diff options
| author | Steve Longerbeam | 2014-06-25 18:05:35 -0700 |
|---|---|---|
| committer | Philipp Zabel | 2014-09-02 14:55:45 +0200 |
| commit | a2be35e3320b27c84488729e9fb56a62e74d65fa (patch) | |
| tree | a2d770f3fe7f5e5165c753820262df5a95940192 | |
| parent | 7fafa8f06f9bdf32b806b4612bfe387de8e34125 (diff) | |
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: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-smfc.c | 20 | ||||
| -rw-r--r-- | include/video/imx-ipu-v3.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-smfc.c b/drivers/gpu/ipu-v3/ipu-smfc.c index a6429ca913c1..6ca9b43ce25a 100644 --- a/drivers/gpu/ipu-v3/ipu-smfc.c +++ b/drivers/gpu/ipu-v3/ipu-smfc.c @@ -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; diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h index a695ee83e4e1..49e5954ac033 100644 --- a/include/video/imx-ipu-v3.h +++ b/include/video/imx-ipu-v3.h @@ -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); |