This is a note to let you know that I've just added the patch titled
drm: adv7511: Fix low refresh rate register for ADV7533/5
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-adv7511-fix-low-refresh-rate-register-for-adv753.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 88052ac91f7f0e76a25140be0f02551debe3d911
Author: Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>
Date: Wed Jul 19 09:01:43 2023 +0300
drm: adv7511: Fix low refresh rate register for ADV7533/5
[ Upstream commit d281eeaa4de2636ff0c8e6ae387bb07b50e5fcbb ]
For ADV7533 and ADV7535 low refresh rate is selected using
bits [3:2] of 0x4a main register.
So depending on ADV model write 0xfb or 0x4a register.
Fixes: 2437e7cd88e8 ("drm/bridge: adv7533: Initial support for ADV7533")
Reviewed-by: Robert Foss <rfoss@xxxxxxxxxx>
Reviewed-by: Nuno Sa <nuno.sa@xxxxxxxxxx>
Signed-off-by: Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>
Signed-off-by: Alexandru Ardelean <alex@xxxxxxxxxxx>
Reviewed-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Signed-off-by: Robert Foss <rfoss@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230719060143.63649-1-alex@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index 62ef603627b77..2cdfbdcbf02d6 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -756,8 +756,13 @@ static void adv7511_mode_set(struct adv7511 *adv7511,
else
low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
- regmap_update_bits(adv7511->regmap, 0xfb,
- 0x6, low_refresh_rate << 1);
+ if (adv7511->type == ADV7511)
+ regmap_update_bits(adv7511->regmap, 0xfb,
+ 0x6, low_refresh_rate << 1);
+ else
+ regmap_update_bits(adv7511->regmap, 0x4a,
+ 0xc, low_refresh_rate << 2);
+
regmap_update_bits(adv7511->regmap, 0x17,
0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
