On Wed, 2017-04-05 at 15:09 +0200, Lucas Stach wrote:
> As long as only one CODA context is running we get alternating device_run()
> and wait_for_completion() calls, but when more then one CODA context is
> active, other VDOA slots can be inserted between those calls for one context.
>
> Make sure to wait on job completion before running a different context and
> before destroying the currently active context.
>
> Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
Reviewed-by: Philipp Zabel <p.za...@pengutronix.de>
> ---
> drivers/media/platform/coda/imx-vdoa.c | 49
> +++++++++++++++++++++++-----------
> 1 file changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/platform/coda/imx-vdoa.c
> b/drivers/media/platform/coda/imx-vdoa.c
> index 67fd8ffa60a4..ab69a0a9d38b 100644
> --- a/drivers/media/platform/coda/imx-vdoa.c
> +++ b/drivers/media/platform/coda/imx-vdoa.c
> @@ -101,6 +101,8 @@ struct vdoa_ctx {
> struct vdoa_data *vdoa;
> struct completion completion;
> struct vdoa_q_data q_data[2];
> + unsigned int submitted_job;
> + unsigned int completed_job;
> };
>
> static irqreturn_t vdoa_irq_handler(int irq, void *data)
> @@ -114,7 +116,7 @@ static irqreturn_t vdoa_irq_handler(int irq, void *data)
>
> curr_ctx = vdoa->curr_ctx;
> if (!curr_ctx) {
> - dev_dbg(vdoa->dev,
> + dev_warn(vdoa->dev,
> "Instance released before the end of transaction\n");
> return IRQ_HANDLED;
> }
> @@ -127,19 +129,44 @@ static irqreturn_t vdoa_irq_handler(int irq, void *data)
> } else if (!(val & VDOAIST_EOT)) {
> dev_warn(vdoa->dev, "Spurious interrupt\n");
> }
> + curr_ctx->completed_job++;
> complete(&curr_ctx->completion);
>
> return IRQ_HANDLED;
> }
>
> +int vdoa_wait_for_completion(struct vdoa_ctx *ctx)
> +{
> + struct vdoa_data *vdoa = ctx->vdoa;
> +
> + if (ctx->submitted_job == ctx->completed_job)
> + return 0;
> +
> + if (!wait_for_completion_timeout(&ctx->completion,
> + msecs_to_jiffies(300))) {
> + dev_err(vdoa->dev,
> + "Timeout waiting for transfer result\n");
> + return -ETIMEDOUT;
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(vdoa_wait_for_completion);
> +
> void vdoa_device_run(struct vdoa_ctx *ctx, dma_addr_t dst, dma_addr_t src)
> {
> struct vdoa_q_data *src_q_data, *dst_q_data;
> struct vdoa_data *vdoa = ctx->vdoa;
> u32 val;
>
> + if (vdoa->curr_ctx)
> + vdoa_wait_for_completion(vdoa->curr_ctx);
> +
> vdoa->curr_ctx = ctx;
>
> + reinit_completion(&ctx->completion);
> + ctx->submitted_job++;
> +
> src_q_data = &ctx->q_data[V4L2_M2M_SRC];
> dst_q_data = &ctx->q_data[V4L2_M2M_DST];
>
> @@ -177,21 +204,6 @@ void vdoa_device_run(struct vdoa_ctx *ctx, dma_addr_t
> dst, dma_addr_t src)
> }
> EXPORT_SYMBOL(vdoa_device_run);
>
> -int vdoa_wait_for_completion(struct vdoa_ctx *ctx)
> -{
> - struct vdoa_data *vdoa = ctx->vdoa;
> -
> - if (!wait_for_completion_timeout(&ctx->completion,
> - msecs_to_jiffies(300))) {
> - dev_err(vdoa->dev,
> - "Timeout waiting for transfer result\n");
> - return -ETIMEDOUT;
> - }
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(vdoa_wait_for_completion);
> -
> struct vdoa_ctx *vdoa_context_create(struct vdoa_data *vdoa)
> {
> struct vdoa_ctx *ctx;
> @@ -218,6 +230,11 @@ void vdoa_context_destroy(struct vdoa_ctx *ctx)
> {
> struct vdoa_data *vdoa = ctx->vdoa;
>
> + if (vdoa->curr_ctx == ctx) {
> + vdoa_wait_for_completion(vdoa->curr_ctx);
> + vdoa->curr_ctx = NULL;
> + }
> +
> clk_disable_unprepare(vdoa->vdoa_clk);
> kfree(ctx);
> }
