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media: rockchip/rga: Fix broken .start_streaming 

Currently, rga_buf_start_streaming() is expecting
pm_runtime_get_sync to return zero on success, which
is wrong.

As per the documentation, pm_runtime_get_sync increments
the device's usage counter and return its result.
This means it will typically return a positive integer
on success and a negative error code.

Therefore, rockchip-rga driver is currently unusable
failing to start_streaming in most cases. Fix it and
while here, cleanup the buffer return-to-core logic.

Fixes: f7e7b48e6d ("[media] rockchip/rga: v4l2 m2m support")

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Jacob Chen <jacob-chen@iotwrt.com>
[hans.verkuil@cisco.com: fix line over 80 cols warning]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia 2018-06-01 15:49:51 -04:00 committed by Mauro Carvalho Chehab
parent 1946117b8f
commit 9aecc03555
1 changed files with 25 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/media/platform/rockchip/rga/rga-buf.c
View File

@ -64,31 +64,10 @@ static void rga_buf_queue(struct vb2_buffer *vb)
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}
static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
static void rga_buf_return_buffers(struct vb2_queue *q,
enum vb2_buffer_state state)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
int ret, i;
ret = pm_runtime_get_sync(rga->dev);
if (!ret)
return 0;
for (i = 0; i < q->num_buffers; ++i) {
if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE) {
v4l2_m2m_buf_done(to_vb2_v4l2_buffer(q->bufs[i]),
VB2_BUF_STATE_QUEUED);
}
}
return ret;
}
static void rga_buf_stop_streaming(struct vb2_queue *q)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
struct vb2_v4l2_buffer *vbuf;
for (;;) {
@ -98,9 +77,31 @@ static void rga_buf_stop_streaming(struct vb2_queue *q)
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf)
break;
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
v4l2_m2m_buf_done(vbuf, state);
}
}
static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
int ret;
ret = pm_runtime_get_sync(rga->dev);
if (ret < 0) {
rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
return ret;
}
return 0;
}
static void rga_buf_stop_streaming(struct vb2_queue *q)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
rga_buf_return_buffers(q, VB2_BUF_STATE_ERROR);
pm_runtime_put(rga->dev);
}