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Edit File: drm_connector.h

/* * Copyright (c) 2016 Intel Corporation * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #ifndef __DRM_CONNECTOR_H__ #define __DRM_CONNECTOR_H__ #include <linux/list.h> #include <linux/llist.h> #include <linux/ctype.h> #include <linux/hdmi.h> #include <drm/drm_mode_object.h> #include <drm/drm_util.h> #include <uapi/drm/drm_mode.h> struct drm_connector_helper_funcs; struct drm_modeset_acquire_ctx; struct drm_device; struct drm_crtc; struct drm_encoder; struct drm_property; struct drm_property_blob; struct drm_printer; struct edid; struct i2c_adapter; enum drm_connector_force { DRM_FORCE_UNSPECIFIED, DRM_FORCE_OFF, DRM_FORCE_ON, /* force on analog part normally */ DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */ }; /** * enum drm_connector_status - status for a &drm_connector * * This enum is used to track the connector status. There are no separate * #defines for the uapi! */ enum drm_connector_status { /** * @connector_status_connected: The connector is definitely connected to * a sink device, and can be enabled. */ connector_status_connected = 1, /** * @connector_status_disconnected: The connector isn't connected to a * sink device which can be autodetect. For digital outputs like DP or * HDMI (which can be realiable probed) this means there's really * nothing there. It is driver-dependent whether a connector with this * status can be lit up or not. */ connector_status_disconnected = 2, /** * @connector_status_unknown: The connector's status could not be * reliably detected. This happens when probing would either cause * flicker (like load-detection when the connector is in use), or when a * hardware resource isn't available (like when load-detection needs a * free CRTC). It should be possible to light up the connector with one * of the listed fallback modes. For default configuration userspace * should only try to light up connectors with unknown status when * there's not connector with @connector_status_connected. */ connector_status_unknown = 3, }; /** * enum drm_connector_registration_status - userspace registration status for * a &drm_connector * * This enum is used to track the status of initializing a connector and * registering it with userspace, so that DRM can prevent bogus modesets on * connectors that no longer exist. */ enum drm_connector_registration_state { /** * @DRM_CONNECTOR_INITIALIZING: The connector has just been created, * but has yet to be exposed to userspace. There should be no * additional restrictions to how the state of this connector may be * modified. */ DRM_CONNECTOR_INITIALIZING = 0, /** * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized * and registered with sysfs, as such it has been exposed to * userspace. There should be no additional restrictions to how the * state of this connector may be modified. */ DRM_CONNECTOR_REGISTERED = 1, /** * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed * to userspace and has since been unregistered and removed from * userspace, or the connector was unregistered before it had a chance * to be exposed to userspace (e.g. still in the * @DRM_CONNECTOR_INITIALIZING state). When a connector is * unregistered, there are additional restrictions to how its state * may be modified: * * - An unregistered connector may only have its DPMS changed from * On->Off. Once DPMS is changed to Off, it may not be switched back * to On. * - Modesets are not allowed on unregistered connectors, unless they * would result in disabling its assigned CRTCs. This means * disabling a CRTC on an unregistered connector is OK, but enabling * one is not. * - Removing a CRTC from an unregistered connector is OK, but new * CRTCs may never be assigned to an unregistered connector. */ DRM_CONNECTOR_UNREGISTERED = 2, }; enum subpixel_order { SubPixelUnknown = 0, SubPixelHorizontalRGB, SubPixelHorizontalBGR, SubPixelVerticalRGB, SubPixelVerticalBGR, SubPixelNone, }; /** * struct drm_scrambling: sink's scrambling support. */ struct drm_scrambling { /** * @supported: scrambling supported for rates > 340 Mhz. */ bool supported; /** * @low_rates: scrambling supported for rates <= 340 Mhz. */ bool low_rates; }; /* * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink * * Provides SCDC register support and capabilities related information on a * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0. */ struct drm_scdc { /** * @supported: status control & data channel present. */ bool supported; /** * @read_request: sink is capable of generating scdc read request. */ bool read_request; /** * @scrambling: sink's scrambling capabilities */ struct drm_scrambling scrambling; }; /** * struct drm_hdmi_info - runtime information about the connected HDMI sink * * Describes if a given display supports advanced HDMI 2.0 features. * This information is available in CEA-861-F extension blocks (like HF-VSDB). */ struct drm_hdmi_info { /** @scdc: sink's scdc support and capabilities */ struct drm_scdc scdc; /** * @y420_vdb_modes: bitmap of modes which can support ycbcr420 * output only (not normal RGB/YCBCR444/422 outputs). There are total * 107 VICs defined by CEA-861-F spec, so the size is 128 bits to map * upto 128 VICs; */ unsigned long y420_vdb_modes[BITS_TO_LONGS(128)]; /** * @y420_cmdb_modes: bitmap of modes which can support ycbcr420 * output also, along with normal HDMI outputs. There are total 107 * VICs defined by CEA-861-F spec, so the size is 128 bits to map upto * 128 VICs; */ unsigned long y420_cmdb_modes[BITS_TO_LONGS(128)]; /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */ u64 