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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 /drivers/gpu/ipu-v3 | |
| parent | 16e9ab820ad43108513ec32bb18fb226df4cc7fc (diff) | |
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>
Diffstat (limited to 'drivers/gpu/ipu-v3')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-cpmem.c | 6 |
1 files changed, 6 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); |