linux-kernel - Re: [PATCH 2/2] drm/panel: boe-tv101wum-nl6: Reduce lcm

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Date:   Sat, 7 Jan 2023 21:31:01 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     xinlei.lee@...iatek.com
Cc:     chunkuang.hu@...nel.org, p.zabel@...gutronix.de, airlied@...ux.ie,
        daniel@...ll.ch, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com, jitao.shi@...iatek.com,
        thierry.reding@...il.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH 2/2] drm/panel: boe-tv101wum-nl6: Reduce lcm_reset to
 send initial code time

On Fri, Jan 06, 2023 at 11:05:21AM +0800, xinlei.lee@...iatek.com wrote:
> From: Xinlei Lee <xinlei.lee@...iatek.com>
> 
> Since the panel spec stipulates that the time from lcm_reset to DSI to
> send the initial code should be greater than 6ms and less than 40ms,
> so reduce the delay before sending the initial code and avoid panel
> exceptions.

The changelog says "reduce the delay", but the patch removes the delay.
Are there other delays that make sure the "greater than 6 ms" is OK?

	Sam

> 
> Fixes: a869b9db7adf ("drm/panel: support for boe tv101wum-nl6 wuxga dsi video mode panel")
> Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>
> ---
>  drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
> index 857a2f0420d7..f0093035f1ff 100644
> --- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
> +++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
> @@ -780,7 +780,6 @@ static const struct panel_init_cmd inx_hj110iz_init_cmd[] = {
>  };
>  
>  static const struct panel_init_cmd boe_init_cmd[] = {
> -	_INIT_DELAY_CMD(24),
>  	_INIT_DCS_CMD(0xB0, 0x05),
>  	_INIT_DCS_CMD(0xB1, 0xE5),
>  	_INIT_DCS_CMD(0xB3, 0x52),
> -- 
> 2.18.0