Dne sreda, 20. september 2023 ob 16:35:26 CEST je Maxime Ripard napisal(a):
> 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 | 327 ++++++++++++++++++++++++++++++
> drivers/gpu/drm/drm_connector.c | 9 +
> include/drm/drm_atomic_state_helper.h | 6 +
> include/drm/drm_connector.h | 131 ++++++++++++
> 5 files changed, 474 insertions(+)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index ab9ef1c20349..10caf2dcce93 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -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.
>
> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> index 2f85422cccd4..5bbdd2f7d306 100644
> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> @@ -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>
>
> @@ -839,6 +841,142 @@ 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_adjusted_mode(state);
> + struct drm_connector_hdmi_infoframe *infoframe =
> + &state->hdmi.infoframes.avi;
> + struct hdmi_avi_infoframe *frame =
> + &infoframe->data.avi;
> + bool is_lim_range =
> + drm_atomic_helper_connector_hdmi_is_full_range(connector,
> + state);
> + enum hdmi_quantization_range rgb_quant_range =
> + is_lim_range ? HDMI_QUANTIZATION_RANGE_FULL : HDMI_QUANTIZATION_RANGE_LIMITED;
While usage of is_lim_range is correct, its name is off. Replace lim with full.
Best regards,
Jernej
> + 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_adjusted_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 == -EINVAL)
> + return 0;
> + else
> + 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
> @@ -866,6 +1004,10 @@ 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) {
> @@ -912,6 +1054,191 @@ drm_atomic_helper_connector_hdmi_is_full_range(const struct drm_connector *conne
> }
> EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_is_full_range);
>
> +#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
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 2bc52465f940..a338552bab19 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -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))
> diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
> index c6d941b9e846..4d445ff907f0 100644
> --- a/include/drm/drm_atomic_state_helper.h
> +++ b/include/drm/drm_atomic_state_helper.h
> @@ -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,
> @@ -92,6 +94,10 @@ void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> bool
> drm_atomic_helper_connector_hdmi_is_full_range(const struct drm_connector *connector,
> const 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);
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 468cae3cb739..b5c21e971439 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -908,6 +908,21 @@ 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
> */
> @@ -1060,6 +1075,35 @@ 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;
> +
> /**
> * @output_bpc: Bits per character to output.
> */
> @@ -1099,6 +1143,41 @@ 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);
> };
>
> /**
> @@ -1966,6 +2045,16 @@ 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.
> @@ -1976,6 +2065,47 @@ 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;
> };
>
> @@ -1997,6 +2127,7 @@ 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,
>
>
