drm/bridge: adv7533: Fix adv7533_mode_valid for adv7533 and adv7535

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[ Upstream commit ee0285e134 ]

When dynamically switching lanes was removed, the intent of the code
was to check to make sure that higher speed items used 4 lanes, but
it had the unintended consequence of removing the slower speeds for
4-lane users.

This attempts to remedy this by doing a check to see that the
max frequency doesn't exceed the chip limit, and a second
check to make sure that the max bit-rate doesn't exceed the
number of lanes * max bit rate / lane.

Fixes: 9a0cdcd664 ("drm/bridge: adv7533: remove dynamic lane switching from adv7533 bridge")
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230319125524.58803-1-aford173@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Adam Ford 2023-03-19 07:55:24 -05:00 • committed by Greg Kroah-Hartman

parent 1f141fe515

commit 052d22acd7

1 changed files with 11 additions and 14 deletions

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drivers/gpu/drm/bridge/adv7511/adv7533.c

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