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gpu: ipu-cpmem: add WARN_ON_ONCE() for unaligned dma buffers

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Add a WARN_ON_ONCE() if either the Y/packed buffer, or the U/V offsets,
are not aligned on 8-byte boundaries. This will catch alignment
bugs in DRM, V4L2.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2018-09-18 11:34:07 +02:00 committed by Philipp Zabel
parent fac8033fe3
commit 22ec080819
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/ipu-v3/ipu-cpmem.c
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@ -259,6 +259,8 @@ EXPORT_SYMBOL_GPL(ipu_cpmem_set_high_priority);
void ipu_cpmem_set_buffer(struct ipuv3_channel *ch, int bufnum, dma_addr_t buf)
{
WARN_ON_ONCE(buf & 0x7);
if (bufnum)
ipu_ch_param_write_field(ch, IPU_FIELD_EBA1, buf >> 3);
else
@ -268,6 +270,8 @@ EXPORT_SYMBOL_GPL(ipu_cpmem_set_buffer);
void ipu_cpmem_set_uv_offset(struct ipuv3_channel *ch, u32 u_off, u32 v_off)
{
WARN_ON_ONCE((u_off & 0x7) || (v_off & 0x7));
ipu_ch_param_write_field(ch, IPU_FIELD_UBO, u_off / 8);
ipu_ch_param_write_field(ch, IPU_FIELD_VBO, v_off / 8);
}
@ -435,6 +439,8 @@ void ipu_cpmem_set_yuv_planar_full(struct ipuv3_channel *ch,
unsigned int uv_stride,
unsigned int u_offset, unsigned int v_offset)
{
WARN_ON_ONCE((u_offset & 0x7) || (v_offset & 0x7));
ipu_ch_param_write_field(ch, IPU_FIELD_SLUV, uv_stride - 1);
ipu_ch_param_write_field(ch, IPU_FIELD_UBO, u_offset / 8);
ipu_ch_param_write_field(ch, IPU_FIELD_VBO, v_offset / 8);