@@ -99,6 +99,7 @@ config DRM_KUNIT_TEST
config DRM_KMS_HELPER
tristate
depends on DRM
+ select DRM_DISPLAY_HDMI_HELPER
help
CRTC helpers for KMS drivers.
@@ -38,6 +38,8 @@
#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>
@@ -893,6 +895,142 @@ 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.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_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.vendor;
+ 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_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
@@ -922,6 +1060,10 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
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) {
@@ -939,6 +1081,191 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
}
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, 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, vendor);
+ 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
@@ -456,6 +456,8 @@ 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
@@ -476,6 +478,7 @@ EXPORT_SYMBOL(drmm_connector_init);
*/
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,
@@ -494,6 +497,12 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
return ret;
connector->hdmi.supported_formats = supported_formats;
+ strscpy(connector->hdmi.vendor, vendor, sizeof(connector->hdmi.vendor));
+ strscpy(connector->hdmi.product, product, sizeof(connector->hdmi.product));
+
+ ret = drmm_mutex_init(dev, &connector->hdmi.infoframes.lock);
+ if (ret)
+ return ret;
if (max_bpc) {
if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
@@ -40,6 +40,8 @@ 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,
@@ -89,6 +91,11 @@ __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);
@@ -905,6 +905,21 @@ struct drm_tv_connector_state {
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
*/
@@ -1057,6 +1072,35 @@ struct drm_connector_state {
*/
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;
+
+ /**
+ * @drm: DRM Infoframes structure matching our
+ * state.
+ */
+ struct drm_connector_hdmi_infoframe drm;
+
+ /**
+ * @spd: SPD Infoframes structure matching our
+ * state.
+ */
+ struct drm_connector_hdmi_infoframe spd;
+
+ /**
+ * @vendor: Vendor Infoframes structure matching
+ * our state.
+ */
+ struct drm_connector_hdmi_infoframe vendor;
+ } infoframes;
+
/**
* @is_full_range: Is the output supposed to use a full
* RGB Quantization Range or not?
@@ -1102,6 +1146,41 @@ struct drm_connector_hdmi_funcs {
(*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
+ * 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
+ * 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);
};
/**
@@ -1969,6 +2048,16 @@ struct drm_connector {
struct hdr_sink_metadata hdr_sink_metadata;
struct {
+ /**
+ * @vendor: HDMI Controller Vendor Name
+ */
+ char vendor[8];
+
+ /**
+ * @product: HDMI Controller Product Name
+ */
+ char product[16];
+
/**
* @supported_formats: Bitmask of @hdmi_colorspace
* supported by the controller.
@@ -1979,6 +2068,47 @@ struct drm_connector {
* @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;
+
+ /**
+ * @drm: Current DRM Infoframes structure. Protected by
+ * @lock.
+ */
+ struct drm_connector_hdmi_infoframe drm;
+
+ /**
+ * @spd: Current SPD Infoframes structure. Protected by
+ * @lock.
+ */
+ struct drm_connector_hdmi_infoframe spd;
+
+ /**
+ * @vendor: Current Vendor Infoframes structure.
+ * Protected by @lock.
+ */
+ struct drm_connector_hdmi_infoframe vendor;
+ } infoframes;
} hdmi;
};
@@ -2000,6 +2130,7 @@ int drmm_connector_init(struct drm_device *dev,
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,