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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2014-09-17 15:44:54 +0200 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2017-06-08 08:57:18 +0200 |
| commit | e1e9733cd37908a9ba61e29154561f0c81420e06 (patch) | |
| tree | e6d44c45346488469ae32b184827348ecc95c6a6 | |
| parent | gpu: ipu-v3: prg: remove counter load enable (diff) | |
| download | linux-e1e9733cd37908a9ba61e29154561f0c81420e06.tar.xz linux-e1e9733cd37908a9ba61e29154561f0c81420e06.zip | |
gpu: ipu-v3: Add support for double read/write reduction
Allow to skip writing odd chroma rows by setting the RDRW bit for
4:2:0 chroma subsampled formats for any IDMAC write channel. This
also allows to skip reading odd rows for the VDIC read channel.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-cpmem.c | 6 | ||||
| -rw-r--r-- | include/video/imx-ipu-v3.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-cpmem.c b/drivers/gpu/ipu-v3/ipu-cpmem.c index 114160dfc3ad..1cb82f445f91 100644 --- a/drivers/gpu/ipu-v3/ipu-cpmem.c +++ b/drivers/gpu/ipu-v3/ipu-cpmem.c @@ -224,6 +224,12 @@ void ipu_cpmem_set_resolution(struct ipuv3_channel *ch, int xres, int yres) } EXPORT_SYMBOL_GPL(ipu_cpmem_set_resolution); +void ipu_cpmem_skip_odd_chroma_rows(struct ipuv3_channel *ch) +{ + ipu_ch_param_write_field(ch, IPU_FIELD_RDRW, 1); +} +EXPORT_SYMBOL_GPL(ipu_cpmem_skip_odd_chroma_rows); + void ipu_cpmem_set_stride(struct ipuv3_channel *ch, int stride) { ipu_ch_param_write_field(ch, IPU_FIELD_SLY, stride - 1); diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h index 8cb07680fb41..ce4c07688b13 100644 --- a/include/video/imx-ipu-v3.h +++ b/include/video/imx-ipu-v3.h @@ -250,6 +250,7 @@ struct ipu_image { void ipu_cpmem_zero(struct ipuv3_channel *ch); void ipu_cpmem_set_resolution(struct ipuv3_channel *ch, int xres, int yres); +void ipu_cpmem_skip_odd_chroma_rows(struct ipuv3_channel *ch); void ipu_cpmem_set_stride(struct ipuv3_channel *ch, int stride); void ipu_cpmem_set_high_priority(struct ipuv3_channel *ch); void ipu_cpmem_set_buffer(struct ipuv3_channel *ch, int bufnum, dma_addr_t buf); |