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Message-ID: <CAPY8ntDT1X-2y7P-FAdw1CsT3SQuxCbfuhG6kPGR=v2KCnoQ8g@mail.gmail.com>
Date: Thu, 14 Dec 2023 14:40:52 +0000
From: Dave Stevenson <dave.stevenson@...pberrypi.com>
To: Maxime Ripard <mripard@...nel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Emma Anholt <emma@...olt.net>,
Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, Hans Verkuil <hverkuil@...all.nl>,
linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v5 07/44] drm/connector: hdmi: Create an HDMI sub-state
On Thu, 7 Dec 2023 at 15:50, Maxime Ripard <mripard@...nel.org> wrote:
>
> The next features we will need to share across drivers will need to
> store some parameters for drivers to use, such as the selected output
> format.
>
> Let's create a new connector sub-state dedicated to HDMI controllers,
> that will eventually store everything we need.
>
> Signed-off-by: Maxime Ripard <mripard@...nel.org>
Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
> ---
> drivers/gpu/drm/drm_atomic_state_helper.c | 35 +++++++++++++++++++++++++++++++
> include/drm/drm_atomic_state_helper.h | 4 ++++
> include/drm/drm_connector.h | 7 +++++++
> 3 files changed, 46 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> index 54975de44a0e..e69c0cc1c6da 100644
> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> @@ -570,6 +570,22 @@ void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector)
> }
> EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);
>
> +/**
> + * __drm_atomic_helper_connector_hdmi_reset() - Initializes all HDMI @drm_connector_state resources
> + * @connector: DRM connector
> + * @new_state: connector state to reset
> + *
> + * Initializes all HDMI resources from a @drm_connector_state without
> + * actually allocating it. This is useful for HDMI drivers, in
> + * combination with __drm_atomic_helper_connector_reset() or
> + * drm_atomic_helper_connector_reset().
> + */
> +void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
> + struct drm_connector_state *new_state)
> +{
> +}
> +EXPORT_SYMBOL(__drm_atomic_helper_connector_hdmi_reset);
> +
> /**
> * drm_atomic_helper_connector_tv_check - Validate an analog TV connector state
> * @connector: DRM Connector
> @@ -619,6 +635,25 @@ int drm_atomic_helper_connector_tv_check(struct drm_connector *connector,
> }
> EXPORT_SYMBOL(drm_atomic_helper_connector_tv_check);
>
> +/**
> + * drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state
> + * @connector: DRM Connector
> + * @state: the DRM State object
> + *
> + * Provides a default connector state check handler for HDMI connectors.
> + * Checks that a desired connector update is valid, and updates various
> + * fields of derived state.
> + *
> + * RETURNS:
> + * Zero on success, or an errno code otherwise.
> + */
> +int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
> + struct drm_atomic_state *state)
> +{
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_check);
> +
> /**
> * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
> * @connector: connector object
> diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
> index b9740edb2658..d59d2b3aef9a 100644
> --- a/include/drm/drm_atomic_state_helper.h
> +++ b/include/drm/drm_atomic_state_helper.h
> @@ -71,7 +71,11 @@ void __drm_atomic_helper_connector_state_reset(struct drm_connector_state *conn_
> void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
> struct drm_connector_state *conn_state);
> void drm_atomic_helper_connector_reset(struct drm_connector *connector);
> +void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
> + struct drm_connector_state *new_state);
> void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector);
> +int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
> + struct drm_atomic_state *state);
> int drm_atomic_helper_connector_tv_check(struct drm_connector *connector,
> struct drm_atomic_state *state);
> void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector);
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 4491c4c2fb6e..000a2a156619 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1031,6 +1031,13 @@ struct drm_connector_state {
> * DRM blob property for HDR output metadata
> */
> struct drm_property_blob *hdr_output_metadata;
> +
> + /**
> + * @hdmi: HDMI-related variable and properties. Filled by
> + * @drm_atomic_helper_connector_hdmi_check().
> + */
> + struct {
> + } hdmi;
> };
>
> /**
>
> --
> 2.43.0
>
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