linux-kernel - Re: [PATCH v4 56/78] drm/vc4: hdmi: Store the encoder type in the variant structure

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Message-ID: <CAPY8ntCb9j7QpK8aqSryOCbhKc3D6SW-xszOvh4oOCeA5071xA@mail.gmail.com>
Date:   Tue, 28 Jul 2020 14:18:46 +0100
From:   Dave Stevenson <dave.stevenson@...pberrypi.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH v4 56/78] drm/vc4: hdmi: Store the encoder type in the
 variant structure

Hi Maxime

On Wed, 8 Jul 2020 at 18:43, Maxime Ripard <maxime@...no.tech> wrote:
>
> The vc4 CRTC will use the encoder type to control its output clock
> muxing. However, this will be different from HDMI0 to HDMI1, so let's
> store our type in the variant structure so that we can support multiple
> controllers later on.
>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>

Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>

> ---
>  drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++-
>  drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++
>  2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index a50220bfd5dd..c50241170d7e 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -1268,7 +1268,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
>
>         dev_set_drvdata(dev, vc4_hdmi);
>         encoder = &vc4_hdmi->encoder.base.base;
> -       vc4_hdmi->encoder.base.type = VC4_ENCODER_TYPE_HDMI0;
> +       vc4_hdmi->encoder.base.type = variant->encoder_type;
>         vc4_hdmi->pdev = pdev;
>         vc4_hdmi->variant = variant;
>
> @@ -1447,6 +1447,7 @@ static int vc4_hdmi_dev_remove(struct platform_device *pdev)
>  }
>
>  static const struct vc4_hdmi_variant bcm2835_variant = {
> +       .encoder_type           = VC4_ENCODER_TYPE_HDMI0,
>         .registers              = vc4_hdmi_fields,
>         .num_registers          = ARRAY_SIZE(vc4_hdmi_fields),
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
> index 0c32dc46d289..0d529db4b3ab 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.h
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
> @@ -27,6 +27,9 @@ struct vc4_hdmi;
>  struct vc4_hdmi_register;
>
>  struct vc4_hdmi_variant {
> +       /* Encoder Type for that controller */
> +       enum vc4_encoder_type encoder_type;
> +
>         /* List of the registers available on that variant */
>         const struct vc4_hdmi_register *registers;
>
> --
> git-series 0.9.1