIZE_32x8)
+		afbc_ctrl |= AD_WB;
+
+	if (modifier & AFBC_FORMAT_MOD_YTR)
+		afbc_ctrl |= AD_YT;
+	if (modifier & AFBC_FORMAT_MOD_SPLIT)
+		afbc_ctrl |= AD_BS;
+	if (modifier & AFBC_FORMAT_MOD_TILED)
+		afbc_ctrl |= AD_TH;
+
+	return afbc_ctrl;
+}
+
 static inline u32 to_d71_input_id(struct komeda_component_output *output)
 {
 	struct komeda_component *comp = output->component;
@@ -173,6 +194,24 @@ static void d71_layer_update(struct komeda_component *c,
 			       fb->pitches[i] & 0xFFFF);
 	}
 
+	malidp_write32(reg, AD_CONTROL, to_ad_ctrl(fb->modifier));
+	if (fb->modifier) {
+		u64 addr;
+
+		malidp_write32(reg, LAYER_AD_H_CROP, HV_CROP(st->afbc_crop_l,
+							     st->afbc_crop_r));
+		malidp_write32(reg, LAYER_AD_V_CROP, HV_CROP(st->afbc_crop_t,
+							     st->afbc_crop_b));
+		/* afbc 1.2 wants payload, afbc 1.0/1.1 wants end_addr */
+		if (fb->modifier & AFBC_FORMAT_MOD_TILED)
+			addr = st->addr[0] + kfb->offset_payload;
+		else
+			addr = st->addr[0] + kfb->afbc_size - 1;
+
+		malidp_write32(reg, BLK_P1_PTR_LOW, lower_32_bits(addr));
+		malidp_write32(reg, BLK_P1_PTR_HIGH, upper_32_bits(addr));
+	}
+
 	malidp_write32(reg, LAYER_FMT, kfb->format_caps->hw_id);
 	malidp_write32(reg, BLK_IN_SIZE, HV_SIZE(st->hsize, st->vsize));
 

drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c

@@ -35,6 +35,59 @@ komeda_get_format_caps(struct komeda_format_caps_table *table,
 	return NULL;
 }
 
+/* Two assumptions
+ * 1. RGB always has YTR
+ * 2. Tiled RGB always has SC
+ */
+u64 komeda_supported_modifiers[] = {
+	/* AFBC_16x16 + features: YUV+RGB both */
+	AFBC_16x16(0),
+	/* SPARSE */
+	AFBC_16x16(_SPARSE),
+	/* YTR + (SPARSE) */
+	AFBC_16x16(_YTR | _SPARSE),
+	AFBC_16x16(_YTR),
+	/* SPLIT + SPARSE + YTR RGB only */
+	/* split mode is only allowed for sparse mode */
+	AFBC_16x16(_SPLIT | _SPARSE | _YTR),
+	/* TILED + (SPARSE) */
+	/* TILED YUV format only */
+	AFBC_16x16(_TILED | _SPARSE),
+	AFBC_16x16(_TILED),
+	/* TILED + SC + (SPLIT+SPARSE | SPARSE) + (YTR) */
+	AFBC_16x16(_TILED | _SC | _SPLIT | _SPARSE | _YTR),
+	AFBC_16x16(_TILED | _SC | _SPARSE | _YTR),
+	AFBC_16x16(_TILED | _SC | _YTR),
+	/* AFBC_32x8 + features: which are RGB formats only */
+	/* YTR + (SPARSE) */
+	AFBC_32x8(_YTR | _SPARSE),
+	AFBC_32x8(_YTR),
+	/* SPLIT + SPARSE + (YTR) */
+	/* split mode is only allowed for sparse mode */
+	AFBC_32x8(_SPLIT | _SPARSE | _YTR),
+	/* TILED + SC + (SPLIT+SPARSE | SPARSE) + YTR */
+	AFBC_32x8(_TILED | _SC | _SPLIT | _SPARSE | _YTR),
+	AFBC_32x8(_TILED | _SC | _SPARSE | _YTR),
+	AFBC_32x8(_TILED | _SC | _YTR),
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+bool komeda_format_mod_supported(struct komeda_format_caps_table *table,
+				 u32 layer_type, u32 fourcc, u64 modifier)
+{
+	const struct komeda_format_caps *caps;
+
+	caps = komeda_get_format_caps(table, fourcc, modifier);
+	if (!caps)
+		return false;
+
+	if (!(caps->supported_layer_types & layer_type))
+		return false;
+
+	return true;
+}
+
 u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
 				  u32 layer_type, u32 *n_fmts)
 {

drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h

@@ -77,6 +77,8 @@ struct komeda_format_caps_table {
 	const struct komeda_format_caps *format_caps;
 };
 
