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Message-ID: <CAA8EJprSAzov9p92gscTxaKv+5Lc3rzm1NguqEeCKCArrEeV0A@mail.gmail.com>
Date: Thu, 7 Mar 2024 23:34:37 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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>,
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>, Hans Verkuil <hverkuil@...all.nl>,
Sebastian Wick <sebastian.wick@...hat.com>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v8 20/27] drm/connector: hdmi: Add Infoframes generation
On Thu, 7 Mar 2024 at 15:39, Maxime Ripard <mripard@...nel.org> wrote:
>
> Infoframes in KMS is usually handled by a bunch of low-level helpers
> that require quite some boilerplate for drivers. This leads to
> discrepancies with how drivers generate them, and which are actually
> sent.
>
> Now that we have everything needed to generate them in the HDMI
> connector state, we can generate them in our common logic so that
> drivers can simply reuse what we precomputed.
>
> Signed-off-by: Maxime Ripard <mripard@...nel.org>
> ---
> drivers/gpu/drm/Kconfig | 1 +
> drivers/gpu/drm/drm_atomic_state_helper.c | 327 +++++++++++++++++++++
> drivers/gpu/drm/drm_connector.c | 14 +
> .../gpu/drm/tests/drm_atomic_state_helper_test.c | 1 +
> drivers/gpu/drm/tests/drm_connector_test.c | 12 +
> include/drm/drm_atomic_state_helper.h | 8 +
> include/drm/drm_connector.h | 133 +++++++++
> 7 files changed, 496 insertions(+)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 872edb47bb53..ad9c467e20ce 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -97,10 +97,11 @@ config DRM_KUNIT_TEST
> If in doubt, say "N".
>
> config DRM_KMS_HELPER
> tristate
> depends on DRM
> + select DRM_DISPLAY_HDMI_HELPER
> help
> CRTC helpers for KMS drivers.
>
> config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
> bool "Enable refcount backtrace history in the DP MST helpers"
> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> index e66272c0d006..46d9fd2ea8fa 100644
> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> @@ -36,10 +36,12 @@
> #include <drm/drm_plane.h>
> #include <drm/drm_print.h>
> #include <drm/drm_vblank.h>
> #include <drm/drm_writeback.h>
>
> +#include <drm/display/drm_hdmi_helper.h>
> +
> #include <linux/slab.h>
> #include <linux/dma-fence.h>
>
> /**
> * DOC: atomic state reset and initialization
> @@ -912,10 +914,146 @@ hdmi_compute_config(const struct drm_connector *connector,
> }
>
> return -EINVAL;
> }
>
> +static int hdmi_generate_avi_infoframe(const struct drm_connector *connector,
> + struct drm_connector_state *state)
> +{
> + const struct drm_display_mode *mode =
> + connector_state_get_mode(state);
> + struct drm_connector_hdmi_infoframe *infoframe =
> + &state->hdmi.infoframes.avi;
> + struct hdmi_avi_infoframe *frame =
> + &infoframe->data.avi;
> + bool is_full_range = state->hdmi.is_full_range;
> + enum hdmi_quantization_range rgb_quant_range =
> + is_full_range ? HDMI_QUANTIZATION_RANGE_FULL : HDMI_QUANTIZATION_RANGE_LIMITED;
> + int ret;
> +
> + ret = drm_hdmi_avi_infoframe_from_display_mode(frame, connector, mode);
> + if (ret)
> + return ret;
> +
> + frame->colorspace = state->hdmi.output_format;
> +
> + drm_hdmi_avi_infoframe_quant_range(frame, connector, mode, rgb_quant_range);
> + drm_hdmi_avi_infoframe_colorimetry(frame, state);
> + drm_hdmi_avi_infoframe_bars(frame, state);
> +
> + infoframe->set = true;
> +
> + return 0;
> +}
> +
> +static int hdmi_generate_spd_infoframe(const struct drm_connector *connector,
> + struct drm_connector_state *state)
> +{
> + struct drm_connector_hdmi_infoframe *infoframe =
> + &state->hdmi.infoframes.spd;
> + struct hdmi_spd_infoframe *frame =
> + &infoframe->data.spd;
> + int ret;
> +
