linux-kernel - Re: [PATCH v6 2/7] drm/panel: himax-hx83102: Break out as separate driver

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Message-ID: <CAD=FV=Xm99c3t_LGiHCBaJVKfurD7_SO1Wcxk73gZgftS7jEcw@mail.gmail.com>
Date: Mon, 13 May 2024 09:49:31 -0700
From: Doug Anderson <dianders@...omium.org>
To: Cong Yang <yangcong5@...qin.corp-partner.google.com>
Cc: sam@...nborg.org, neil.armstrong@...aro.org, daniel@...ll.ch, 
	linus.walleij@...aro.org, krzysztof.kozlowski+dt@...aro.org, 
	robh+dt@...nel.org, conor+dt@...nel.org, airlied@...il.com, 
	dmitry.baryshkov@...aro.org, dri-devel@...ts.freedesktop.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	xuxinxiong@...qin.corp-partner.google.com
Subject: Re: [PATCH v6 2/7] drm/panel: himax-hx83102: Break out as separate driver

Hi,

On Fri, May 10, 2024 at 7:13 PM Cong Yang
<yangcong5@...qin.corp-partner.google.com> wrote:
>
> +static int hx83102_prepare(struct drm_panel *panel)
> +{
> +       struct hx83102 *ctx = panel_to_hx83102(panel);
> +       struct mipi_dsi_device *dsi = ctx->dsi;
> +       struct device *dev = &dsi->dev;
> +       int ret;
> +
> +       gpiod_set_value(ctx->enable_gpio, 0);
> +       usleep_range(1000, 1500);
> +
> +       ret = regulator_enable(ctx->pp1800);
> +       if (ret < 0)
> +               return ret;
> +
> +       usleep_range(3000, 5000);
> +
> +       ret = regulator_enable(ctx->avdd);
> +       if (ret < 0)
> +               goto poweroff1v8;
> +       ret = regulator_enable(ctx->avee);
> +       if (ret < 0)
> +               goto poweroffavdd;
> +
> +       usleep_range(10000, 11000);
> +
> +       mipi_dsi_dcs_nop(ctx->dsi);
> +       usleep_range(1000, 2000);
> +
> +       gpiod_set_value(ctx->enable_gpio, 1);
> +       usleep_range(1000, 2000);
> +       gpiod_set_value(ctx->enable_gpio, 0);
> +       usleep_range(1000, 2000);
> +       gpiod_set_value(ctx->enable_gpio, 1);
> +       usleep_range(6000, 10000);
> +
> +       ret = ctx->desc->init(ctx);
> +       if (ret < 0)
> +               goto poweroff;
> +
> +       ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> +       if (ret) {
> +               dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
> +               return ret;
> +       }

The above should have been "goto poweroff", not "return ret".


> +       msleep(120);
> +
> +       ret = mipi_dsi_dcs_set_display_on(dsi);
> +       if (ret) {
> +               dev_err(dev, "Failed to turn on the display: %d\n", ret);
> +               return ret;
> +       }

The above should have been "goto poweroff", not "return ret".


Other than that:

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