linux-dev/drivers/media/platform/mediatek/mdp, branch masterLinux kernel development work - see feature brancheshttps://git.zx2c4.com/linux-dev/atom/drivers/media/platform/mediatek/mdp?h=master2022-07-08T13:48:35Zmedia: platform: mtk-mdp: Fix mdp_ipi_comm structure alignment2022-07-08T13:48:35ZAngeloGioacchino Del Regnoangelogioacchino.delregno@collabora.com2022-06-23T13:55:46Zurn:sha1:ab14c99c035da7156a3b66fa171171295bc4b89a
The mdp_ipi_comm structure defines a command that is either
PROCESS (start processing) or DEINIT (destroy instance); we
are using this one to send PROCESS or DEINIT commands from Linux
to an MDP instance through a VPU write but, while the first wants
us to stay 4-bytes aligned, the VPU instead requires an 8-bytes
data alignment.
Keeping in mind that these commands are executed immediately
after sending them (hence not chained with others before the
VPU/MDP "actually" start executing), it is fine to simply add
a padding of 4 bytes to this structure: this keeps the same
performance as before, as we're still stack-allocating it,
while avoiding hackery inside of mtk-vpu to ensure alignment
bringing a definitely bigger performance impact.
Fixes: c8eb2d7e8202 ("[media] media: Add Mediatek MDP Driver")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Houlong Wei <houlong.wei@mediatek.com>
Reviewed-by: Irui Wang <irui.wang@mediatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
media: platform: rename mediatek/mtk-jpeg/ to mediatek/jpeg/2022-03-18T04:58:35ZMauro Carvalho Chehabmchehab@kernel.org2022-03-14T15:31:09Zurn:sha1:2023a99811110aebba9eee4aa09ef7bd21a8a249
As the end goal is to have platform drivers split by vendor,
rename mediatek/mtk-jpeg/ to mediatek/jpeg/.
Requested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>