> + ret = hdmi_spd_infoframe_init(frame,
> + connector->hdmi.vendor,
> + connector->hdmi.product);
> + if (ret)
> + return ret;
> +
> + frame->sdi = HDMI_SPD_SDI_PC;
> +
> + infoframe->set = true;
> +
> + return 0;
> +}
> +
> +static int hdmi_generate_hdr_infoframe(const struct drm_connector *connector,
> + struct drm_connector_state *state)
> +{
> + struct drm_connector_hdmi_infoframe *infoframe =
> + &state->hdmi.infoframes.hdr_drm;
> + struct hdmi_drm_infoframe *frame =
> + &infoframe->data.drm;
> + int ret;
> +
> + if (connector->max_bpc < 10)
> + return 0;
> +
> + if (!state->hdr_output_metadata)
> + return 0;
> +
> + ret = drm_hdmi_infoframe_set_hdr_metadata(frame, state);
> + if (ret)
> + return ret;
> +
> + infoframe->set = true;
> +
> + return 0;
> +}
> +
> +static int hdmi_generate_hdmi_vendor_infoframe(const struct drm_connector *connector,
> + struct drm_connector_state *state)
> +{
> + const struct drm_display_mode *mode =
> + connector_state_get_mode(state);
> + struct drm_connector_hdmi_infoframe *infoframe =
> + &state->hdmi.infoframes.hdmi;
> + struct hdmi_vendor_infoframe *frame =
> + &infoframe->data.vendor.hdmi;
> + int ret;
> +
> + ret = drm_hdmi_vendor_infoframe_from_display_mode(frame, connector, mode);
> + if (ret) {
> + if (ret == -EINVAL)
> + return 0;
> +
> + return ret;
> + }
> +
> + infoframe->set = true;
> +
> + return 0;
> +}
> +
> +static int
> +hdmi_generate_infoframes(const struct drm_connector *connector,
> + struct drm_connector_state *state)
> +{
> + const struct drm_display_info *info = &connector->display_info;
> + int ret;
> +
> + if (!info->is_hdmi)
> + return 0;
> +
> + if (!info->has_hdmi_infoframe)
> + return 0;
> +
> + ret = hdmi_generate_avi_infoframe(connector, state);
> + if (ret)
> + return ret;
> +
> + ret = hdmi_generate_spd_infoframe(connector, state);
> + if (ret)
> + return ret;
> +
> + /*
> + * Audio Infoframes will be generated by ALSA, and updated by
> + * drm_atomic_helper_connector_hdmi_update_audio_infoframe().
> + */
> +
> + ret = hdmi_generate_hdr_infoframe(connector, state);
> + if (ret)
> + return ret;
> +
> + ret = hdmi_generate_hdmi_vendor_infoframe(connector, state);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> /**
> * drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state
> * @connector: DRM Connector
> * @state: the DRM State object
> *
> @@ -941,10 +1079,14 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
>
> ret = hdmi_compute_config(connector, new_state, mode);
> if (ret)
> return ret;
>
> + ret = hdmi_generate_infoframes(connector, new_state);
> + if (ret)
> + return ret;
> +
> if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb ||
> old_state->hdmi.output_bpc != new_state->hdmi.output_bpc ||
> old_state->hdmi.output_format != new_state->hdmi.output_format) {
> struct drm_crtc *crtc = new_state->crtc;
> struct drm_crtc_state *crtc_state;
> @@ -958,10 +1100,195 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
>
> return 0;
> }
> EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_check);
>
> +#define HDMI_MAX_INFOFRAME_SIZE 29
> +
> +static int clear_device_infoframe(struct drm_connector *connector,
> + enum hdmi_infoframe_type type)
> +{
> + const struct drm_connector_hdmi_funcs *funcs = connector->hdmi.funcs;
> +
> + if (!funcs || !funcs->clear_infoframe)
> + return 0;
> +
> + return funcs->clear_infoframe(connector, type);
> +}
> +
> +static int clear_infoframe(struct drm_connector *connector,
> + struct drm_connector_hdmi_infoframe *conn_frame,
> + struct drm_connector_hdmi_infoframe *old_frame)
> +{
> + int ret;
> +
> + ret = clear_device_infoframe(connector, old_frame->data.any.type);
> + if (ret)
> + return ret;
> +
> + memset(old_frame, 0, sizeof(*old_frame));
