[PATCH v10 20/27] drm/connector: hdmi: Add Infoframes generation

From: Maxime Ripard
Date: Thu Mar 21 2024 - 11:35:57 EST

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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@xxxxxxxxxx>
---
drivers/gpu/drm/Kconfig | 1 +
drivers/gpu/drm/drm_atomic_state_helper.c | 338 +++++++++++++++++++++
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 | 109 +++++++
7 files changed, 483 insertions(+)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 16029435b750..3d3193c7aa5f 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 8d436fdc5c91..e0c2b97e5ca5 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
@@ -924,10 +926,148 @@ 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 *conn_state)
+{
+ const struct drm_display_mode *mode =
+ connector_state_get_mode(conn_state);
+ struct drm_connector_hdmi_infoframe *infoframe =
+ &conn_state->hdmi.infoframes.avi;
+ struct hdmi_avi_infoframe *frame =
+ &infoframe->data.avi;
+ bool is_full_range = conn_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 = conn_state->hdmi.output_format;
+
+ /*
+ * FIXME: drm_hdmi_avi_infoframe_quant_range() doesn't handle
+ * YUV formats at all at the moment, so if we ever support YUV
+ * formats this needs to be revised.
+ */
+ drm_hdmi_avi_infoframe_quant_range(frame, connector, mode, rgb_quant_range);
+ drm_hdmi_avi_infoframe_colorimetry(frame, conn_state);
+ drm_hdmi_avi_infoframe_bars(frame, conn_state);
+
+ infoframe->set = true;
+
+ return 0;
+}
+
+static int hdmi_generate_spd_infoframe(const struct drm_connector *connector,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_connector_hdmi_infoframe *infoframe =
+ &conn_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 *conn_state)
+{
+ struct drm_connector_hdmi_infoframe *infoframe =
+ &conn_state->hdmi.infoframes.hdr_drm;
+ struct hdmi_drm_infoframe *frame =
+ &infoframe->data.drm;
+ int ret;
+
+ if (connector->max_bpc < 10)
+ return 0;
+
+ if (!conn_state->hdr_output_metadata)
+ return 0;
+
+ ret = drm_hdmi_infoframe_set_hdr_metadata(frame, conn_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 *conn_state)
+{
+ const struct drm_display_info *info = &connector->display_info;
+ const struct drm_display_mode *mode =
+ connector_state_get_mode(conn_state);
+ struct drm_connector_hdmi_infoframe *infoframe =
+ &conn_state->hdmi.infoframes.hdmi;
+ struct hdmi_vendor_infoframe *frame =
+ &infoframe->data.vendor.hdmi;
+ int ret;
+
+ if (!info->has_hdmi_infoframe)
+ return 0;
+
+ ret = drm_hdmi_vendor_infoframe_from_display_mode(frame, connector, mode);
+ if (ret)
+ return ret;
+
+ infoframe->set = true;
+
+ return 0;
+}
+
+static int
+hdmi_generate_infoframes(const struct drm_connector *connector,
+ struct drm_connector_state *conn_state)
+{
+ const struct drm_display_info *info = &connector->display_info;
+ int ret;
+
+ if (!info->is_hdmi)
+ return 0;
+
+ ret = hdmi_generate_avi_infoframe(connector, conn_state);
+ if (ret)
+ return ret;
+
+ ret = hdmi_generate_spd_infoframe(connector, conn_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, conn_state);
+ if (ret)
+ return ret;
+
+ ret = hdmi_generate_hdmi_vendor_infoframe(connector, conn_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
*
@@ -953,10 +1093,14 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,

ret = hdmi_compute_config(connector, new_conn_state, mode);
if (ret)
return ret;

