linux-kernel - [PATCH] vimc: debayer: Add support for ARGB format

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Date:   Fri, 29 May 2020 00:27:17 +0530
From:   Kaaira Gupta <kgupta@...iitr.ac.in>
To:     Helen Koike <helen.koike@...labora.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        kieran.bingham@...asonboard.com
Subject: [PATCH] vimc: debayer: Add support for ARGB format

Running qcam for pixelformat 0x34324142 showed that vimc debayer does
not support it. Hence, add the support for Alpha (255).

Signed-off-by: Kaaira Gupta <kgupta@...iitr.ac.in>
---
 .../media/test-drivers/vimc/vimc-debayer.c    | 27 ++++++++++++-------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/media/test-drivers/vimc/vimc-debayer.c b/drivers/media/test-drivers/vimc/vimc-debayer.c
index c3f6fef34f68..f34148717a40 100644
--- a/drivers/media/test-drivers/vimc/vimc-debayer.c
+++ b/drivers/media/test-drivers/vimc/vimc-debayer.c
@@ -62,6 +62,7 @@ static const u32 vimc_deb_src_mbus_codes[] = {
 	MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
 	MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
 	MEDIA_BUS_FMT_RGB888_1X32_PADHI,
+	MEDIA_BUS_FMT_ARGB8888_1X32
 };
 
 static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = {
@@ -322,15 +323,23 @@ static void vimc_deb_process_rgb_frame(struct vimc_deb_device *vdeb,
 	unsigned int i, index;
 
 	vpix = vimc_pix_map_by_code(vdeb->src_code);
-	index = VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3);
-	for (i = 0; i < 3; i++) {
-		switch (vpix->pixelformat) {
-		case V4L2_PIX_FMT_RGB24:
-			vdeb->src_frame[index + i] = rgb[i];
-			break;
-		case V4L2_PIX_FMT_BGR24:
-			vdeb->src_frame[index + i] = rgb[2 - i];
-			break;
+
+	if (vpix->pixelformat == V4L2_PIX_FMT_ARGB32) {
+		index =  VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 4);
+		vdeb->src_frame[index] = 255;
+		for (i = 0; i < 3; i++)
+			vdeb->src_frame[index + i + 1] = rgb[i];
+	} else {
+		index =  VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3);
+		for (i = 0; i < 3; i++) {
+			switch (vpix->pixelformat) {
+			case V4L2_PIX_FMT_RGB24:
+				vdeb->src_frame[index + i] = rgb[i];
+				break;
+			case V4L2_PIX_FMT_BGR24:
+				vdeb->src_frame[index + i] = rgb[2 - i];
+				break;
+			}
 		}
 	}
 }
-- 
2.17.1