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| author | Steve Longerbeam <slongerbeam@gmail.com> | 2018-09-18 11:34:07 +0200 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2018-11-05 14:40:06 +0100 |
| commit | 22ec08081956084687e0824ffd0ff4d768584143 (patch) | |
| tree | 964b4e2e3c2d86f939f0556f0b84ceb4cf4b07f0 /drivers/gpu/ipu-v3 | |
| parent | fac8033fe3abbfd9b4404bf803e00a370277470a (diff) | |
| download | linux-22ec08081956084687e0824ffd0ff4d768584143.tar.bz2 | |
gpu: ipu-cpmem: add WARN_ON_ONCE() for unaligned dma buffers
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>
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 a9d2501500a1..7e65954f13c2 100644 --- a/drivers/gpu/ipu-v3/ipu-cpmem.c +++ b/drivers/gpu/ipu-v3/ipu-cpmem.c @@ -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); |