> +
> + return 0;
> +}
> +
> +static int write_device_infoframe(struct drm_connector *connector,
> + union hdmi_infoframe *frame)
> +{
> + const struct drm_connector_hdmi_funcs *funcs = connector->hdmi.funcs;
> + u8 buffer[HDMI_MAX_INFOFRAME_SIZE];
> + int len;
> +
> + if (!funcs || !funcs->write_infoframe)
> + return -ENOSYS;
> +
> + len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
> + if (len < 0)
> + return len;
> +
> + return funcs->write_infoframe(connector, frame->any.type, buffer, len);
> +}
> +
> +static int write_infoframe(struct drm_connector *connector,
> + struct drm_connector_hdmi_infoframe *conn_frame,
> + struct drm_connector_hdmi_infoframe *new_frame)
> +{
> + int ret;
> +
> + ret = write_device_infoframe(connector, &new_frame->data);
> + if (ret)
> + return ret;
> +
> + if (conn_frame)
> + memcpy(conn_frame, new_frame, sizeof(*conn_frame));
> +
> + return 0;
> +}
> +
> +static int write_or_clear_infoframe(struct drm_connector *connector,
> + struct drm_connector_hdmi_infoframe *conn_frame,
> + struct drm_connector_hdmi_infoframe *old_frame,
> + struct drm_connector_hdmi_infoframe *new_frame)
> +{
> + if (new_frame->set)
> + return write_infoframe(connector, conn_frame, new_frame);
> +
> + if (old_frame->set && !new_frame->set)
> + return clear_infoframe(connector, conn_frame, old_frame);
> +
> + return 0;
> +}
> +
> +#define UPDATE_INFOFRAME(c, os, ns, i) \
> + write_or_clear_infoframe(c, \
> + &(c)->hdmi.infoframes.i, \
> + &(os)->hdmi.infoframes.i, \
> + &(ns)->hdmi.infoframes.i)
> +
> +/**
> + * drm_atomic_helper_connector_hdmi_update_infoframes - Update the Infoframes
> + * @connector: A pointer to the HDMI connector
> + * @state: The HDMI connector state to generate the infoframe from
> + *
> + * This function is meant for HDMI connector drivers to write their
> + * infoframes. It will typically be used in a
> + * @drm_connector_helper_funcs.atomic_enable implementation.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_atomic_helper_connector_hdmi_update_infoframes(struct drm_connector *connector,
> + struct drm_atomic_state *state)
> +{
> + struct drm_connector_state *old_state =
> + drm_atomic_get_old_connector_state(state, connector);
> + struct drm_connector_state *new_state =
> + drm_atomic_get_new_connector_state(state, connector);
> + struct drm_display_info *info = &connector->display_info;
> + int ret;
> +
> + if (!info->is_hdmi)
> + return 0;
> +
> + if (!info->has_hdmi_infoframe)
> + return 0;
> +
> + mutex_lock(&connector->hdmi.infoframes.lock);
> +
> + ret = UPDATE_INFOFRAME(connector, old_state, new_state, avi);
> + if (ret)
> + goto out;
> +
> + if (connector->hdmi.infoframes.audio.set) {
> + ret = write_infoframe(connector,
> + NULL,
> + &connector->hdmi.infoframes.audio);
> + if (ret)
> + goto out;
> + }
> +
> + ret = UPDATE_INFOFRAME(connector, old_state, new_state, hdr_drm);
> + if (ret)
> + goto out;
> +
> + ret = UPDATE_INFOFRAME(connector, old_state, new_state, spd);
> + if (ret)
> + goto out;
> +
> + ret = UPDATE_INFOFRAME(connector, old_state, new_state, hdmi);
> + if (ret)
> + goto out;
> +
> +out:
> + mutex_unlock(&connector->hdmi.infoframes.lock);
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_update_infoframes);
> +
> +#undef UPDATE_INFOFRAME
> +#undef UPDATE_INFOFRAME_TOGGLE
> +
> +/**
> + * drm_atomic_helper_connector_hdmi_update_audio_infoframe - Update the Audio Infoframe
> + * @connector: A pointer to the HDMI connector
> + * @frame: A pointer to the audio infoframe to write
> + *
> + * This function is meant for HDMI connector drivers to update their
> + * audio infoframe. It will typically be used in one of the ALSA hooks
> + * (most likely prepare).
