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drm: panel: jd9365da: fix reset signal polarity in unprepare

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commit a8972d5a49 ("drm: panel: jd9365da-h3: fix reset signal polarity")
fixed reset signal polarity in jadard_dsi_probe() and jadard_prepare().

It was not done in jadard_unprepare() because of an incorrect assumption
about reset line handling in power off mode. After looking into the
datasheet, it now appears that before disabling regulators, the reset line
is deasserted first, and if reset_before_power_off_vcioo is true, then the
reset line is asserted.

Fix reset polarity by inverting gpiod_set_value() second argument in
in jadard_unprepare().

Fixes: 6b818c533d ("drm: panel: Add Jadard JD9365DA-H3 DSI panel")
Fixes: 2b976ad760 ("drm/panel: jd9365da: Support for kd101ne3-40ti MIPI-DSI panel")
Fixes: a8972d5a49 ("drm: panel: jd9365da-h3: fix reset signal polarity")
Cc: stable@vger.kernel.org
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250417195507.778731-1-hugo@hugovil.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250417195507.778731-1-hugo@hugovil.com
This commit is contained in:
Hugo Villeneuve 2025-04-17 15:55:06 -04:00 committed by Neil Armstrong
parent 1017560164
commit 095c8e61f4
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
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@ -129,11 +129,11 @@ static int jadard_unprepare(struct drm_panel *panel)
{
struct jadard *jadard = panel_to_jadard(panel);
gpiod_set_value(jadard->reset, 1);
gpiod_set_value(jadard->reset, 0);
msleep(120);
if (jadard->desc->reset_before_power_off_vcioo) {
gpiod_set_value(jadard->reset, 0);
gpiod_set_value(jadard->reset, 1);
usleep_range(1000, 2000);
}