Commit 9eaca40c authored by Tomi Valkeinen's avatar Tomi Valkeinen Committed by Mauro Carvalho Chehab
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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: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 6cb0eee3

drivers/media/platform/ti-vpe/cal-camerarx.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

drivers/media/platform/ti-vpe/cal.h

+3 −0
Original line number Diff line number Diff line
@@ -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 {