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int
> +drm_atomic_helper_connector_hdmi_update_audio_infoframe(struct drm_connector *connector,
> + struct hdmi_audio_infoframe *frame)
> +{
> + struct drm_connector_hdmi_infoframe infoframe = {};
> + struct drm_display_info *info = &connector->display_info;
> + int ret;
> +
> + if (!info->is_hdmi)
> + return 0;
> +
> + if (!info->has_hdmi_infoframe)
> + return 0;
> +
> + memcpy(&infoframe.data, frame, sizeof(infoframe.data));
> + infoframe.set = true;
> +
> + mutex_lock(&connector->hdmi.infoframes.lock);
> +
> + ret = write_infoframe(connector,
> + &connector->hdmi.infoframes.audio,
> + &infoframe);
> +
> + mutex_unlock(&connector->hdmi.infoframes.lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_update_audio_infoframe);
> +
> /**
> * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
> * @connector: connector object
> * @state: atomic connector state
> *
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 0272e1d05cc6..427816239038 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -276,10 +276,11 @@ static int __drm_connector_init(struct drm_device *dev,
> INIT_LIST_HEAD(&connector->global_connector_list_entry);
> INIT_LIST_HEAD(&connector->probed_modes);
> INIT_LIST_HEAD(&connector->modes);
> mutex_init(&connector->mutex);
> mutex_init(&connector->edid_override_mutex);
> + mutex_init(&connector->hdmi.infoframes.lock);
> connector->edid_blob_ptr = NULL;
> connector->epoch_counter = 0;
> connector->tile_blob_ptr = NULL;
> connector->status = connector_status_unknown;
> connector->display_info.panel_orientation =
> @@ -454,10 +455,12 @@ EXPORT_SYMBOL(drmm_connector_init);
>
> /**
> * drmm_connector_hdmi_init - Init a preallocated HDMI connector
> * @dev: DRM device
> * @connector: A pointer to the HDMI connector to init
> + * @vendor: HDMI Controller Vendor name
> + * @product: HDMI Controller Product name
> * @funcs: callbacks for this connector
> * @hdmi_funcs: HDMI-related callbacks for this connector
> * @connector_type: user visible type of the connector
> * @ddc: optional pointer to the associated ddc adapter
> * @supported_formats: Bitmask of @hdmi_colorspace listing supported output formats
> @@ -474,19 +477,27 @@ EXPORT_SYMBOL(drmm_connector_init);
> * Returns:
> * Zero on success, error code on failure.
