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authorPhilipp Zabel <p.zabel@pengutronix.de>2015-01-09 11:03:13 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2017-03-15 15:42:31 +0100
commite72db3b1e50febff493bc5e3fb57da9cb8cc3d91 (patch)
tree3ad57c2c2fe02185979ab99f6584c32b06c2431d /include/video
parentba2b5277dc52cc96944d9765281bdf1e12681f66 (diff)
downloadlinux-e72db3b1e50febff493bc5e3fb57da9cb8cc3d91.tar.bz2
gpu: ipu-v3: add support for separate alpha channels
The IPUv3 can read 8-bit alpha values from a separate IDMAC channel driven by the Alpha Transparency Controller (ATC) for the graphics IDMAC channels. This allows to reduce memory bandwidth via a conditional read mechanism or to support planar YUV formats with alpha transparency. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'include/video')
-rw-r--r--include/video/imx-ipu-v3.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 899d2b00ad6d..6af74f0cf161 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -161,6 +161,28 @@ enum ipu_channel_irq {
#define IPUV3_CHANNEL_MEM_BG_ASYNC_ALPHA 52
#define IPUV3_NUM_CHANNELS 64
+static inline int ipu_channel_alpha_channel(int ch_num)
+{
+ switch (ch_num) {
+ case IPUV3_CHANNEL_G_MEM_IC_PRP_VF:
+ return IPUV3_CHANNEL_G_MEM_IC_PRP_VF_ALPHA;
+ case IPUV3_CHANNEL_G_MEM_IC_PP:
+ return IPUV3_CHANNEL_G_MEM_IC_PP_ALPHA;
+ case IPUV3_CHANNEL_MEM_FG_SYNC:
+ return IPUV3_CHANNEL_MEM_FG_SYNC_ALPHA;
+ case IPUV3_CHANNEL_MEM_FG_ASYNC:
+ return IPUV3_CHANNEL_MEM_FG_ASYNC_ALPHA;
+ case IPUV3_CHANNEL_MEM_BG_SYNC:
+ return IPUV3_CHANNEL_MEM_BG_SYNC_ALPHA;
+ case IPUV3_CHANNEL_MEM_BG_ASYNC:
+ return IPUV3_CHANNEL_MEM_BG_ASYNC_ALPHA;
+ case IPUV3_CHANNEL_MEM_VDI_PLANE1_COMB:
+ return IPUV3_CHANNEL_MEM_VDI_PLANE1_COMB_ALPHA;
+ default:
+ return -EINVAL;
+ }
+}
+
int ipu_map_irq(struct ipu_soc *ipu, int irq);
int ipu_idmac_channel_irq(struct ipu_soc *ipu, struct ipuv3_channel *channel,
enum ipu_channel_irq irq);