linux-kernel - Re: [PATCH 2/2] drm/panel: ili9322: Convert to use maple tree register cache

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Message-ID: <28ac4edd-f600-456a-b6ea-ebf7d527015e@linaro.org>
Date:   Mon, 2 Oct 2023 08:52:52 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Mark Brown <broonie@...nel.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] drm/panel: ili9322: Convert to use maple tree
 register cache

On 01/10/2023 12:24, Mark Brown wrote:
> The maple tree register cache is based on a much more modern data structure
> than the rbtree cache and makes optimisation choices which are probably
> more appropriate for modern systems than those made by the rbtree cache.
> 
> Signed-off-by: Mark Brown <broonie@...nel.org>
> ---
>   drivers/gpu/drm/panel/panel-ilitek-ili9322.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
> index 15b81e5228b5..4a6dcfd781e8 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
> @@ -337,7 +337,7 @@ static const struct regmap_config ili9322_regmap_config = {
>   	.reg_bits = 8,
>   	.val_bits = 8,
>   	.max_register = 0x44,
> -	.cache_type = REGCACHE_RBTREE,
> +	.cache_type = REGCACHE_MAPLE,
>   	.writeable_reg = ili9322_writeable_reg,
>   };
>   
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>