From 0a3e21976517b82f4fb4f32ecb4a9e6ac8d5d411 Mon Sep 17 00:00:00 2001 From: Robert Foss Date: Tue, 13 Dec 2022 16:03:04 +0100 Subject: [PATCH] drm/bridge: lt9611: Fix PLL being unable to lock commit 2a9df204be0bbb896e087f00b9ee3fc559d5a608 upstream. This fixes PLL being unable to lock, and is derived from an equivalent downstream commit. Available LT9611 documentation does not list this register, neither does LT9611UXC (which is a different chip). This commit has been confirmed to fix HDMI output on DragonBoard 845c. Suggested-by: Amit Pundir Reviewed-by: Amit Pundir Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20221213150304.4189760-1-robert.foss@linaro.org Signed-off-by: Amit Pundir Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/bridge/lontium-lt9611.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index 3b77238ca4af..ae8c6d9d4095 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -258,6 +258,7 @@ static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode { 0x8126, 0x55 }, { 0x8127, 0x66 }, { 0x8128, 0x88 }, + { 0x812a, 0x20 }, }; regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); -- 2.49.0