linux-kernel - Re: [PATCH v3 2/5] drm: xlnx: zynqmp

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Message-ID: <20240205080824.GH6804@pendragon.ideasonboard.com>
Date: Mon, 5 Feb 2024 10:08:24 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Anatoliy Klymenko <anatoliy.klymenko@....com>
Cc: maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
	tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
	michal.simek@....com, dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] drm: xlnx: zynqmp_dpsub: Fix timing for live mode

Hi Anatoliy,

Thank you for the patch.

On Tue, Jan 23, 2024 at 06:53:59PM -0800, Anatoliy Klymenko wrote:
> Expect external video timing in live video input mode, program
> DPSUB acordingly.

Are there no designs where the DPSUB operates in non-live mode, but uses
a video clock from the PL, for instance to use a different clock
frequency ?

I don't think that use case is very common, so I'm fine with this patch
in order to properly support the more common use case of live input, and
leave the PL clock without live input use case for later.

> 
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> 

No need for a blank line here.

> Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@....com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/gpu/drm/xlnx/zynqmp_disp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 407bc07cec69..8a39b3accce5 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -1166,7 +1166,7 @@ void zynqmp_disp_enable(struct zynqmp_disp *disp)
>  	/* Choose clock source based on the DT clock handle. */
>  	zynqmp_disp_avbuf_set_clocks_sources(disp, disp->dpsub->vid_clk_from_ps,
>  					     disp->dpsub->aud_clk_from_ps,
> -					     true);
> +					     disp->dpsub->vid_clk_from_ps);
>  	zynqmp_disp_avbuf_enable_channels(disp);
>  	zynqmp_disp_avbuf_enable_audio(disp);
>  

-- 
Regards,

Laurent Pinchart