linux-kernel - [RESEND PATCH v0 4/5] wave5: Use the bitstream buffer size from host.

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Date: Wed, 31 Jan 2024 10:30:45 +0900
From: "jackson.lee" <jackson.lee@...psnmedia.com>
To: mchehab@...nel.org,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	nas.chung@...psnmedia.com
Cc: jackson.lee@...psnmedia.com,
	lafley.kim@...psnmedia.com,
	b-brnich@...com
Subject: [RESEND PATCH v0 4/5] wave5: Use the bitstream buffer size from host.

In V4L2 spec, Host can set the bitstream buffer size.
Allow the larger size between default size and input size.

Signed-off-by: Jackson Lee <jackson.lee@...psnmedia.com>
Signed-off-by: Nas Chung <nas.chung@...psnmedia.com>
---
 drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
index ff73d69de41c..19018ace41b6 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
@@ -11,6 +11,10 @@
 #define VPU_ENC_DEV_NAME "C&M Wave5 VPU encoder"
 #define VPU_ENC_DRV_NAME "wave5-enc"
 
+#define DEFAULT_SRC_SIZE(width, height) ({			\
+	(width) * (height) / 8 * 3;					\
+})
+
 static const struct vpu_format enc_fmt_list[FMT_TYPES][MAX_FMTS] = {
 	[VPU_FMT_TYPE_CODEC] = {
 		{
@@ -193,7 +197,8 @@ static void wave5_update_pix_fmt(struct v4l2_pix_format_mplane *pix_mp, unsigned
 		pix_mp->width = width;
 		pix_mp->height = height;
 		pix_mp->plane_fmt[0].bytesperline = 0;
-		pix_mp->plane_fmt[0].sizeimage = width * height / 8 * 3;
+		pix_mp->plane_fmt[0].sizeimage = max(DEFAULT_SRC_SIZE(width, height),
+						     pix_mp->plane_fmt[0].sizeimage);
 		break;
 	}
 }
-- 
2.43.0