pwm: mtk-disp: Disable shadow registers before setting backlight values

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[ Upstream commit 36dd7f530a ]

If shadow registers usage is not desired, disable that before performing
any write to CON0/1 registers in the .apply() callback, otherwise we may
lose clkdiv or period/width updates.

Fixes: cd4b45ac44 ("pwm: Add MediaTek MT2701 display PWM driver support")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Tested-by: Alexandre Mergnat <amergnat@baylibre.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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AngeloGioacchino Del Regno 2023-04-03 15:30:53 +02:00 • committed by Greg Kroah-Hartman

parent 19f5910a1e

commit 7cbcb1ca53

1 changed files with 13 additions and 11 deletions

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drivers/pwm/pwm-mtk-disp.c

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