[1/1] media: mediatek: jpeg: fix buffer alignment

Commit Message

Jianhua Lin April 18, 2025, 3:25 a.m. UTC

From: "jianhua.lin" <[e-mail]>

The JPEG encoder image stride register must be MCU aligned.
For YUV422, it's 32-byte aligned, and for YUV420, it's
16-byte aligned.

The minimal DCT block size is 8x8, so the vertical buffer
alignment for YUV422 is 8-byte aligned, and for YUV420,
it's 16-byte aligned.

Signed-off-by: jianhua.lin <[e-mail]>
---
 .../platform/mediatek/jpeg/mtk_jpeg_core.c    | 24 +++++++++----------
 1 file changed, 12 insertions(+), 12 deletions(-)

Patch

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index 834d2a354692..7dd652e5b6d4 100644
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -40,8 +40,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_enc_formats[] = {
 		.h_sample	= {4, 4},
 		.v_sample	= {4, 2},
 		.colplanes	= 2,
-		.h_align	= 4,
-		.v_align	= 4,
+		.h_align	= 16,
+		.v_align	= 16,
 		.flags		= MTK_JPEG_FMT_FLAG_OUTPUT,
 	},
 	{
@@ -50,8 +50,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_enc_formats[] = {
 		.h_sample	= {4, 4},
 		.v_sample	= {4, 2},
 		.colplanes	= 2,
-		.h_align	= 4,
-		.v_align	= 4,
+		.h_align	= 16,
+		.v_align	= 16,
 		.flags		= MTK_JPEG_FMT_FLAG_OUTPUT,
 	},
 	{
@@ -60,8 +60,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_enc_formats[] = {
 		.h_sample	= {8},
 		.v_sample	= {4},
 		.colplanes	= 1,
-		.h_align	= 5,
-		.v_align	= 3,
+		.h_align	= 32,
+		.v_align	= 8,
 		.flags		= MTK_JPEG_FMT_FLAG_OUTPUT,
 	},
 	{
@@ -70,8 +70,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_enc_formats[] = {
 		.h_sample	= {8},
 		.v_sample	= {4},
 		.colplanes	= 1,
-		.h_align	= 5,
-		.v_align	= 3,
+		.h_align	= 32,
+		.v_align	= 8,
 		.flags		= MTK_JPEG_FMT_FLAG_OUTPUT,
 	},
 };
@@ -87,8 +87,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_dec_formats[] = {
 		.h_sample	= {4, 2, 2},
 		.v_sample	= {4, 2, 2},
 		.colplanes	= 3,
-		.h_align	= 5,
-		.v_align	= 4,
+		.h_align	= 16,
+		.v_align	= 16,
 		.flags		= MTK_JPEG_FMT_FLAG_CAPTURE,
 	},
 	{
@@ -96,8 +96,8 @@  static struct mtk_jpeg_fmt mtk_jpeg_dec_formats[] = {
 		.h_sample	= {4, 2, 2},
 		.v_sample	= {4, 4, 4},
 		.colplanes	= 3,
-		.h_align	= 5,
-		.v_align	= 3,
+		.h_align	= 32,
+		.v_align	= 8,
 		.flags		= MTK_JPEG_FMT_FLAG_CAPTURE,
 	},
 };