drm/vc4: hdmi: Retrieve the vc4_hdmi at unbind using our device

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The unbind function needs to retrieve a vc4_hdmi structure pointer through
the struct device that we're given since we want to support multiple HDMI
controllers.

However, our optional ASoC support doesn't make that trivial since it will
overwrite the device drvdata if we use it, but obviously won't if we don't
use it.

Let's make sure the fields are at the proper offset to be able to cast
between the snd_soc_card structure and the vc4_hdmi structure
transparently so we can support both cases.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/717082cba06b5c06280f26c56c08aee512365ed3.1599120059.git-series.maxime@cerno.tech

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This commit is contained in:

Maxime Ripard 2020-09-03 10:01:19 +02:00

parent 66bf1c30e0

commit 47c167b757

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2 changed files with 25 additions and 3 deletions

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24

drivers/gpu/drm/vc4/vc4_hdmi.c

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4

drivers/gpu/drm/vc4/vc4_hdmi.h

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