> */
> int drmm_connector_hdmi_init(struct drm_device *dev,
> struct drm_connector *connector,
> + const char *vendor, const char *product,
> const struct drm_connector_funcs *funcs,
> const struct drm_connector_hdmi_funcs *hdmi_funcs,
> int connector_type,
> struct i2c_adapter *ddc,
> unsigned long supported_formats,
> unsigned int max_bpc)
> {
> int ret;
>
> + if (!vendor || !product)
> + return -EINVAL;
> +
> + if ((strlen(vendor) > DRM_CONNECTOR_HDMI_VENDOR_LEN) ||
> + (strlen(product) > DRM_CONNECTOR_HDMI_PRODUCT_LEN))
> + return -EINVAL;
> +
> if (!(connector_type == DRM_MODE_CONNECTOR_HDMIA ||
> connector_type == DRM_MODE_CONNECTOR_HDMIB))
> return -EINVAL;
>
> if (!supported_formats || !(supported_formats & BIT(HDMI_COLORSPACE_RGB)))
> @@ -498,10 +509,12 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
> ret = drmm_connector_init(dev, connector, funcs, connector_type, ddc);
> if (ret)
> return ret;
>
> connector->hdmi.supported_formats = supported_formats;
> + strtomem_pad(connector->hdmi.vendor, vendor, 0);
> + strtomem_pad(connector->hdmi.product, product, 0);
>
> /*
> * drm_connector_attach_max_bpc_property() requires the
> * connector to have a state.
> */
> @@ -650,10 +663,11 @@ void drm_connector_cleanup(struct drm_connector *connector)
> WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
> if (connector->state && connector->funcs->atomic_destroy_state)
> connector->funcs->atomic_destroy_state(connector,
> connector->state);
>
> + mutex_destroy(&connector->hdmi.infoframes.lock);
> mutex_destroy(&connector->mutex);
>
> memset(connector, 0, sizeof(*connector));
>
> if (dev->registered)
> diff --git a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
> index dcc0f7486f49..b28409fe65dd 100644
> --- a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
> +++ b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
> @@ -201,10 +201,11 @@ drm_atomic_helper_connector_hdmi_init(struct kunit *test,
>
> enc->possible_crtcs = drm_crtc_mask(priv->crtc);
>
> conn = &priv->connector;
> ret = drmm_connector_hdmi_init(drm, conn,
> + "Vendor", "Product",
> &dummy_connector_funcs,
> &dummy_connector_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> NULL,
> formats,
> diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c
> index d5320a089887..c3f7a3ba6808 100644
> --- a/drivers/gpu/drm/tests/drm_connector_test.c
> +++ b/drivers/gpu/drm/tests/drm_connector_test.c
> @@ -187,10 +187,11 @@ static void drm_test_connector_hdmi_init_valid(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -206,10 +207,11 @@ static void drm_test_connector_hdmi_init_null_ddc(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> NULL,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -225,10 +227,11 @@ static void drm_test_connector_hdmi_init_bpc_invalid(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -244,10 +247,11 @@ static void drm_test_connector_hdmi_init_bpc_null(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -267,10 +271,11 @@ static void drm_test_connector_hdmi_init_bpc_8(struct kunit *test)
> struct drm_property *prop;
> uint64_t val;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -302,10 +307,11 @@ static void drm_test_connector_hdmi_init_bpc_10(struct kunit *test)
> struct drm_property *prop;
> uint64_t val;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -337,10 +343,11 @@ static void drm_test_connector_hdmi_init_bpc_12(struct kunit *test)
> struct drm_property *prop;
> uint64_t val;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -368,10 +375,11 @@ static void drm_test_connector_hdmi_init_formats_empty(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> 0,
> @@ -387,10 +395,11 @@ static void drm_test_connector_hdmi_init_formats_no_rgb(struct kunit *test)
> {
> struct drm_connector_init_priv *priv = test->priv;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_YUV422),
> @@ -407,10 +416,11 @@ static void drm_test_connector_hdmi_init_type_valid(struct kunit *test)
> struct drm_connector_init_priv *priv = test->priv;
> unsigned int connector_type = *(unsigned int *)test->param_value;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> connector_type,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -441,10 +451,11 @@ static void drm_test_connector_hdmi_init_type_invalid(struct kunit *test)
