diff options
| author | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2021-06-14 13:23:43 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-07-12 14:22:11 +0200 |
| commit | 9eaca40c0d13a21848b5a35dc8c37dc3690a4ff1 (patch) | |
| tree | 62348e1dd558a8bc3023ebdccfc6a3481782a075 /drivers/media/platform/ti-vpe | |
| parent | 6cb0eee34c24b0052da554ff2ef9def8a10bbf96 (diff) | |
media: ti-vpe: cal: add camerarx enable/disable refcounting
The following patches add multistream support and we will have multiple
video devices using the same camerarx instances. Thus we need
enable/disable refcounting for the camerarx.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/platform/ti-vpe')
| -rw-r--r-- | drivers/media/platform/ti-vpe/cal-camerarx.c | 10 | ||||
| -rw-r--r-- | drivers/media/platform/ti-vpe/cal.h | 3 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c index f799047c70f7..79ebad139289 100644 --- a/drivers/media/platform/ti-vpe/cal-camerarx.c +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c @@ -285,6 +285,11 @@ static int cal_camerarx_start(struct cal_camerarx *phy) u32 val; int ret; + if (phy->enable_count > 0) { + phy->enable_count++; + return 0; + } + link_freq = cal_camerarx_get_ext_link_freq(phy); if (link_freq < 0) return link_freq; @@ -409,6 +414,8 @@ static int cal_camerarx_start(struct cal_camerarx *phy) /* Finally, enable the PHY Protocol Interface (PPI). */ cal_camerarx_ppi_enable(phy); + phy->enable_count++; + return 0; } @@ -416,6 +423,9 @@ static void cal_camerarx_stop(struct cal_camerarx *phy) { int ret; + if (--phy->enable_count > 0) + return; + cal_camerarx_ppi_disable(phy); cal_camerarx_disable_irqs(phy); diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h index cf0b8f5d4378..006374be3f9f 100644 --- a/drivers/media/platform/ti-vpe/cal.h +++ b/drivers/media/platform/ti-vpe/cal.h @@ -167,8 +167,11 @@ struct cal_camerarx { /* * Lock for camerarx ops. Protects: * - formats + * - enable_count */ struct mutex mutex; + + unsigned int enable_count; }; struct cal_dev { |