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media: ti-vpe: cal: add camerarx enable/disable refcounting

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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>
This commit is contained in:
Tomi Valkeinen 2021-06-14 13:23:43 +02:00 committed by Mauro Carvalho Chehab
parent 6cb0eee34c
commit 9eaca40c0d
2 changed files with 13 additions and 0 deletions
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10
drivers/media/platform/ti-vpe/cal-camerarx.c
View File

@ -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);

3
drivers/media/platform/ti-vpe/cal.h
View File

@ -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 {