drm/exynos: added vp scaling feature for hdmi

This patch adds vp scaling feature for exynos hdmi. Scaling ratio
between source and destination is used for width and height.
Also meaningless variables to set registers are cleaned.
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_mixer.c

@@ -54,6 +54,8 @@ struct hdmi_win_data {
 	unsigned int		fb_y;
 	unsigned int		fb_width;
 	unsigned int		fb_height;
+	unsigned int		src_width;
+	unsigned int		src_height;
 	unsigned int		mode_width;
 	unsigned int		mode_height;
 	unsigned int		scan_flags;
@@ -351,10 +353,7 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 	struct mixer_resources *res = &ctx->mixer_res;
 	unsigned long flags;
 	struct hdmi_win_data *win_data;
-	unsigned int full_width, full_height, width, height;
 	unsigned int x_ratio, y_ratio;
-	unsigned int src_x_offset, src_y_offset, dst_x_offset, dst_y_offset;
-	unsigned int mode_width, mode_height;
 	unsigned int buf_num;
 	dma_addr_t luma_addr[2], chroma_addr[2];
 	bool tiled_mode = false;
@@ -381,21 +380,9 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 		return;
 	}
 
-	full_width = win_data->fb_width;
-	full_height = win_data->fb_height;
-	width = win_data->crtc_width;
-	height = win_data->crtc_height;
-	mode_width = win_data->mode_width;
-	mode_height = win_data->mode_height;
-
 	/* scaling feature: (src << 16) / dst */
-	x_ratio = (width << 16) / width;
-	y_ratio = (height << 16) / height;
-
-	src_x_offset = win_data->fb_x;
-	src_y_offset = win_data->fb_y;
-	dst_x_offset = win_data->crtc_x;
-	dst_y_offset = win_data->crtc_y;
+	x_ratio = (win_data->src_width << 16) / win_data->crtc_width;
+	y_ratio = (win_data->src_height << 16) / win_data->crtc_height;
 
 	if (buf_num == 2) {
 		luma_addr[0] = win_data->dma_addr;
@@ -403,7 +390,7 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 	} else {
 		luma_addr[0] = win_data->dma_addr;
 		chroma_addr[0] = win_data->dma_addr
-			+ (full_width * full_height);
+			+ (win_data->fb_width * win_data->fb_height);
 	}
 
 	if (win_data->scan_flags & DRM_MODE_FLAG_INTERLACE) {
@@ -412,8 +399,8 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 			luma_addr[1] = luma_addr[0] + 0x40;
 			chroma_addr[1] = chroma_addr[0] + 0x40;
 		} else {
-			luma_addr[1] = luma_addr[0] + full_width;
-			chroma_addr[1] = chroma_addr[0] + full_width;
+			luma_addr[1] = luma_addr[0] + win_data->fb_width;
+			chroma_addr[1] = chroma_addr[0] + win_data->fb_width;
 		}
 	} else {
 		ctx->interlace = false;
@@ -434,26 +421,26 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 	vp_reg_writemask(res, VP_MODE, val, VP_MODE_FMT_MASK);
 
 	/* setting size of input image */
-	vp_reg_write(res, VP_IMG_SIZE_Y, VP_IMG_HSIZE(full_width) |
-		VP_IMG_VSIZE(full_height));
+	vp_reg_write(res, VP_IMG_SIZE_Y, VP_IMG_HSIZE(win_data->fb_width) |
+		VP_IMG_VSIZE(win_data->fb_height));
 	/* chroma height has to reduced by 2 to avoid chroma distorions */
-	vp_reg_write(res, VP_IMG_SIZE_C, VP_IMG_HSIZE(full_width) |
-		VP_IMG_VSIZE(full_height / 2));
+	vp_reg_write(res, VP_IMG_SIZE_C, VP_IMG_HSIZE(win_data->fb_width) |
+		VP_IMG_VSIZE(win_data->fb_height / 2));
 
-	vp_reg_write(res, VP_SRC_WIDTH, width);
-	vp_reg_write(res, VP_SRC_HEIGHT, height);
+	vp_reg_write(res, VP_SRC_WIDTH, win_data->src_width);
+	vp_reg_write(res, VP_SRC_HEIGHT, win_data->src_height);
 	vp_reg_write(res, VP_SRC_H_POSITION,
-			VP_SRC_H_POSITION_VAL(src_x_offset));
-	vp_reg_write(res, VP_SRC_V_POSITION, src_y_offset);
+			VP_SRC_H_POSITION_VAL(win_data->fb_x));
+	vp_reg_write(res, VP_SRC_V_POSITION, win_data->fb_y);
 
