linux-kernel - Re: [PATCH v3 14/17] drm/mediatek: add MT8365 SoC support

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Date: Fri, 19 Apr 2024 10:01:00 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: amergnat@...libre.com, Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Philipp Zabel <p.zabel@...gutronix.de>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
 <matthias.bgg@...il.com>, Jitao Shi <jitao.shi@...iatek.com>,
 CK Hu <ck.hu@...iatek.com>, Uwe Kleine-König
 <u.kleine-koenig@...gutronix.de>, Michael Turquette
 <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>,
 Fabien Parent <fparent@...libre.com>,
 Markus Schneider-Pargmann <msp@...libre.com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-pwm@...r.kernel.org,
 linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 14/17] drm/mediatek: add MT8365 SoC support

Il 18/04/24 16:17, amergnat@...libre.com ha scritto:
> From: Fabien Parent <fparent@...libre.com>
> 
> Add DRM support for MT8365 SoC.
> 
> Signed-off-by: Fabien Parent <fparent@...libre.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>

There are two things that I want to point out. Please check below.

The series that I've sent for adding OF Graphs [1] support to MediaTek DRM is
not going to be picked in time for v6.10, but I think neither your MT8365 support
series is, and that's why I'm telling you this.

If your work was based off my series, you would not need to add the MT8365 ddp
MAIN and EXT paths to mtk_drm_drv: you'd just add it to the bindings and then
you would declare the paths in devicetree.


[1]: 
https://lore.kernel.org/r/20240409120211.321153-1-angelogioacchino.delregno@collabora.com

There's also one more comment....

> ---
>   drivers/gpu/drm/mediatek/mtk_drm_drv.c | 30 ++++++++++++++++++++++++++++++
>   1 file changed, 30 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 74832c213092..427b601309c4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c

.snip..

> @@ -793,6 +821,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
>   	  .data = (void *)MTK_DSI },
>   	{ .compatible = "mediatek,mt8188-dsi",
>   	  .data = (void *)MTK_DSI },
> +	{ .compatible = "mediatek,mt8365-dpi",

You removed the mt8365 specific compatible from the DPI driver - why did you keep
it here?! that's not needed! :-)

Cheers,
Angelo

> +	  .data = (void *)MTK_DPI },
>   	{ }
>   };
>   
>