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This ensures user buffers are utilized as soon as possible, improving efficiency and reducing the number of discarded frames at stream start. For example: - 2 pending buffers: both slots use pending buffers - 1 pending buffer: first slot uses pending, second uses discard - 0 pending buffers: both slots use discard buffers Signed-off-by: Guoniu Zhou --- drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c index 2405baf21594cd18cf2b349234313c5e103b7802..53f4f74369f7855fe6b6f372294ee569f40a8ae6 100644 --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c @@ -786,13 +786,14 @@ static void mxc_isi_video_queue_first_buffers(struct mxc_isi_video *video) : list_is_singular(&video->out_pending) ? 1 : 0; + /* Queue buffers: prioritize pending buffers, then discard buffers */ for (i = 0; i < 2; ++i) { enum mxc_isi_buf_id buf_id = i == 0 ? MXC_ISI_BUF1 : MXC_ISI_BUF2; struct mxc_isi_buffer *buf; struct list_head *list; - list = i < discard ? &video->out_discard : &video->out_pending; + list = (i < 2 - discard) ? &video->out_pending : &video->out_discard; buf = list_first_entry(list, struct mxc_isi_buffer, list); mxc_isi_channel_set_outbuf(video->pipe, buf->dma_addrs, buf_id); -- 2.34.1