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Commit bce6f087 authored by Steve Longerbeam's avatar Steve Longerbeam Committed by Philipp Zabel
Browse files

gpu: ipu-v3: Add ipu_idmac_clear_buffer() 



Add the reverse of ipu_idmac_select_buffer(), that is, clear a buffer
ready status in a channel.

Signed-off-by: default avatarSteve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent aa52f578

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

+28 −0
Original line number Diff line number Diff line
@@ -357,6 +357,34 @@ void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num) 
}

EXPORT_SYMBOL_GPL(ipu_idmac_select_buffer);



void ipu_idmac_clear_buffer(struct ipuv3_channel *channel, u32 buf_num)

{

	struct ipu_soc *ipu = channel->ipu;

	unsigned int chno = channel->num;

	unsigned long flags;



	spin_lock_irqsave(&ipu->lock, flags);



	ipu_cm_write(ipu, 0xF0300000, IPU_GPR); /* write one to clear */

	switch (buf_num) {

	case 0:

		ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF0_RDY(chno));

		break;

	case 1:

		ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF1_RDY(chno));

		break;

	case 2:

		ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF2_RDY(chno));

		break;

	default:

		break;

	}

	ipu_cm_write(ipu, 0x0, IPU_GPR); /* write one to set */



	spin_unlock_irqrestore(&ipu->lock, flags);

}

EXPORT_SYMBOL_GPL(ipu_idmac_clear_buffer);



int ipu_idmac_enable_channel(struct ipuv3_channel *channel)

{

	struct ipu_soc *ipu = channel->ipu;

include/video/imx-ipu-v3.h

+1 −0
Original line number Diff line number Diff line
@@ -167,6 +167,7 @@ void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel, 
int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel);

bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num);

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

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



/*

 * IPU Channel Parameter Memory (cpmem) functions