[PATCH v4 07/35] media: ti-vpe: cal: add cal_ctx_prepare/unprepare

[Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>]

In the following patches we need to do context configuration which might
fail. Add new functions, cal_ctx_prepare and cal_ctx_unprepare, to
handle such configuration.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/ti-vpe/cal-video.c |  9 +++++++++
 drivers/media/platform/ti-vpe/cal.c       | 10 ++++++++++
 drivers/media/platform/ti-vpe/cal.h       |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/drivers/media/platform/ti-vpe/cal-video.c b/drivers/media/platform/ti-vpe/cal-video.c
index 9d0b515f013e..f17524579102 100644
--- a/drivers/media/platform/ti-vpe/cal-video.c
+++ b/drivers/media/platform/ti-vpe/cal-video.c
@@ -708,6 +708,12 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 		goto error_pipeline;
 	}
 
+	ret = cal_ctx_prepare(ctx);
+	if (ret) {
+		ctx_err(ctx, "Failed to prepare context: %d\n", ret);
+		goto error_pipeline;
+	}
+
 	spin_lock_irq(&ctx->dma.lock);
 	buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list);
 	ctx->dma.pending = buf;
@@ -735,6 +741,7 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 error_stop:
 	cal_ctx_stop(ctx);
 	pm_runtime_put_sync(ctx->cal->dev);
+	cal_ctx_unprepare(ctx);
 
 error_pipeline:
 	media_pipeline_stop(&ctx->vdev.entity);
@@ -754,6 +761,8 @@ static void cal_stop_streaming(struct vb2_queue *vq)
 
 	pm_runtime_put_sync(ctx->cal->dev);
 
+	cal_ctx_unprepare(ctx);
+
 	cal_release_buffers(ctx, VB2_BUF_STATE_ERROR);
 
 	media_pipeline_stop(&ctx->vdev.entity);
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 2f70725a567b..ded663f8fbfe 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -430,6 +430,16 @@ static bool cal_ctx_wr_dma_stopped(struct cal_ctx *ctx)
 	return stopped;
 }
 
+int cal_ctx_prepare(struct cal_ctx *ctx)
+{
+	return 0;
+}
+
+void cal_ctx_unprepare(struct cal_ctx *ctx)
+{
+
+}
+
 void cal_ctx_start(struct cal_ctx *ctx)
 {
 	ctx->sequence = 0;
diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h
index af46084580bd..09ad20faa9e1 100644
--- a/drivers/media/platform/ti-vpe/cal.h
+++ b/drivers/media/platform/ti-vpe/cal.h
@@ -296,6 +296,8 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
 					 unsigned int instance);
 void cal_camerarx_destroy(struct cal_camerarx *phy);
 
+int cal_ctx_prepare(struct cal_ctx *ctx);
+void cal_ctx_unprepare(struct cal_ctx *ctx);
 void cal_ctx_set_dma_addr(struct cal_ctx *ctx, dma_addr_t addr);
 void cal_ctx_start(struct cal_ctx *ctx);
 void cal_ctx_stop(struct cal_ctx *ctx);
-- 
2.25.1