Hi, Xinlei: <xinlei.lee@xxxxxxxxxxxx> 於 2022年11月9日 週三 下午6:01寫道： > > From: Xinlei Lee <xinlei.lee@xxxxxxxxxxxx> > > Modify dpi power on/off sequence so that the first gpio operation will take effect. Applied to mediatek-drm-next [1], thanks. [1] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next Regards, Chun-Kuang. > > Fixes: 6bd4763fd532 ("drm/mediatek: set dpi pin mode to gpio low to avoid leakage current") > Signed-off-by: Xinlei Lee <xinlei.lee@xxxxxxxxxxxx> > --- > change note: > v3: Moved pull-down pin control after mtk_dpi_power_off. > > v2: Remove the empty line between Fixes: and S-o-b. > > v1: Rebase on linus/master v6.1-rc1. Change nothing. > > Because dpi power_on/off is protected by dpi->refcount, the first time > it cannot be powered on and off successfully, it will cause leakage. > --- > --- > drivers/gpu/drm/mediatek/mtk_dpi.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c > index 508a6d994e83..1f5d39a4077c 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c > @@ -461,9 +461,6 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi) > if (--dpi->refcount != 0) > return; > > - if (dpi->pinctrl && dpi->pins_gpio) > - pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); > - > mtk_dpi_disable(dpi); > clk_disable_unprepare(dpi->pixel_clk); > clk_disable_unprepare(dpi->engine_clk); > @@ -488,9 +485,6 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi) > goto err_pixel; > } > > - if (dpi->pinctrl && dpi->pins_dpi) > - pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); > - > return 0; > > err_pixel: > @@ -721,12 +715,18 @@ static void mtk_dpi_bridge_disable(struct drm_bridge *bridge) > struct mtk_dpi *dpi = bridge_to_dpi(bridge); > > mtk_dpi_power_off(dpi); > + > + if (dpi->pinctrl && dpi->pins_gpio) > + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); > } > > static void mtk_dpi_bridge_enable(struct drm_bridge *bridge) > { > struct mtk_dpi *dpi = bridge_to_dpi(bridge); > > + if (dpi->pinctrl && dpi->pins_dpi) > + pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); > + > mtk_dpi_power_on(dpi); > mtk_dpi_set_display_mode(dpi, &dpi->mode); > mtk_dpi_enable(dpi); > -- > 2.18.0 >
