The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

d8a46bc4e1e0 ("media: s5p-mfc: Fix to handle reference queue during finishing")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From d8a46bc4e1e0446459daa77c4ce14218d32dacf9 Mon Sep 17 00:00:00 2001 From: Smitha T Murthy smitha.t@samsung.com Date: Wed, 7 Sep 2022 16:02:27 +0530 Subject: [PATCH] media: s5p-mfc: Fix to handle reference queue during finishing

On receiving last buffer driver puts MFC to MFCINST_FINISHING state which in turn skips transferring of frame from SRC to REF queue. This causes driver to stop MFC encoding and last frame is lost.

This patch guarantees safe handling of frames during MFCINST_FINISHING and correct clearing of workbit to avoid early stopping of encoding.

Fixes: af9357467810 ("[media] MFC: Add MFC 5.1 V4L2 driver")

Cc: stable@vger.kernel.org Cc: linux-fsd@tesla.com Signed-off-by: Smitha T Murthy smitha.t@samsung.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl

diff --git a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c index b65e506665af..f62703cebb77 100644 --- a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c +++ b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c @@ -1218,6 +1218,7 @@ static int enc_post_frame_start(struct s5p_mfc_ctx *ctx) unsigned long mb_y_addr, mb_c_addr; int slice_type; unsigned int strm_size; + bool src_ready;

slice_type = s5p_mfc_hw_call(dev->mfc_ops, get_enc_slice_type, dev); strm_size = s5p_mfc_hw_call(dev->mfc_ops, get_enc_strm_size, dev); @@ -1257,7 +1258,8 @@ static int enc_post_frame_start(struct s5p_mfc_ctx *ctx) } } } - if ((ctx->src_queue_cnt > 0) && (ctx->state == MFCINST_RUNNING)) { + if (ctx->src_queue_cnt > 0 && (ctx->state == MFCINST_RUNNING || + ctx->state == MFCINST_FINISHING)) { mb_entry = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list); if (mb_entry->flags & MFC_BUF_FLAG_USED) { @@ -1288,7 +1290,13 @@ static int enc_post_frame_start(struct s5p_mfc_ctx *ctx) vb2_set_plane_payload(&mb_entry->b->vb2_buf, 0, strm_size); vb2_buffer_done(&mb_entry->b->vb2_buf, VB2_BUF_STATE_DONE); } - if ((ctx->src_queue_cnt == 0) || (ctx->dst_queue_cnt == 0)) + + src_ready = true; + if (ctx->state == MFCINST_RUNNING && ctx->src_queue_cnt == 0) + src_ready = false; + if (ctx->state == MFCINST_FINISHING && ctx->ref_queue_cnt == 0) + src_ready = false; + if (!src_ready || ctx->dst_queue_cnt == 0) clear_work_bit(ctx);

return 0;