Il 03/12/21 06:34, kyrie.wu ha scritto:
Add jpeg decoding worker to ensure that three HWs
run in parallel in MT8195.
Signed-off-by: kyrie.wu <kyrie.wu@xxxxxxxxxxxx>
---
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 190 +++++++++++++++++++---
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h | 5 +
drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_hw.c | 17 ++
3 files changed, 189 insertions(+), 23 deletions(-)
Hello Kyrie,
thanks for the patch! However, there are some things to improve...
diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index f2a5e84..2518660 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -1065,57 +1065,187 @@ static void mtk_jpeg_enc_device_run(void *priv)
queue_work(jpeg->workqueue, &ctx->jpeg_work);
}
-static void mtk_jpeg_dec_device_run(void *priv)
+static int mtk_jpegdec_select_hw(struct mtk_jpeg_ctx *ctx)
{
- struct mtk_jpeg_ctx *ctx = priv;
+ struct mtk_jpegdec_comp_dev *comp_jpeg;
struct mtk_jpeg_dev *jpeg = ctx->jpeg;
- struct vb2_v4l2_buffer *src_buf, *dst_buf;
- enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
unsigned long flags;
- struct mtk_jpeg_src_buf *jpeg_src_buf;
+ int hw_id = -1;
+ int i;
+
+ spin_lock_irqsave(&jpeg->hw_lock, flags);
+ for (i = 0; i < MTK_JPEGDEC_HW_MAX; i++) {
+ comp_jpeg = jpeg->dec_hw_dev[i];
+ if (comp_jpeg->hw_state == MTK_JPEG_HW_IDLE) {
+ hw_id = i;
+ comp_jpeg->hw_state = MTK_JPEG_HW_BUSY;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&jpeg->hw_lock, flags);
+
+ return hw_id;
+}
+
+static int mtk_jpegdec_deselect_hw(struct mtk_jpeg_dev *jpeg, int hw_id)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&jpeg->hw_lock, flags);
+ jpeg->dec_hw_dev[hw_id]->hw_state =
+ MTK_JPEG_HW_IDLE;
+ spin_unlock_irqrestore(&jpeg->hw_lock, flags);
+
+ return 0;
+}
+
+static int mtk_jpegdec_set_hw_param(struct mtk_jpeg_ctx *ctx,
+ int hw_id,
+ struct vb2_v4l2_buffer *src_buf,
+ struct vb2_v4l2_buffer *dst_buf)
+{
+ struct mtk_jpegdec_comp_dev *jpeg =
+ ctx->jpeg->dec_hw_dev[hw_id];
+
+ jpeg->hw_param.curr_ctx = ctx;
+ jpeg->hw_param.src_buffer = src_buf;
+ jpeg->hw_param.dst_buffer = dst_buf;
+
+ return 0;
+}
+
+static void mtk_jpegdec_worker(struct work_struct *work)
+{
+ struct mtk_jpeg_ctx *ctx = container_of(work, struct mtk_jpeg_ctx,
+ jpeg_work);
+ struct mtk_jpegdec_comp_dev *comp_jpeg[MTK_JPEGDEC_HW_MAX];
+ enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
+ struct mtk_jpeg_src_buf *jpeg_src_buf, *jpeg_dst_buf;
+ struct vb2_v4l2_buffer *src_buf, *dst_buf;
+ struct mtk_jpeg_dev *jpeg = ctx->jpeg;
+ atomic_t *hw_rdy[MTK_JPEGDEC_HW_MAX];
+ struct clk *jpegdec_clk;
+ int ret, i, hw_id = 0;
struct mtk_jpeg_bs bs;
struct mtk_jpeg_fb fb;
- int ret;
+ unsigned long flags;
+
+ for (i = 0; i < MTK_JPEGDEC_HW_MAX; i++) {
+ comp_jpeg[i] = jpeg->dec_hw_dev[i];
+ hw_rdy[i] = &comp_jpeg[i]->hw_rdy;
+ }
+
This entire retry_select block should go to a helper function instead
of being inside of here.
Also, there's a big issue with this snippet that has to be solved: you're
unconditionally calling "goto retry_select" at the end of the if branch,
but please consider the following scenario:
- mtk_jpegdec_select_hw() returns a hw_id < 0
- wait_event_interruptible returns 0
... then we redo the same, and we still get the same result.
This may generate an infinite loop!!
After putting this into a separate function, please use a controlled loop
with a well thought maximum number of retries, as to avoid this situation.
+retry_select:
+ hw_id = mtk_jpegdec_select_hw(ctx);
+ if (hw_id < 0) {
+ ret = wait_event_interruptible(jpeg->dec_hw_wq,
+ (atomic_read(hw_rdy[0]) ||
+ atomic_read(hw_rdy[1]) ||
+ atomic_read(hw_rdy[2])) > 0);
+ if (ret != 0) {
+ dev_err(jpeg->dev, "%s : %d, all HW are busy\n",
+ __func__, __LINE__);
+ v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
+ return;
+ }
+
+ dev_err(jpeg->dev, "%s : %d, NEW HW IDLE, please retry selcet!!!\n",
+ __func__, __LINE__);
+ goto retry_select;
+ }
+ atomic_dec(&comp_jpeg[hw_id]->hw_rdy);
src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ if (!src_buf) {
+ dev_err(jpeg->dev, "%s : %d, get src_buf fail !!!\n",
+ __func__, __LINE__);
+ goto getbuf_fail;
+ }
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+ if (!dst_buf) {
+ dev_err(jpeg->dev, "%s : %d, get dst_buf fail !!!\n",
+ __func__, __LINE__);
+ goto getbuf_fail;
+ }
+
jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(&src_buf->vb2_buf);
+ jpeg_dst_buf = mtk_jpeg_vb2_to_srcbuf(&dst_buf->vb2_buf);
- if (mtk_jpeg_check_resolution_change(ctx, &jpeg_src_buf->dec_param)) {
+ if (mtk_jpeg_check_resolution_change(ctx,
+ &jpeg_src_buf->dec_param)) {
Why are you breaking this line? There's no need to.
mtk_jpeg_queue_src_chg_event(ctx);
ctx->state = MTK_JPEG_SOURCE_CHANGE;
- v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
- return;
+ goto getbuf_fail;
}
Regards,
- Angelo
