Lines Matching +full:needs +full:- +full:hpd
75 * struct drm_dp_vsc_sdp - drm DP VSC SDP
78 * It is based on DP 1.4 spec [Table 2-116: VSC SDP Header Bytes] and
79 * [Table 2-117: VSC SDP Payload for DB16 through DB18]
81 * @sdp_type: secondary-data packet type
88 * @content_type: CTA-861-G defines content types and expected processing by a sink device
102 * struct drm_dp_as_sdp - drm DP Adaptive Sync SDP
105 * It is based on DP 2.1 spec [Table 2-126: Adaptive-Sync SDP Header Bytes] and
106 * [Table 2-127: Adaptive-Sync SDP Payload for DB0 through DB8]
108 * @sdp_type: Secondary-data packet type
210 return dsc_dpcd[DP_DSC_SUPPORT - DP_DSC_SUPPORT] &
217 return dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_LOW - DP_DSC_SUPPORT] |
218 ((dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] &
226 return dsc_dpcd[DP_DSC_MAX_SLICE_WIDTH - DP_DSC_SUPPORT] *
231 * drm_dp_dsc_sink_supports_format() - check if sink supports DSC with given output format
232 * @dsc_dpcd : DSC-capability DPCDs of the sink
240 return dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT] & output_format;
278 * drm_edp_backlight_supported() - Check an eDP DPCD for VESA backlight support
295 * drm_dp_is_uhbr_rate - Determine if a link rate is UHBR
312 * struct drm_dp_aux_msg - DisplayPort AUX channel transaction
332 * struct drm_dp_aux_cec - DisplayPort CEC-Tunneling-over-AUX
334 * @adap: the CEC adapter for CEC-Tunneling-over-AUX support.
346 * struct drm_dp_aux - DisplayPort AUX channel
360 * @name: user-visible name of this AUX channel and the
361 * I2C-over-AUX adapter.
369 * @ddc: I2C adapter that can be used for I2C-over-AUX
403 * channels, the driver needs to do additional locking to
422 * This is a hardware-specific implementation of how
428 * were transferred, or a negative error-code on failure.
431 * the %-EBUSY error, which causes a transaction to be retried.
432 * On a short, helpers will return %-EPROTO to make it simpler
443 * - If the @dev providing the AUX bus is currently unpowered then
446 * - If we're on eDP (using a drm_panel) and the panel is not in a
460 * @wait_hpd_asserted: wait for HPD to be asserted
467 * we're not using the AUX controller's HPD. One example of the panel
468 * driver not needing to call this is if HPD is hooked up to a GPIO
472 * may still support eDP panels that use the AUX controller's built-in
473 * HPD signal by implementing a long wait for HPD in the transfer()
476 * This function will efficiently wait for the HPD signal to be
478 * know that the HPD signal is expected to be asserted within `wait_us`
484 * This function returns 0 if HPD was asserted or -ETIMEDOUT if time
485 * expired and HPD wasn't asserted. This function should not print
492 * NOTE: this function specifically reports the state of the HPD pin
494 * the HPD concept in much of the rest of DRM which is more about
496 * assumed always present even if the HPD pin is deasserted.
509 * @cec: struct containing fields used for CEC-Tunneling-over-AUX.
542 * drm_dp_dpcd_read_data() - read a series of bytes from the DPCD
549 * code on failure. -EIO is returned if the request was NAKed by the sink or
551 * function returns -EPROTO. Errors from the underlying AUX channel transfer
552 * function, with the exception of -EBUSY (which causes the transaction to
565 return -EPROTO;
571 * drm_dp_dpcd_write_data() - write a series of bytes to the DPCD
578 * code on failure. -EIO is returned if the request was NAKed by the sink or
580 * function returns -EPROTO. Errors from the underlying AUX channel transfer
581 * function, with the exception of -EBUSY (which causes the transaction to
594 return -EPROTO;
600 * drm_dp_dpcd_readb() - read a single byte from the DPCD
616 * drm_dp_dpcd_writeb() - write a single byte to the DPCD
632 * drm_dp_dpcd_read_byte() - read a single byte from the DPCD
646 * drm_dp_dpcd_write_byte() - write a single byte to the DPCD
758 * struct drm_dp_desc - DP branch/sink device descriptor
773 * enum drm_dp_quirk - Display Port sink/branch device specific quirks
797 * The device does not set SINK_COUNT to a non-zero value.
826 * drm_dp_has_quirk() - does the DP device have a specific quirk
835 return desc->quirks & BIT(quirk);
839 * struct drm_edp_backlight_info - Probed eDP backlight info struct
841 * @pwm_freq_pre_divider: The PWM frequency pre-divider value being used for this backlight, if any
928 * struct drm_dp_phy_test_params - DP Phy Compliance parameters