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Commit a2be35e3 authored by Steve Longerbeam's avatar Steve Longerbeam Committed by Philipp Zabel
Browse files

gpu: ipu-v3: smfc: Add ipu_smfc_set_watermark() 



Adds ipu_smfc_set_watermark() which programs a channel's SMFC FIFO
levels at which the watermark signal is set and cleared.

Signed-off-by: default avatarSteve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 7fafa8f0

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

+20 −0
Original line number Diff line number Diff line
@@ -80,6 +80,26 @@ int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id) 
}

EXPORT_SYMBOL_GPL(ipu_smfc_map_channel);



int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level)

{

	struct ipu_smfc_priv *priv = smfc->priv;

	unsigned long flags;

	u32 val, shift;



	spin_lock_irqsave(&priv->lock, flags);



	shift = smfc->chno * 6 + (smfc->chno > 1 ? 4 : 0);

	val = readl(priv->base + SMFC_WMC);

	val &= ~(0x3f << shift);

	val |= ((clr_level << 3) | set_level) << shift;

	writel(val, priv->base + SMFC_WMC);



	spin_unlock_irqrestore(&priv->lock, flags);



	return 0;

}

EXPORT_SYMBOL_GPL(ipu_smfc_set_watermark);



int ipu_smfc_enable(struct ipu_smfc *smfc)

{

	struct ipu_smfc_priv *priv = smfc->priv;

include/video/imx-ipu-v3.h

+1 −0
Original line number Diff line number Diff line
@@ -296,6 +296,7 @@ int ipu_smfc_enable(struct ipu_smfc *smfc); 
int ipu_smfc_disable(struct ipu_smfc *smfc);

int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id);

int ipu_smfc_set_burstsize(struct ipu_smfc *smfc, int burstsize);

int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level);



enum ipu_color_space ipu_drm_fourcc_to_colorspace(u32 drm_fourcc);

enum ipu_color_space ipu_pixelformat_to_colorspace(u32 pixelformat);