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Commit 0a29b1ab authored by Lucas Stach's avatar Lucas Stach Committed by Philipp Zabel
Browse files

gpu: ipu-v3: pre: add double buffer status readback 



This allows the upper layers to check if a double buffer update has
been applied by the PRE or is still pending.

Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
[p.zabel@pengutronix.de: inverted logic: done -> pending]
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent a3b22b9f

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

+6 −0
Original line number Diff line number Diff line
@@ -265,6 +265,12 @@ void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr) 
	writel(IPU_PRE_CTRL_SDW_UPDATE, pre->regs + IPU_PRE_CTRL_SET);

}



bool ipu_pre_update_pending(struct ipu_pre *pre)

{

	return !!(readl_relaxed(pre->regs + IPU_PRE_CTRL) &

		  IPU_PRE_CTRL_SDW_UPDATE);

}



u32 ipu_pre_get_baddr(struct ipu_pre *pre)

{

	return (u32)pre->buffer_paddr;

drivers/gpu/ipu-v3/ipu-prv.h

+1 −0
Original line number Diff line number Diff line
@@ -272,6 +272,7 @@ void ipu_pre_configure(struct ipu_pre *pre, unsigned int width, 
		       unsigned int height, unsigned int stride, u32 format,

		       uint64_t modifier, unsigned int bufaddr);

void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr);

bool ipu_pre_update_pending(struct ipu_pre *pre);



struct ipu_prg *ipu_prg_lookup_by_phandle(struct device *dev, const char *name,

					  int ipu_id);