> struct drm_connector_init_priv *priv = test->priv;
> unsigned int connector_type = *(unsigned int *)test->param_value;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> connector_type,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> @@ -706,10 +717,11 @@ static void drm_test_drm_connector_attach_broadcast_rgb_property_hdmi_connector(
> struct drm_connector *connector = &priv->connector;
> struct drm_property *prop;
> int ret;
>
> ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + "Vendor", "Product",
> &dummy_funcs,
> &dummy_hdmi_funcs,
> DRM_MODE_CONNECTOR_HDMIA,
> &priv->ddc,
> BIT(HDMI_COLORSPACE_RGB),
> diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
> index d59d2b3aef9a..22f083968aa8 100644
> --- a/include/drm/drm_atomic_state_helper.h
> +++ b/include/drm/drm_atomic_state_helper.h
> @@ -38,10 +38,12 @@ struct drm_connector_state;
> struct drm_private_obj;
> struct drm_private_state;
> struct drm_modeset_acquire_ctx;
> struct drm_device;
>
> +struct hdmi_audio_infoframe;
> +
> void __drm_atomic_helper_crtc_state_reset(struct drm_crtc_state *state,
> struct drm_crtc *crtc);
> void __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
> struct drm_crtc_state *state);
> void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
> @@ -86,10 +88,16 @@ struct drm_connector_state *
> drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
> void
> __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
> void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> struct drm_connector_state *state);
> +
> +int drm_atomic_helper_connector_hdmi_update_audio_infoframe(struct drm_connector *connector,
> + struct hdmi_audio_infoframe *frame);
> +int drm_atomic_helper_connector_hdmi_update_infoframes(struct drm_connector *connector,
> + struct drm_atomic_state *state);
> +
> void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
> struct drm_private_state *state);
>
> void __drm_atomic_helper_bridge_duplicate_state(struct drm_bridge *bridge,
> struct drm_bridge_state *state);
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 3eaf4d54364d..5964ef283022 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -912,10 +912,25 @@ struct drm_tv_connector_state {
> unsigned int overscan;
> unsigned int saturation;
> unsigned int hue;
> };
>
> +/**
> + * struct drm_connector_hdmi_infoframe - HDMI Infoframe container
> + */
> +struct drm_connector_hdmi_infoframe {
> + /**
> + * @data: HDMI Infoframe structure
> + */
> + union hdmi_infoframe data;
> +
> + /**
> + * @set: Is the content of @data valid?
> + */
> + bool set;
> +};
> +
> /**
> * struct drm_connector_state - mutable connector state
> */
> struct drm_connector_state {
> /** @connector: backpointer to the connector */
> @@ -1068,10 +1083,39 @@ struct drm_connector_state {
> * @broadcast_rgb: Connector property to pass the
> * Broadcast RGB selection value.
> */
> enum drm_hdmi_broadcast_rgb broadcast_rgb;
>
> + /**
> + * @infoframes: HDMI Infoframes matching that state
> + */
> + struct {
> + /**
> + * @avi: AVI Infoframes structure matching our
> + * state.
> + */
> + struct drm_connector_hdmi_infoframe avi;
> +
> + /**
> + * @hdr_drm: DRM (Dynamic Range and Mastering)
> + * Infoframes structure matching our state.
> + */
> + struct drm_connector_hdmi_infoframe hdr_drm;
> +
> + /**
> + * @spd: SPD Infoframes structure matching our
> + * state.
> + */
> + struct drm_connector_hdmi_infoframe spd;
> +
> + /**
> + * @vendor: HDMI Vendor Infoframes structure
> + * matching our state.
> + */
> + struct drm_connector_hdmi_infoframe hdmi;
> + } infoframes;
> +
> /**
> * @is_full_range: Is the output supposed to use a full
> * RGB Quantization Range or not?
> */
> bool is_full_range;
> @@ -1113,10 +1157,45 @@ struct drm_connector_hdmi_funcs {
> */
> enum drm_mode_status
> (*tmds_char_rate_valid)(const struct drm_connector *connector,
> const struct drm_display_mode *mode,
> unsigned long long tmds_rate);
> +
> + /**
> + * @clear_infoframe:
> + *
> + * This callback is invoked through
> + * @drm_atomic_helper_hdmi_connector_update_infoframes during a
Nit: drm_atomic_helper_connector_hdmi_update_infoframes
> + * commit to clear the infoframes into the hardware. It will be
> + * called multiple times, once for every disabled infoframe
> + * type.
