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Commit e1e9733c authored by Philipp Zabel's avatar Philipp Zabel
Browse files

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: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 16e9ab82

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

+6 −0
Original line number Diff line number Diff line
@@ -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);

include/video/imx-ipu-v3.h

+1 −0
Original line number Diff line number Diff line
@@ -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);