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authorHugo Villeneuve <hvilleneuve@dimonoff.com>2024-09-27 16:53:05 +0300
committerNeil Armstrong <neil.armstrong@linaro.org>2025-02-13 19:46:51 +0300
commita8972d5a49b408248294b5ecbdd0a085e4726349 (patch)
treea56cb5e140b8fbdfa2277ce9b9b7245f4031ab57 /tools/perf/scripts/python/syscall-counts.py
parente00a2e5d485faf53c7a24b9d1b575a642227947f (diff)
downloadlinux-a8972d5a49b408248294b5ecbdd0a085e4726349.tar.xz
drm: panel: jd9365da-h3: fix reset signal polarity
In jadard_prepare() a reset pulse is generated with the following statements (delays ommited for clarity): gpiod_set_value(jadard->reset, 1); --> Deassert reset gpiod_set_value(jadard->reset, 0); --> Assert reset for 10ms gpiod_set_value(jadard->reset, 1); --> Deassert reset However, specifying second argument of "0" to gpiod_set_value() means to deassert the GPIO, and "1" means to assert it. If the reset signal is defined as GPIO_ACTIVE_LOW in the DTS, the above statements will incorrectly generate the reset pulse (inverted) and leave it asserted (LOW) at the end of jadard_prepare(). Fix reset behavior by inverting gpiod_set_value() second argument in jadard_prepare(). Also modify second argument to devm_gpiod_get() in jadard_dsi_probe() to assert the reset when probing. Do not modify it in jadard_unprepare() as it is already properly asserted with "1", which seems to be the intended behavior. Fixes: 6b818c533dd8 ("drm: panel: Add Jadard JD9365DA-H3 DSI panel") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20240927135306.857617-1-hugo@hugovil.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240927135306.857617-1-hugo@hugovil.com
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