[media] v4l: vsp1: Add alpha channel support to the memory ports

Support ARGB formats on the RPF side by reading the alpha component from
memory and on the WPF side by writing it to memory.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/vsp1/vsp1_rpf.c

@@ -101,10 +101,12 @@ static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
 		       (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 		       (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 
-	/* Disable alpha, mask and color key. Set the alpha channel to a fixed
-	 * value of 255.
+	/* Use the alpha channel (extended to 8 bits) when available or a
+	 * hardcoded 255 value otherwise. Disable color keying.
 	 */
-	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_ASEL_FIXED);
+	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
+		       (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
+				       : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 	vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
 		       255 << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 	vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);

drivers/media/platform/vsp1/vsp1_video.c

@@ -50,70 +50,85 @@ static const struct vsp1_format_info vsp1_video_formats[] = {
 	{ V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 8, 0, 0 }, false, false, 1, 1 },
+	  1, { 8, 0, 0 }, false, false, 1, 1, false },
+	{ V4L2_PIX_FMT_ARGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
+	  VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+	  VI6_RPF_DSWAP_P_WDS,
+	  1, { 16, 0, 0 }, false, false, 1, 1, true },
 	{ V4L2_PIX_FMT_XRGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS,
-	  1, { 16, 0, 0 }, false, false, 1, 1 },
+	  1, { 16, 0, 0 }, false, false, 1, 1, true },
+	{ V4L2_PIX_FMT_ARGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
+	  VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+	  VI6_RPF_DSWAP_P_WDS,
+	  1, { 16, 0, 0 }, false, false, 1, 1, true },
 	{ V4L2_PIX_FMT_XRGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS,
-	  1, { 16, 0, 0 }, false, false, 1, 1 },
+	  1, { 16, 0, 0 }, false, false, 1, 1, false },
 	{ V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS,
-	  1, { 16, 0, 0 }, false, false, 1, 1 },
+	  1, { 16, 0, 0 }, false, false, 1, 1, false },
 	{ V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 24, 0, 0 }, false, false, 1, 1 },
+	  1, { 24, 0, 0 }, false, false, 1, 1, false },
 	{ V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 24, 0, 0 }, false, false, 1, 1 },
+	  1, { 24, 0, 0 }, false, false, 1, 1, false },
+	{ V4L2_PIX_FMT_ABGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
+	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
+	  1, { 32, 0, 0 }, false, false, 1, 1, true },
 	{ V4L2_PIX_FMT_XBGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
-	  1, { 32, 0, 0 }, false, false, 1, 1 },
+	  1, { 32, 0, 0 }, false, false, 1, 1, false },
+	{ V4L2_PIX_FMT_ARGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
+	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+	  1, { 32, 0, 0 }, false, false, 1, 1, true },
 	{ V4L2_PIX_FMT_XRGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
 	  VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 32, 0, 0 }, false, false, 1, 1 },
+	  1, { 32, 0, 0 }, false, false, 1, 1, false },
 	{ V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 16, 0, 0 }, false, false, 2, 1 },
+	  1, { 16, 0, 0 }, false, false, 2, 1, false },
 	{ V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 16, 0, 0 }, false, true, 2, 1 },
+	  1, { 16, 0, 0 }, false, true, 2, 1, false },
 	{ V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 16, 0, 0 }, true, false, 2, 1 },
+	  1, { 16, 0, 0 }, true, false, 2, 1, false },
 	{ V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  1, { 16, 0, 0 }, true, true, 2, 1 },
+	  1, { 16, 0, 0 }, true, true, 2, 1, false },
 	{ V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  2, { 8, 16, 0 }, false, false, 2, 2 },
+	  2, { 8, 16, 0 }, false, false, 2, 2, false },
 	{ V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  2, { 8, 16, 0 }, false, true, 2, 2 },
+	  2, { 8, 16, 0 }, false, true, 2, 2, false },
 	{ V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  2, { 8, 16, 0 }, false, false, 2, 1 },
+	  2, { 8, 16, 0 }, false, false, 2, 1, false },
 	{ V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  2, { 8, 16, 0 }, false, true, 2, 1 },
+	  2, { 8, 16, 0 }, false, true, 2, 1, false },
 	{ V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32,
 	  VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 	  VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
-	  3, { 8, 8, 8 }, false, false, 2, 2 },
+	  3, { 8, 8, 8 }, false, false, 2, 2, false },
 };
 
 /*

drivers/media/platform/vsp1/vsp1_video.h

@@ -33,6 +33,7 @@ struct vsp1_video;
  * @swap_uv: the U and V components are swapped (V comes before U)
  * @hsub: horizontal subsampling factor
  * @vsub: vertical subsampling factor
+ * @alpha: has an alpha channel
  */
 struct vsp1_format_info {
 	u32 fourcc;
@@ -45,6 +46,7 @@ struct vsp1_format_info {
 	bool swap_uv;
 	unsigned int hsub;
 	unsigned int vsub;
+	bool alpha;
 };
 
 enum vsp1_pipeline_state {

drivers/media/platform/vsp1/vsp1_wpf.c

@@ -99,6 +99,8 @@ static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
 
 		outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 
+		if (fmtinfo->alpha)
+			outfmt |= VI6_WPF_OUTFMT_PXA;
 		if (fmtinfo->swap_yc)
 			outfmt |= VI6_WPF_OUTFMT_SPYCS;
 		if (fmtinfo->swap_uv)