Merge tag 'drm-misc-next-2024-02-29' of...

As a remedy for such situations, the kernel configuration item

CONFIG_DRM_LOAD_EDID_FIRMWARE was introduced. It allows to provide an

individually prepared or corrected EDID data set in the /lib/firmware

directory from where it is loaded via the firmware interface. The code

(see drivers/gpu/drm/drm_edid_load.c) contains built-in data sets for

commonly used screen resolutions (800x600, 1024x768, 1280x1024, 1600x1200,

1680x1050, 1920x1080) as binary blobs, but the kernel source tree does

not contain code to create these data. In order to elucidate the origin

of the built-in binary EDID blobs and to facilitate the creation of

individual data for a specific misbehaving monitor, commented sources

and a Makefile environment are given here.

To create binary EDID and C source code files from the existing data

material, simply type "make" in tools/edid/.

If you want to create your own EDID file, copy the file 1024x768.S,

replace the settings with your own data and add a new target to the

Makefile. Please note that the EDID data structure expects the timing

values in a different way as compared to the standard X11 format.

X11:

  HTimings:

    hdisp hsyncstart hsyncend htotal

  VTimings:

    vdisp vsyncstart vsyncend vtotal

EDID::

  #define XPIX hdisp

  #define XBLANK htotal-hdisp

  #define XOFFSET hsyncstart-hdisp

  #define XPULSE hsyncend-hsyncstart

  #define YPIX vdisp

  #define YBLANK vtotal-vdisp

  #define YOFFSET vsyncstart-vdisp

  #define YPULSE vsyncend-vsyncstart

directory from where it is loaded via the firmware interface.

			panels may send no or incorrect EDID data sets.

			This parameter allows to specify an EDID data sets

			in the /lib/firmware directory that are used instead.

			Generic built-in EDID data sets are used, if one of

			edid/1024x768.bin, edid/1280x1024.bin,

			edid/1680x1050.bin, or edid/1920x1080.bin is given

			and no file with the same name exists. Details and

			instructions how to build your own EDID data are

			available in Documentation/admin-guide/edid.rst. An EDID

			data set will only be used for a particular connector,

			if its name and a colon are prepended to the EDID

			name. Each connector may use a unique EDID data

			set by separating the files with a comma.  An EDID

			An EDID data set will only be used for a particular

			connector, if its name and a colon are prepended to

			the EDID name. Each connector may use a unique EDID

			data set by separating the files with a comma. An EDID

			data set with no connector name will be used for

			any connectors not explicitly specified.

module_param(mhi_timeout_ms, uint, 0600);

MODULE_PARM_DESC(mhi_timeout_ms, "MHI controller timeout value");

static struct mhi_channel_config aic100_channels[] = {

static const struct mhi_channel_config aic100_channels[] = {

	{

		.name = "QAIC_LOOPBACK",

		.num = 0,

	mutex_lock(&aux->hw_mutex);

	/*

	 * If the device attached to the aux bus is powered down then there's

	 * no reason to attempt a transfer. Error out immediately.

	 */

	if (aux->powered_down) {

		ret = -EBUSY;

		goto unlock;

	}

	/*

	 * The specification doesn't give any recommendation on how often to

	 * retry native transactions. We used to retry 7 times like for

}

EXPORT_SYMBOL(drm_dp_dpcd_probe);

/**

 * drm_dp_dpcd_set_powered() - Set whether the DP device is powered

 * @aux: DisplayPort AUX channel; for convenience it's OK to pass NULL here

 *       and the function will be a no-op.

 * @powered: true if powered; false if not

 *

 * If the endpoint device on the DP AUX bus is known to be powered down

 * then this function can be called to make future transfers fail immediately

 * instead of needing to time out.

 *

 * If this function is never called then a device defaults to being powered.