+extern u64 komeda_supported_modifiers[];
+
 const struct komeda_format_caps *
 komeda_get_format_caps(struct komeda_format_caps_table *table,
 		       u32 fourcc, u64 modifier);
@@ -86,4 +88,7 @@ u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
 
 void komeda_put_fourcc_list(u32 *fourcc_list);
 
+bool komeda_format_mod_supported(struct komeda_format_caps_table *table,
+				 u32 layer_type, u32 fourcc, u64 modifier);
+
 #endif

drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c

@@ -36,6 +36,76 @@ static const struct drm_framebuffer_funcs komeda_fb_funcs = {
 	.create_handle	= komeda_fb_create_handle,
 };
 
+static int
+komeda_fb_afbc_size_check(struct komeda_fb *kfb, struct drm_file *file,
+			  const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_framebuffer *fb = &kfb->base;
+	const struct drm_format_info *info = fb->format;
+	struct drm_gem_object *obj;
+	u32 alignment_w = 0, alignment_h = 0, alignment_header;
+	u32 n_blocks = 0, min_size = 0;
+
+	obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
+	if (!obj) {
+		DRM_DEBUG_KMS("Failed to lookup GEM object\n");
+		return -ENOENT;
+	}
+
+	switch (fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) {
+	case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8:
+		alignment_w = 32;
+		alignment_h = 8;
+		break;
+	case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16:
+		alignment_w = 16;
+		alignment_h = 16;
+		break;
+	default:
+		WARN(1, "Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n",
+		     fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK);
+		break;
+	}
+
+	/* tiled header afbc */
+	if (fb->modifier & AFBC_FORMAT_MOD_TILED) {
+		alignment_w *= AFBC_TH_LAYOUT_ALIGNMENT;
+		alignment_h *= AFBC_TH_LAYOUT_ALIGNMENT;
+		alignment_header = AFBC_TH_BODY_START_ALIGNMENT;
+	} else {
+		alignment_header = AFBC_BODY_START_ALIGNMENT;
+	}
+
+	kfb->aligned_w = ALIGN(fb->width, alignment_w);
+	kfb->aligned_h = ALIGN(fb->height, alignment_h);
+
+	if (fb->offsets[0] % alignment_header) {
+		DRM_DEBUG_KMS("afbc offset alignment check failed.\n");
+		goto check_failed;
+	}
+
+	n_blocks = (kfb->aligned_w * kfb->aligned_h) / AFBC_SUPERBLK_PIXELS;
+	kfb->offset_payload = ALIGN(n_blocks * AFBC_HEADER_SIZE,
+				    alignment_header);
+
+	kfb->afbc_size = kfb->offset_payload + n_blocks *
+			 ALIGN(info->cpp[0] * AFBC_SUPERBLK_PIXELS,
+			       AFBC_SUPERBLK_ALIGNMENT);
+	min_size = kfb->afbc_size + fb->offsets[0];
+	if (min_size > obj->size) {
+		DRM_DEBUG_KMS("afbc size check failed, obj_size: 0x%lx. min_size 0x%x.\n",
+			      obj->size, min_size);
+		goto check_failed;
+	}
+
+	fb->obj[0] = obj;
+	return 0;
+
+check_failed:
+	drm_gem_object_put_unlocked(obj);
+	return -EINVAL;
+}
+
 static int
 komeda_fb_none_afbc_size_check(struct komeda_dev *mdev, struct komeda_fb *kfb,
 			       struct drm_file *file,
@@ -118,7 +188,10 @@ komeda_fb_create(struct drm_device *dev, struct drm_file *file,
 
 	drm_helper_mode_fill_fb_struct(dev, &kfb->base, mode_cmd);
 
