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authorRobert Foss <robert.foss@linaro.org>2022-12-13 16:03:04 +0100
committerRobert Foss <robert.foss@linaro.org>2022-12-15 11:18:52 +0100
commit2a9df204be0bbb896e087f00b9ee3fc559d5a608 (patch)
tree208237876a13a9d16645c7a02de5eb9c6ca57333
parent7d7bf35d630751fb27f2041c680a5ddccae9d83c (diff)
downloadlinux-2a9df204be0bbb896e087f00b9ee3fc559d5a608.tar.gz
drm/bridge: lt9611: Fix PLL being unable to lock
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 <amit.pundir@linaro.org> Reviewed-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20221213150304.4189760-1-robert.foss@linaro.org
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt9611.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index ffcdc8dba379..3ce4e495aee5 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -259,6 +259,7 @@ 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));