linux-kernel - Re: [PATCH v2 3/4] drm/dsi: Implement dcs set/get display brightness

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Message-ID: <CACvgo52ijPMDT=jNpyGTtzzEH4DksNdMC4mzENZZ1NhG0f=Spg@mail.gmail.com>
Date:	Thu, 14 Jul 2016 22:20:48 +0100
From:	Emil Velikov <emil.l.velikov@...il.com>
To:	Vinay Simha BN <simhavcs@...il.com>
Cc:	open list <linux-kernel@...r.kernel.org>,
	"open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
	Archit Taneja <archit.taneja@...il.com>
Subject: Re: [PATCH v2 3/4] drm/dsi: Implement dcs set/get display brightness

On 13 July 2016 at 17:44, Vinay Simha BN <simhavcs@...il.com> wrote:

> +int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
> +                                       u16 *brightness)
> +{
> +       ssize_t err;
> +
> +       err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
> +                               brightness, sizeof(*brightness));
> +       if (err < 0) {
> +               if (err == 0)
Something looks fishy here. This can never be true, can it ?

 -Emil