linux-kernel - Re: [linux-sunxi] [PATCH 10/15] drm/sun4i: Add support for R40 TV TCONs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAGRGNgXbKGhnern4=_W9W5dKM54H5B1dnAD7up-23rUAMWWCSw@mail.gmail.com>
Date:   Sun, 20 May 2018 12:09:52 +1000
From:   Julian Calaby <julian.calaby@...il.com>
To:     jernej.skrabec@...l.net
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>,
        "Mailing List, Arm" <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH 10/15] drm/sun4i: Add support for R40 TV TCONs

Hi Jernej,

On Sun, May 20, 2018 at 11:57 AM, Julian Calaby <julian.calaby@...il.com> wrote:
> Hi Jernej,
>
> On Sun, May 20, 2018 at 4:31 AM, Jernej Skrabec <jernej.skrabec@...l.net> wrote:
>> R40 display pipeline has a lot of possible configurations. HDMI can be
>> connected to 2 different TCONs (out of 4) and mixers can be connected to
>> any TCON. All this must be configured in TCON TOP.
>>
>> Along with definition of TCON capabilities also add mux callback, which
>> can configure this complex pipeline.
>>
>> For now, only TCON TV is supported.
>>
>> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
>> ---
>>  drivers/gpu/drm/sun4i/sun4i_tcon.c | 39 ++++++++++++++++++++++++++++++
>>  1 file changed, 39 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
>> index e0c562ce1c22..81b9551e4f78 100644
>> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
>> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
>> @@ -1274,6 +1274,31 @@ static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon,
>>         return 0;
>>  }
>>
>> +static int sun8i_r40_tcon_tv_set_mux(struct sun4i_tcon *tcon,
>> +                                    const struct drm_encoder *encoder,
>> +                                    int index)
>> +{
>> +       if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
>> +               sun8i_tcon_top_set_hdmi_src(tcon->tcon_top, index);
>> +
>> +       sun8i_tcon_top_de_config(tcon->tcon_top, tcon->id,
>> +                                tcon_type_tv, index);
>> +
>> +       return 0;
>> +}
>> +
>> +static int sun8i_r40_tcon_tv_set_mux_0(struct sun4i_tcon *tcon,
>> +                                      const struct drm_encoder *encoder)
>> +{
>> +       return sun8i_r40_tcon_tv_set_mux(tcon, encoder, 0);
>> +}
>> +
>> +static int sun8i_r40_tcon_tv_set_mux_1(struct sun4i_tcon *tcon,
>> +                                      const struct drm_encoder *encoder)
>> +{
>> +       return sun8i_r40_tcon_tv_set_mux(tcon, encoder, 1);
>> +}
>
> Are TCON-TOPs going to be a common thing in new SoCs from Allwinner?
> If so, maybe we should add an index to the TCON quirks and have a
> common TCON-TOP set_mux function.

Actually, that only moves it up a level. Should it be a devicetree property?

Thanks,

-- 
Julian Calaby

Email: julian.calaby@...il.com
Profile: http://www.google.com/profiles/julian.calaby/