 */

void drm_dp_dpcd_set_powered(struct drm_dp_aux *aux, bool powered)

{

	if (!aux)

		return;

	mutex_lock(&aux->hw_mutex);

	aux->powered_down = !powered;

	mutex_unlock(&aux->hw_mutex);

}

EXPORT_SYMBOL(drm_dp_dpcd_set_powered);

/**

 * drm_dp_dpcd_read() - read a series of bytes from the DPCD

 * @aux: DisplayPort AUX channel (SST or MST)

	struct drm_dp_aux_msg msg;

	int err = 0;

	if (aux->powered_down)

		return -EBUSY;

	dp_aux_i2c_transfer_size = clamp(dp_aux_i2c_transfer_size, 1, DP_AUX_MAX_PAYLOAD_BYTES);

	memset(&msg, 0, sizeof(msg));

}

EXPORT_SYMBOL(drm_dp_vsc_sdp_log);

/**

 * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported

 * @aux: DisplayPort AUX channel

 * @dpcd: DisplayPort configuration data

 *

 * Returns true if vsc sdp is supported, else returns false

 */

bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE])

{

	u8 rx_feature;

	if (dpcd[DP_DPCD_REV] < DP_DPCD_REV_13)

		return false;

	if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) {

		drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n");

		return false;

	}

	return (rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED);

}

EXPORT_SYMBOL(drm_dp_vsc_sdp_supported);

/**

 * drm_dp_vsc_sdp_pack() - pack a given vsc sdp into generic dp_sdp

 * @vsc: vsc sdp initialized according to its purpose as defined in

 *       table 2-118 - table 2-120 in DP 1.4a specification

 * @sdp: valid handle to the generic dp_sdp which will be packed

 *

 * Returns length of sdp on success and error code on failure

 */

ssize_t drm_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,

			    struct dp_sdp *sdp)

{

	size_t length = sizeof(struct dp_sdp);

	memset(sdp, 0, sizeof(struct dp_sdp));

	/*

	 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119

	 * VSC SDP Header Bytes

	 */

	sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */

	sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */

	sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */

	sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */

	if (vsc->revision == 0x6) {

		sdp->db[0] = 1;

		sdp->db[3] = 1;

	}

	/*

	 * Revision 0x5 and revision 0x7 supports Pixel Encoding/Colorimetry

	 * Format as per DP 1.4a spec and DP 2.0 respectively.

	 */

	if (!(vsc->revision == 0x5 || vsc->revision == 0x7))

		goto out;

	/* VSC SDP Payload for DB16 through DB18 */

	/* Pixel Encoding and Colorimetry Formats  */

	sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */

	sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */

	switch (vsc->bpc) {

	case 6:

		/* 6bpc: 0x0 */

		break;

	case 8:

		sdp->db[17] = 0x1; /* DB17[3:0] */

		break;

	case 10:

		sdp->db[17] = 0x2;

		break;

	case 12:

		sdp->db[17] = 0x3;

		break;

	case 16:

		sdp->db[17] = 0x4;

		break;

	default:

		WARN(1, "Missing case %d\n", vsc->bpc);

		return -EINVAL;

	}

	/* Dynamic Range and Component Bit Depth */

	if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)

		sdp->db[17] |= 0x80;  /* DB17[7] */

	/* Content Type */

	sdp->db[18] = vsc->content_type & 0x7;

out:

	return length;

}

EXPORT_SYMBOL(drm_dp_vsc_sdp_pack);

/**

 * drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON

 * @dpcd: DisplayPort configuration data

	return drm_mode_set_config_internal(&set);

}

static unsigned int drm_num_crtcs(struct drm_device *dev)

{

	unsigned int num = 0;

	struct drm_crtc *tmp;

	drm_for_each_crtc(tmp, dev) {

		num++;

	}

	return num;

}

int drm_crtc_register_all(struct drm_device *dev)

{

	struct drm_crtc *crtc;

	if (name) {

		crtc->name = kvasprintf(GFP_KERNEL, name, ap);

	} else {

		crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",

				       drm_num_crtcs(dev));

		crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", config->num_crtc);

	}

	if (!crtc->name) {

		drm_mode_object_unregister(dev, &crtc->base);