-	ret = komeda_fb_none_afbc_size_check(mdev, kfb, file, mode_cmd);
+	if (kfb->base.modifier)
+		ret = komeda_fb_afbc_size_check(kfb, file, mode_cmd);
+	else
+		ret = komeda_fb_none_afbc_size_check(mdev, kfb, file, mode_cmd);
 	if (ret < 0)
 		goto err_cleanup;
 

drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h

@@ -25,6 +25,10 @@ struct komeda_fb {
 	u32 aligned_w;
 	/** @aligned_h: aligned frame buffer height */
 	u32 aligned_h;
+	/** @afbc_size: minimum size of afbc */
+	u32 afbc_size;
+	/** @offset_payload: start of afbc body buffer */
+	u32 offset_payload;
 };
 
 #define to_kfb(dfb)	container_of(dfb, struct komeda_fb, base)

drivers/gpu/drm/arm/display/komeda/komeda_kms.c

@@ -148,7 +148,7 @@ static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
 	config->min_height	= 0;
 	config->max_width	= 4096;
 	config->max_height	= 4096;
-	config->allow_fb_modifiers = false;
+	config->allow_fb_modifiers = true;
 
 	config->funcs = &komeda_mode_config_funcs;
 	config->helper_private = &komeda_mode_config_helpers;

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h

@@ -235,6 +235,10 @@ struct komeda_layer_state {
 	/* layer specific configuration state */
 	u16 hsize, vsize;
 	u32 rot;
+	u16 afbc_crop_l;
+	u16 afbc_crop_r;
+	u16 afbc_crop_t;
+	u16 afbc_crop_b;
 	dma_addr_t addr[3];
 };
 

drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c

@@ -291,8 +291,22 @@ komeda_layer_validate(struct komeda_layer *layer,
 	st = to_layer_st(c_st);
 
 	st->rot = dflow->rot;
-	st->hsize = kfb->aligned_w;
-	st->vsize = kfb->aligned_h;
+
+	if (fb->modifier) {
+		st->hsize = kfb->aligned_w;
+		st->vsize = kfb->aligned_h;
+		st->afbc_crop_l = dflow->in_x;
+		st->afbc_crop_r = kfb->aligned_w - dflow->in_x - dflow->in_w;
+		st->afbc_crop_t = dflow->in_y;
+		st->afbc_crop_b = kfb->aligned_h - dflow->in_y - dflow->in_h;
+	} else {
+		st->hsize = dflow->in_w;
+		st->vsize = dflow->in_h;
+		st->afbc_crop_l = 0;
+		st->afbc_crop_r = 0;
+		st->afbc_crop_t = 0;
+		st->afbc_crop_b = 0;
+	}
 
 	for (i = 0; i < fb->format->num_planes; i++)
 		st->addr[i] = komeda_fb_get_pixel_addr(kfb, dflow->in_x,

drivers/gpu/drm/arm/display/komeda/komeda_plane.c

@@ -151,6 +151,18 @@ komeda_plane_atomic_destroy_state(struct drm_plane *plane,
 	kfree(to_kplane_st(state));
 }
 
+static bool
+komeda_plane_format_mod_supported(struct drm_plane *plane,
+				  u32 format, u64 modifier)
+{
+	struct komeda_dev *mdev = plane->dev->dev_private;
+	struct komeda_plane *kplane = to_kplane(plane);
+	u32 layer_type = kplane->layer->layer_type;
+
+	return komeda_format_mod_supported(&mdev->fmt_tbl, layer_type,
+					   format, modifier);
+}
+
 static const struct drm_plane_funcs komeda_plane_funcs = {
 	.update_plane		= drm_atomic_helper_update_plane,
 	.disable_plane		= drm_atomic_helper_disable_plane,
@@ -158,6 +170,7 @@ static const struct drm_plane_funcs komeda_plane_funcs = {
 	.reset			= komeda_plane_reset,
 	.atomic_duplicate_state	= komeda_plane_atomic_duplicate_state,
 	.atomic_destroy_state	= komeda_plane_atomic_destroy_state,
+	.format_mod_supported	= komeda_plane_format_mod_supported,
 };
 
 /* for komeda, which is pipeline can be share between crtcs */
@@ -210,7 +223,7 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
 	err = drm_universal_plane_init(&kms->base, plane,
 			get_possible_crtcs(kms, c->pipeline),
 			&komeda_plane_funcs,
-			formats, n_formats, NULL,
+			formats, n_formats, komeda_supported_modifiers,
 			get_plane_type(kms, c),
 			"%s", c->name);