media: hantro: Avoid global variable for jpeg quantization tables

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On a system with multiple encoders present, it's possible for two
encoders to write to the global luma and chroma quantization tables at
the same time if they both submit a JPEG frame to be encoded. Avoid
this race by moving the tables into the `jpeg_ctx` structure which is
stored on the stack.

Signed-off-by: James Cowgill <james.cowgill@blaize.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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James Cowgill 2021-11-11 23:01:08 +01:00 • committed by Mauro Carvalho Chehab

parent 615c6f28b9

commit 41479adb5e

4 changed files with 16 additions and 29 deletions

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5

drivers/staging/media/hantro/hantro_h1_jpeg_enc.c

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31

drivers/staging/media/hantro/hantro_jpeg.c

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4

drivers/staging/media/hantro/hantro_jpeg.h

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5

drivers/staging/media/hantro/rockchip_vpu2_hw_jpeg_enc.c

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