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[media] v4l: vsp1: Set the alpha value manually in RPF and WPF s_stream handlers 

The RPF and WPF alpha values are set through V4L2 controls and applied
when starting the video stream by a call to v4l2_ctrl_handler_setup().
As that function uses the control handler mutex it can't be called in
interrupt context, where the VSP+DU pipeline handler might need to
reconfigure the pipeline.

Set the alpha value manually in the RPF and WPF s_stream handler to
ensure that the hardware is properly configured even when controlled
without the userspace API. If the userspace API is enabled protect that
with the control lock to avoid race conditions with userspace.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Laurent Pinchart 2015-08-05 16:57:35 -03:00 committed by Mauro Carvalho Chehab
parent 96bfa6a5fd
commit 3dbb610014
3 changed files with 20 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/media/platform/vsp1/vsp1_rpf.c
View File

@ -68,7 +68,9 @@ static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
struct vsp1_rwpf *rpf = to_rwpf(subdev);
struct vsp1_device *vsp1 = rpf->entity.vsp1;
const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
const struct v4l2_pix_format_mplane *format = &rpf->format;
const struct v4l2_rect *crop = &rpf->crop;
@ -148,6 +150,15 @@ static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
(fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
: VI6_RPF_ALPH_SEL_ASEL_FIXED));
if (vsp1->pdata.uapi)
mutex_lock(rpf->ctrls.lock);
vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
rpf->alpha->cur.val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, rpf->alpha->cur.val);
if (vsp1->pdata.uapi)
mutex_unlock(rpf->ctrls.lock);
vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
@ -245,7 +256,8 @@ struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&rpf->ctrls, 1);
v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
rpf->alpha = v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops,
V4L2_CID_ALPHA_COMPONENT,
0, 255, 1, 255);
rpf->entity.subdev.ctrl_handler = &rpf->ctrls;

2
drivers/media/platform/vsp1/vsp1_rwpf.h
View File

@ -23,6 +23,7 @@
#define RWPF_PAD_SINK 0
#define RWPF_PAD_SOURCE 1
struct v4l2_ctrl;
struct vsp1_rwpf;
struct vsp1_video;
@ -40,6 +41,7 @@ struct vsp1_rwpf_operations {
struct vsp1_rwpf {
struct vsp1_entity entity;
struct v4l2_ctrl_handler ctrls;
struct v4l2_ctrl *alpha;
struct vsp1_video *video;

5
drivers/media/platform/vsp1/vsp1_wpf.c
View File

@ -156,7 +156,7 @@ static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
*/
if (vsp1->pdata.uapi)
mutex_lock(wpf->ctrls.lock);
outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
outfmt |= wpf->alpha->cur.val << VI6_WPF_OUTFMT_PDV_SHIFT;
vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
if (vsp1->pdata.uapi)
mutex_unlock(wpf->ctrls.lock);
@ -254,7 +254,8 @@ struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&wpf->ctrls, 1);
v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
wpf->alpha = v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops,
V4L2_CID_ALPHA_COMPONENT,
0, 255, 1, 255);
wpf->entity.subdev.ctrl_handler = &wpf->ctrls;