Re: [PATCH v7 7/7] drm/verisilicon: fix DC8200 primary plane disable clearing FB_EN

[Icenowy Zheng <zhengxingda@iscas.ac.cn>]

在 2026-09-18五的 11:01 +0800，Joey Lu写道：
> vs_dc8200_primary_plane_disable_ex() calls regmap_set_bits() on
> VSDC_FB_CONFIG_EX_FB_EN instead of regmap_clear_bits(), so disabling
> the primary plane on DC8200-family hardware actually leaves the
> framebuffer enable bit instead of clearing it.
> 
> This bug predates this series: it was carried over unchanged from
> vs_primary_plane_atomic_disable() when patch "drm/verisilicon:
> introduce per-variant hardware ops table" split the DC8200-specific
> implementation out into vs_dc8200.c.
> 
> Fixes: dbf21777caa8 ("drm: verisilicon: add a driver for Verisilicon
> display controllers")

Maybe it'd be better to fix this before adding DC variant abstraction,
for easier backporting.

Thanks,
Icenowy

> Signed-off-by: Joey Lu <a0987203069@gmail.com>
> ---
>  drivers/gpu/drm/verisilicon/vs_dc8200.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/verisilicon/vs_dc8200.c
> b/drivers/gpu/drm/verisilicon/vs_dc8200.c
> index f72da10295e1b..25b5906a1c5fc 100644
> --- a/drivers/gpu/drm/verisilicon/vs_dc8200.c
> +++ b/drivers/gpu/drm/verisilicon/vs_dc8200.c
> @@ -70,8 +70,8 @@ static void
> vs_dc8200_primary_plane_enable_ex(struct vs_dc *dc, unsigned int out
>  
>  static void vs_dc8200_primary_plane_disable_ex(struct vs_dc *dc,
> unsigned int output)
>  {
> -	regmap_set_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
> -			VSDC_FB_CONFIG_EX_FB_EN);
> +	regmap_clear_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
> +			  VSDC_FB_CONFIG_EX_FB_EN);
>  
>  	vs_dc8200_plane_commit(dc, output);
>  }