media: stm32: dcmi: only create dma descriptor once at buf_prepare

Browse source

Perform the dmaengine prep_slave_sg call within buf_prepare and
mark the descriptor as reusable in order to avoid having to redo
this at every start of the dma.
This also allow to remove the mutex used by the driver to protect
dma descriptors related piece of codes.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

...

This commit is contained in:

Alain Volmat 2026-01-06 12:34:31 +01:00 • committed by Mauro Carvalho Chehab

parent bc901885fa

commit 9b6f6208f4

1 changed files with 45 additions and 33 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

78

drivers/media/platform/st/stm32/stm32-dcmi.c

View file