linux-kernel - Re: [v4 4/4] drm/panel-simple: Add Samsung ATNA33XC20

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Date:   Tue, 25 May 2021 10:19:15 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Rajeev Nandan <rajeevny@...eaurora.org>
Cc:     y@...lcomm.com, dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Rob Clark <robdclark@...il.com>, Lyude Paul <lyude@...hat.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Rob Herring <robh@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        "Kristian H. Kristensen" <hoegsberg@...omium.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Sean Paul <seanpaul@...omium.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>, mkrishn@...eaurora.org
Subject: Re: [v4 4/4] drm/panel-simple: Add Samsung ATNA33XC20

Hi,

On Tue, May 25, 2021 at 12:31 AM Rajeev Nandan <rajeevny@...eaurora.org> wrote:
>
> Add Samsung 13.3" FHD eDP AMOLED panel.
>
> Signed-off-by: Rajeev Nandan <rajeevny@...eaurora.org>
> ---
>
> Changes in v4:
> - New
>
>  drivers/gpu/drm/panel/panel-simple.c | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index caed71b..21af794 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -3644,6 +3644,37 @@ static const struct panel_desc rocktech_rk101ii01d_ct = {
>         .connector_type = DRM_MODE_CONNECTOR_LVDS,
>  };
>
> +static const struct drm_display_mode samsung_atna33xc20_mode = {
> +       .clock = 138770,
> +       .hdisplay = 1920,
> +       .hsync_start = 1920 + 48,
> +       .hsync_end = 1920 + 48 + 32,
> +       .htotal = 1920 + 48 + 32 + 80,
> +       .vdisplay = 1080,
> +       .vsync_start = 1080 + 8,
> +       .vsync_end = 1080 + 8 + 8,
> +       .vtotal = 1080 + 8 + 8 + 16,
> +       .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
> +};
> +
> +static const struct panel_desc samsung_atna33xc20 = {
> +       .modes = &samsung_atna33xc20_mode,
> +       .num_modes = 1,
> +       .bpc = 10,
> +       .size = {
> +               .width = 294,
> +               .height = 165,
> +       },
> +       .delay = {
> +               .disable_to_power_off = 150,
> +               .power_to_enable = 150,
> +               .hpd_absent_delay = 200,
> +               .unprepare = 500,
> +       },
> +       .connector_type = DRM_MODE_CONNECTOR_eDP,
> +       .uses_dpcd_backlight = true,

>From my feedback on the previous patch in this series, I believe the
"uses_dpcd_backlight" property should be removed and this should be
auto-detected. Other than that this patch looks fine to me. Feel free
to add my Reviewed-by tag next spin when that property is removed.