linux-kernel - Re: [PATCH RFC 3/7] drm/panel: ilitek-ili9882t: use wrapped MIPI DCS functions

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Date: Fri, 10 May 2024 14:46:16 -0700
From: Doug Anderson <dianders@...omium.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: 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>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Jessica Zhang <quic_jesszhan@...cinc.com>, 
	Sam Ravnborg <sam@...nborg.org>, Sumit Semwal <sumit.semwal@...aro.org>, 
	Caleb Connolly <caleb.connolly@...aro.org>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	Vinod Koul <vkoul@...nel.org>, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 3/7] drm/panel: ilitek-ili9882t: use wrapped MIPI DCS functions

Hi,

On Thu, May 9, 2024 at 3:37 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> @@ -424,20 +420,14 @@ static inline struct ili9882t *to_ili9882t(struct drm_panel *panel)
>
>  static int ili9882t_enter_sleep_mode(struct ili9882t *ili)
>  {
> -       struct mipi_dsi_device *dsi = ili->dsi;
> -       int ret;
> -
> -       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
> +       struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi };
>
> -       ret = mipi_dsi_dcs_set_display_off(dsi);
> -       if (ret < 0)
> -               return ret;
> +       ili->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
>
> -       ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
> -       if (ret < 0)
> -               return ret;
> +       mipi_dsi_dcs_set_display_off_multi(&ctx);
> +       mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
>
> -       return 0;
> +       return ctx.accum_err;
>  }

nit: Same comments I had on patch #2 (boe-tv101wum-nl6) about inlining
this to the caller. Here it's even better since the caller already has
a multi_context...

In any case:

Reviewed-by: Douglas Anderson <dianders@...omium.org>