+ ret = hdmi_generate_infoframes(connector, new_conn_state);
+ if (ret)
+ return ret;
+
if (old_conn_state->hdmi.broadcast_rgb != new_conn_state->hdmi.broadcast_rgb ||
old_conn_state->hdmi.output_bpc != new_conn_state->hdmi.output_bpc ||
old_conn_state->hdmi.output_format != new_conn_state->hdmi.output_format) {
struct drm_crtc *crtc = new_conn_state->crtc;
struct drm_crtc_state *crtc_state;
@@ -970,10 +1114,204 @@ 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;
+ struct drm_device *dev = connector->dev;
+ int ret;
+
+ drm_dbg_kms(dev, "Clearing infoframe type 0x%x\n", type);
+
+ if (!funcs || !funcs->clear_infoframe) {
+ drm_dbg_kms(dev, "Function not implemented, bailing.\n");
+ return 0;
+ }
+
+ ret = funcs->clear_infoframe(connector, type);
+ if (ret) {
+ drm_dbg_kms(dev, "Call failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int clear_infoframe(struct drm_connector *connector,
+ struct drm_connector_hdmi_infoframe *old_frame)
+{
+ int ret;
+
+ ret = clear_device_infoframe(connector, old_frame->data.any.type);
+ if (ret)
+ return ret;
+
+ 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;
+ struct drm_device *dev = connector->dev;
+ u8 buffer[HDMI_MAX_INFOFRAME_SIZE];
+ int ret;
+ int len;
+
+ drm_dbg_kms(dev, "Writing infoframe type %x\n", frame->any.type);
+
+ if (!funcs || !funcs->write_infoframe) {
+ drm_dbg_kms(dev, "Function not implemented, bailing.\n");
+ return -ENOSYS;
+ }
+
+ len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
+ if (len < 0)
+ return len;
+
+ ret = funcs->write_infoframe(connector, frame->any.type, buffer, len);
+ if (ret) {
+ drm_dbg_kms(dev, "Call failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int write_infoframe(struct drm_connector *connector,
+ struct drm_connector_hdmi_infoframe *new_frame)
+{
+ int ret;
+
+ ret = write_device_infoframe(connector, &new_frame->data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int write_or_clear_infoframe(struct drm_connector *connector,
+ struct drm_connector_hdmi_infoframe *old_frame,
+ struct drm_connector_hdmi_infoframe *new_frame)
+{
+ if (new_frame->set)
+ return write_infoframe(connector, new_frame);
+
+ if (old_frame->set && !new_frame->set)
+ return clear_infoframe(connector, old_frame);
+
+ return 0;
+}
+
+/**
+ * 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_conn_state =
+ drm_atomic_get_old_connector_state(state, connector);
+ struct drm_connector_state *new_conn_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;
+
+ mutex_lock(&connector->hdmi.infoframes.lock);
+
+ ret = write_or_clear_infoframe(connector,
+ &old_conn_state->hdmi.infoframes.avi,
+ &new_conn_state->hdmi.infoframes.avi);
+ if (ret)
+ goto out;
+
+ if (connector->hdmi.infoframes.audio.set) {
+ ret = write_infoframe(connector,
+ &connector->hdmi.infoframes.audio);
+ if (ret)
+ goto out;
+ }
+
+ ret = write_or_clear_infoframe(connector,
+ &old_conn_state->hdmi.infoframes.hdr_drm,
+ &new_conn_state->hdmi.infoframes.hdr_drm);
+ if (ret)
+ goto out;
+
+ ret = write_or_clear_infoframe(connector,
+ &old_conn_state->hdmi.infoframes.spd,
+ &new_conn_state->hdmi.infoframes.spd);
+ if (ret)
+ goto out;
+
+ if (info->has_hdmi_infoframe) {
+ ret = write_or_clear_infoframe(connector,
+ &old_conn_state->hdmi.infoframes.hdmi,
+ &new_conn_state->hdmi.infoframes.hdmi);
+ if (ret)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&connector->hdmi.infoframes.lock);
+ return ret;
+}
+EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_update_infoframes);
+
+/**
+ * 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 =
+ &connector->hdmi.infoframes.audio;
+ struct drm_display_info *info = &connector->display_info;
+ int ret;
+
+ if (!info->is_hdmi)
+ return 0;
+
+ mutex_lock(&connector->hdmi.infoframes.lock);
+
+ memcpy(&infoframe->data, frame, sizeof(infoframe->data));
+ infoframe->set = true;
+
+ ret = write_infoframe(connector, 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 088e6ba286bf..140728b5d2a5 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 7c47c1ddc6ba..2d6939656cbf 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 b8bdd366104d..98d0a676f3c0 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..4f2e7c3c40ae 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_connector_hdmi_update_infoframes during a
+ * 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_connector_hdmi_update_infoframes during a
+ * 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 +2063,49 @@ 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;
+ } infoframes;
} hdmi;
};

#define obj_to_connector(x) container_of(x, struct drm_connector, base)

@@ -2015,10 +2123,11 @@ 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,

--
2.44.0

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