[PATCH] drm: adv7511: Fix low refresh rate register for ADV7533/5

From: Alexandru Ardelean
Date: Tue May 16 2023 - 12:44:26 EST


From: Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>

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.

Signed-off-by: Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>
Signed-off-by: Alexandru Ardelean <alex@xxxxxxxxxxx>
---
drivers/gpu/drm/i2c/adv7511.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index 61aa824d45d2..e016105a8fbe 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -729,8 +729,13 @@ static void adv7511_encoder_mode_set(struct drm_encoder *encoder,
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));

--
2.40.1