From: Enric Balletbo i Serra enric.balletbo@collabora.com
[ Upstream commit 605c83753d97946aab176735020a33ebfb0b4615 ]
Reset dsi0 HW to default when power on. This prevents to have different settingis between the bootloader and the kernel.
As not all Mediatek boards have the reset consumer configured in their board description, also is not needed on all of them, the reset is optional, so the change is compatible with all boards.
Cc: Jitao Shi jitao.shi@mediatek.com Suggested-by: Chun-Kuang Hu chunkuang.hu@kernel.org Signed-off-by: Enric Balletbo i Serra enric.balletbo@collabora.com Acked-by: Chun-Kuang Hu chunkuang.hu@kernel.org Reviewed-by: Matthias Brugger matthias.bgg@gmail.com Link: https://lore.kernel.org/r/20210930103105.v4.7.Idbb4727ddf00ba2fe796b630906ba... Signed-off-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/mediatek/mtk_dsi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 93b40c245f007..5d90d2eb00193 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -11,6 +11,7 @@ #include <linux/of_platform.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <linux/reset.h>
#include <video/mipi_display.h> #include <video/videomode.h> @@ -980,8 +981,10 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data) struct mtk_dsi *dsi = dev_get_drvdata(dev);
ret = mtk_dsi_encoder_init(drm, dsi); + if (ret) + return ret;
- return ret; + return device_reset_optional(dev); }
static void mtk_dsi_unbind(struct device *dev, struct device *master,