Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e9046097 authored by Philipp Zabel's avatar Philipp Zabel
Browse files

gpu: ipu-v3: Add ipu_idmac_get_current_buffer function 



This function returns the currently active buffer (0 or 1)
of a double buffered IDMAC channel. It is to be used by the
CSI driver.

Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 35de925f

drivers/gpu/ipu-v3/ipu-common.c

+9 −0
Original line number Diff line number Diff line
@@ -661,6 +661,15 @@ int ipu_module_disable(struct ipu_soc *ipu, u32 mask) 
}

EXPORT_SYMBOL_GPL(ipu_module_disable);



int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel)

{

	struct ipu_soc *ipu = channel->ipu;

	unsigned int chno = channel->num;



	return (ipu_cm_read(ipu, IPU_CHA_CUR_BUF(chno)) & idma_mask(chno)) ? 1 : 0;

}

EXPORT_SYMBOL_GPL(ipu_idmac_get_current_buffer);



void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num)

{

	struct ipu_soc *ipu = channel->ipu;

include/video/imx-ipu-v3.h

+1 −0
Original line number Diff line number Diff line
@@ -103,6 +103,7 @@ int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms); 


void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel,

		bool doublebuffer);

int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel);

void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num);



/*