drm/ast: Handle failed I2C initialization gracefully

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I2C initialization is allowed to fail. In this case, create a connector
without DDC adapter. The current code would dereference a NULL pointer.

Reading the modes from the connector is supposed to work without I2C
adapter. Add the respective test.

v2:
	* init edid to NULL to avoid uninitialized read (Dan)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206091125.29501-2-tzimmermann@suse.de

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This commit is contained in:

Thomas Zimmermann 2021-12-06 10:11:23 +01:00

parent d619f38c01

commit 55dc449a7c

1 changed files with 10 additions and 7 deletions

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17

drivers/gpu/drm/ast/ast_mode.c

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