-	vp_reg_write(res, VP_DST_WIDTH, width);
-	vp_reg_write(res, VP_DST_H_POSITION, dst_x_offset);
+	vp_reg_write(res, VP_DST_WIDTH, win_data->crtc_width);
+	vp_reg_write(res, VP_DST_H_POSITION, win_data->crtc_x);
 	if (ctx->interlace) {
-		vp_reg_write(res, VP_DST_HEIGHT, height / 2);
-		vp_reg_write(res, VP_DST_V_POSITION, dst_y_offset / 2);
+		vp_reg_write(res, VP_DST_HEIGHT, win_data->crtc_height / 2);
+		vp_reg_write(res, VP_DST_V_POSITION, win_data->crtc_y / 2);
 	} else {
-		vp_reg_write(res, VP_DST_HEIGHT, height);
-		vp_reg_write(res, VP_DST_V_POSITION, dst_y_offset);
+		vp_reg_write(res, VP_DST_HEIGHT, win_data->crtc_height);
+		vp_reg_write(res, VP_DST_V_POSITION, win_data->crtc_y);
 	}
 
 	vp_reg_write(res, VP_H_RATIO, x_ratio);
@@ -467,8 +454,8 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
 	vp_reg_write(res, VP_TOP_C_PTR, chroma_addr[0]);
 	vp_reg_write(res, VP_BOT_C_PTR, chroma_addr[1]);
 
-	mixer_cfg_scan(ctx, mode_height);
-	mixer_cfg_rgb_fmt(ctx, mode_height);
+	mixer_cfg_scan(ctx, win_data->mode_height);
+	mixer_cfg_rgb_fmt(ctx, win_data->mode_height);
 	mixer_cfg_layer(ctx, win, true);
 	mixer_run(ctx);
 
@@ -483,10 +470,8 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 	struct mixer_resources *res = &ctx->mixer_res;
 	unsigned long flags;
 	struct hdmi_win_data *win_data;
-	unsigned int full_width, width, height;
 	unsigned int x_ratio, y_ratio;
 	unsigned int src_x_offset, src_y_offset, dst_x_offset, dst_y_offset;
-	unsigned int mode_width, mode_height;
 	dma_addr_t dma_addr;
 	unsigned int fmt;
 	u32 val;
@@ -509,26 +494,17 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 		fmt = ARGB8888;
 	}
 
-	dma_addr = win_data->dma_addr;
-	full_width = win_data->fb_width;
-	width = win_data->crtc_width;
-	height = win_data->crtc_height;
-	mode_width = win_data->mode_width;
-	mode_height = win_data->mode_height;
-
 	/* 2x scaling feature */
 	x_ratio = 0;
 	y_ratio = 0;
 
-	src_x_offset = win_data->fb_x;
-	src_y_offset = win_data->fb_y;
 	dst_x_offset = win_data->crtc_x;
 	dst_y_offset = win_data->crtc_y;
 
 	/* converting dma address base and source offset */
-	dma_addr = dma_addr
-		+ (src_x_offset * win_data->bpp >> 3)
-		+ (src_y_offset * full_width * win_data->bpp >> 3);
+	dma_addr = win_data->dma_addr
+		+ (win_data->fb_x * win_data->bpp >> 3)
+		+ (win_data->fb_y * win_data->fb_width * win_data->bpp >> 3);
 	src_x_offset = 0;
 	src_y_offset = 0;
 
@@ -545,10 +521,10 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 		MXR_GRP_CFG_FORMAT_VAL(fmt), MXR_GRP_CFG_FORMAT_MASK);
 
 	/* setup geometry */
-	mixer_reg_write(res, MXR_GRAPHIC_SPAN(win), full_width);
+	mixer_reg_write(res, MXR_GRAPHIC_SPAN(win), win_data->fb_width);
 
-	val  = MXR_GRP_WH_WIDTH(width);
-	val |= MXR_GRP_WH_HEIGHT(height);
+	val  = MXR_GRP_WH_WIDTH(win_data->crtc_width);
+	val |= MXR_GRP_WH_HEIGHT(win_data->crtc_height);
 	val |= MXR_GRP_WH_H_SCALE(x_ratio);
 	val |= MXR_GRP_WH_V_SCALE(y_ratio);
 	mixer_reg_write(res, MXR_GRAPHIC_WH(win), val);
@@ -566,8 +542,8 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 	/* set buffer address to mixer */
 	mixer_reg_write(res, MXR_GRAPHIC_BASE(win), dma_addr);
 
-	mixer_cfg_scan(ctx, mode_height);
-	mixer_cfg_rgb_fmt(ctx, mode_height);
+	mixer_cfg_scan(ctx, win_data->mode_height);
+	mixer_cfg_rgb_fmt(ctx, win_data->mode_height);
 	mixer_cfg_layer(ctx, win, true);
 	mixer_run(ctx);
 
@@ -795,6 +771,8 @@ static void mixer_win_mode_set(void *ctx,
 	win_data->fb_y = overlay->fb_y;
 	win_data->fb_width = overlay->fb_width;
 	win_data->fb_height = overlay->fb_height;
+	win_data->src_width = overlay->src_width;
+	win_data->src_height = overlay->src_height;
 
 	win_data->mode_width = overlay->mode_width;
 	win_data->mode_height = overlay->mode_height;