linux-kernel - Re: [PATCH v2 1/2] drm/panel-simple: Fix inverted V/H SYNC for Frida FRD350H54004 panel

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Date:   Thu, 16 Jul 2020 19:50:32 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Thierry Reding <thierry.reding@...il.com>, od@...c.me,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] drm/panel-simple: Fix inverted V/H SYNC for Frida
 FRD350H54004 panel

On Thu, Jul 16, 2020 at 02:56:46PM +0200, Paul Cercueil wrote:
> The FRD350H54004 panel was marked as having active-high VSYNC and HSYNC
> signals, which sorts-of worked, but resulted in the picture fading out
> under certain circumstances.
> 
> Fix this issue by marking VSYNC and HSYNC signals active-low.
> 
> v2: Rebase on drm-misc-next
> 
> Fixes: 7b6bd8433609 ("drm/panel: simple: Add support for the Frida FRD350H54004 panel")
> Cc: stable@...r.kernel.org # v5.5
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>

Thanks for the re-submit. Applied both patches to drm-misc-next.

	Sam

> ---
>  drivers/gpu/drm/panel/panel-simple.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index f42249b72548..8b0bab9dd075 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1763,7 +1763,7 @@ static const struct drm_display_mode frida_frd350h54004_mode = {
>  	.vsync_start = 240 + 2,
>  	.vsync_end = 240 + 2 + 6,
>  	.vtotal = 240 + 2 + 6 + 2,
> -	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
> +	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
>  };
>  
>  static const struct panel_desc frida_frd350h54004 = {
> -- 
> 2.27.0