> + *
> + * The @clear_infoframe callback is optional.
> + *
> + * Returns:
> + * 0 on success, a negative error code otherwise
> + */
> + int (*clear_infoframe)(struct drm_connector *connector,
> + enum hdmi_infoframe_type type);
> +
> + /**
> + * @write_infoframe:
> + *
> + * This callback is invoked through
> + * @drm_atomic_helper_hdmi_connector_update_infoframes during a
And here
> + * commit to program the infoframes into the hardware. It will
> + * be called multiple times, once for every updated infoframe
> + * type.
> + *
> + * The @write_infoframe callback is mandatory.
> + *
> + * Returns:
> + * 0 on success, a negative error code otherwise
> + */
> + int (*write_infoframe)(struct drm_connector *connector,
> + enum hdmi_infoframe_type type,
> + const u8 *buffer, size_t len);
> };
>
> /**
> * struct drm_connector_funcs - control connectors on a given device
> *
> @@ -1984,20 +2063,73 @@ struct drm_connector {
>
> /**
> * @hdmi: HDMI-related variable and properties.
> */
> struct {
> +#define DRM_CONNECTOR_HDMI_VENDOR_LEN 8
> + /**
> + * @vendor: HDMI Controller Vendor Name
> + */
> + unsigned char vendor[DRM_CONNECTOR_HDMI_VENDOR_LEN] __nonstring;
> +
> +#define DRM_CONNECTOR_HDMI_PRODUCT_LEN 16
> + /**
> + * @product: HDMI Controller Product Name
> + */
> + unsigned char product[DRM_CONNECTOR_HDMI_PRODUCT_LEN] __nonstring;
> +
> /**
> * @supported_formats: Bitmask of @hdmi_colorspace
> * supported by the controller.
> */
> unsigned long supported_formats;
>
> /**
> * @funcs: HDMI connector Control Functions
> */
> const struct drm_connector_hdmi_funcs *funcs;
> +
> + /**
> + * @infoframes: Current Infoframes output by the connector
> + */
> + struct {
> + /**
> + * @lock: Mutex protecting against concurrent access to
> + * the infoframes, most notably between KMS and ALSA.
> + */
> + struct mutex lock;
> +
> + /**
> + * @audio: Current Audio Infoframes structure. Protected
> + * by @lock.
> + */
> + struct drm_connector_hdmi_infoframe audio;
> +
> + /**
> + * @avi: Current AVI Infoframes structure. Protected by
> + * @lock.
> + */
> + struct drm_connector_hdmi_infoframe avi;
> +
> + /**
> + * @hdr_drm: Current DRM (Dynamic Range and Mastering)
> + * Infoframes structure. Protected by @lock.
> + */
> + struct drm_connector_hdmi_infoframe hdr_drm;
> +
> + /**
> + * @spd: Current SPD Infoframes structure. Protected by
> + * @lock.
> + */
> + struct drm_connector_hdmi_infoframe spd;
> +
> + /**
> + * @vendor: Current HDMI Vendor Infoframes structure.
> + * Protected by @lock.
> + */
> + struct drm_connector_hdmi_infoframe hdmi;
> + } infoframes;
> } hdmi;
> };
>
> #define obj_to_connector(x) container_of(x, struct drm_connector, base)
>
> @@ -2015,10 +2147,11 @@ int drmm_connector_init(struct drm_device *dev,
> const struct drm_connector_funcs *funcs,
> int connector_type,
> struct i2c_adapter *ddc);
> int drmm_connector_hdmi_init(struct drm_device *dev,
> struct drm_connector *connector,
> + const char *vendor, const char *product,
> const struct drm_connector_funcs *funcs,
> const struct drm_connector_hdmi_funcs *hdmi_funcs,
> int connector_type,
> struct i2c_adapter *ddc,
> unsigned long supported_formats,
>
> --
> 2.43.2
>
--
With best wishes
Dmitry
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