| Message ID | 20221213150304.4189760-1-robert.foss@linaro.org (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v1] drm/bridge: lt9611: Fix PLL being unable to lock | expand |
On Tue, 13 Dec 2022 at 20:33, Robert Foss <robert.foss@linaro.org> wrote: > > 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. > Cc: <stable@vger.kernel.org> [v5.10+] Reviewed-by: Amit Pundir <amit.pundir@linaro.org> > Suggested-by: Amit Pundir <amit.pundir@linaro.org> > Signed-off-by: Robert Foss <robert.foss@linaro.org> > --- > 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 ffcdc8dba3798..3ce4e495aee50 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)); > -- > 2.34.1 >
On Tue, 13 Dec 2022 16:03:04 +0100, Robert Foss wrote: > 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. > > [...] Applied, thanks! Repo: https://cgit.freedesktop.org/drm/drm-misc/ [1/1] drm/bridge: lt9611: Fix PLL being unable to lock commit: 2a9df204be0bbb896e087f00b9ee3fc559d5a608 rob
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index ffcdc8dba3798..3ce4e495aee50 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));
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> Signed-off-by: Robert Foss <robert.foss@linaro.org> --- drivers/gpu/drm/bridge/lontium-lt9611.c | 1 + 1 file changed, 1 insertion(+)