[PATCH] media: iris: Fix encoder reference buffer size calculation

[Vishnu Reddy]

For frame widths that are not multiples of 128, such as 864, the
encoder reference buffer size is underestimated. As a result, the
firmware reports a session error when starting the encode session.

The encoder requires the reference buffer width to be aligned to 128,
but the current calculation aligns it to only 32. Align the width to
128 when calculating the reference buffer size.

Fixes: 61528e86687e ("media: iris: Allocate and queue internal buffers for encoder video device")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/qcom/iris/iris_vpu_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
index a8170e5fa9e6..2eaa2218f6a4 100644
--- a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
+++ b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
@@ -1517,7 +1517,7 @@ u32 size_enc_ref_buffer(u32 frame_width, u32 frame_height)
 {
 	u32 u_chroma_buffer_height = ALIGN(frame_height >> 1, 32);
 	u32 u_buffer_height = ALIGN(frame_height, 32);
-	u32 u_buffer_width = ALIGN(frame_width, 32);
+	u32 u_buffer_width = ALIGN(frame_width, 128);
 
 	return (u_buffer_height + u_chroma_buffer_height) * u_buffer_width;
 }

---
base-commit: 7649ba73f9e7e1e04d0b46213e39c79ae09dd55c
change-id: 20261030-fix_enc_ref_buf_calc-c0e73537063f

Best regards,
--  
Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>