y420_cmdb_map; /** @y420_dc_modes: bitmap of deep color support index */ u8 y420_dc_modes; }; /** * enum drm_link_status - connector's link_status property value * * This enum is used as the connector's link status property value. * It is set to the values defined in uapi. * * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful * link training * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training * failure */ enum drm_link_status { DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD, DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD, }; /** * enum drm_panel_orientation - panel_orientation info for &drm_display_info * * This enum is used to track the (LCD) panel orientation. There are no * separate #defines for the uapi! * * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any * panel orientation information (normal * for non panels) in this case the "panel * orientation" connector prop will not be * attached. * @DRM_MODE_PANEL_ORIENTATION_NORMAL: The top side of the panel matches the * top side of the device's casing. * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the * bottom side of the device's casing, iow * the panel is mounted upside-down. * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP: The left side of the panel matches the * top side of the device's casing. * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the * top side of the device's casing. */ enum drm_panel_orientation { DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1, DRM_MODE_PANEL_ORIENTATION_NORMAL = 0, DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, DRM_MODE_PANEL_ORIENTATION_LEFT_UP, DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, }; /* * This is a consolidated colorimetry list supported by HDMI and * DP protocol standard. The respective connectors will register * a property with the subset of this list (supported by that * respective protocol). Userspace will set the colorspace through * a colorspace property which will be created and exposed to * userspace. */ /* For Default case, driver will set the colorspace */ #define DRM_MODE_COLORIMETRY_DEFAULT 0 /* CEA 861 Normal Colorimetry options */ #define DRM_MODE_COLORIMETRY_NO_DATA 0 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC 1 #define DRM_MODE_COLORIMETRY_BT709_YCC 2 /* CEA 861 Extended Colorimetry Options */ #define DRM_MODE_COLORIMETRY_XVYCC_601 3 #define DRM_MODE_COLORIMETRY_XVYCC_709 4 #define DRM_MODE_COLORIMETRY_SYCC_601 5 #define DRM_MODE_COLORIMETRY_OPYCC_601 6 #define DRM_MODE_COLORIMETRY_OPRGB 7 #define DRM_MODE_COLORIMETRY_BT2020_CYCC 8 #define DRM_MODE_COLORIMETRY_BT2020_RGB 9 #define DRM_MODE_COLORIMETRY_BT2020_YCC 10 /* Additional Colorimetry extension added as part of CTA 861.G */ #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12 /** * enum drm_bus_flags - bus_flags info for &drm_display_info * * This enum defines signal polarities and clock edge information for signals on * a bus as bitmask flags. * * The clock edge information is conveyed by two sets of symbols, * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is * used to describe a bus from the point of view of the transmitter, the * \*_DRIVE_\* flags should be used. When used from the point of view of the * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE * respectively. This simplifies code as signals are usually sampled on the * opposite edge of the driving edge. Transmitters and receivers may however * need to take other signal timings into account to convert between driving * and sample edges. * * @DRM_BUS_FLAG_DE_LOW: The Data Enable signal is active low * @DRM_BUS_FLAG_DE_HIGH: The Data Enable signal is active high * @DRM_BUS_FLAG_PIXDATA_POSEDGE: Legacy value, do not use * @DRM_BUS_FLAG_PIXDATA_NEGEDGE: Legacy value, do not use * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE: Data is driven on the rising edge of * the pixel clock * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE: Data is driven on the falling edge of * the pixel clock * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE: Data is sampled on the rising edge of * the pixel clock * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE: Data is sampled on the falling edge of * the pixel clock * @DRM_BUS_FLAG_DATA_MSB_TO_LSB: Data is transmitted MSB to LSB on the bus * @DRM_BUS_FLAG_DATA_LSB_TO_MSB: Data is transmitted LSB to MSB on the bus * @DRM_BUS_FLAG_SYNC_POSEDGE: Legacy value, do not use * @DRM_BUS_FLAG_SYNC_NEGEDGE: Legacy value, do not use * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE: Sync signals are driven on the rising * edge of the pixel clock * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE: Sync signals are driven on the falling * edge of the pixel clock * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE: Sync signals are sampled on the rising * edge of the pixel clock * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE: Sync signals are sampled on the falling * edge of the pixel clock * @DRM_BUS_FLAG_SHARP_SIGNALS: Set if the Sharp-specific signals * (SPL, CLS, PS, REV) must be used */ enum drm_bus_flags { DRM_BUS_FLAG_DE_LOW = BIT(0), DRM_BUS_FLAG_DE_HIGH = BIT(1), DRM_BUS_FLAG_PIXDATA_POSEDGE = BIT(2), DRM_BUS_FLAG_PIXDATA_NEGEDGE = BIT(3), DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE, DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE, DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE, DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE, DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4), DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5), DRM_BUS_FLAG_SYNC_POSEDGE = BIT(6), DRM_BUS_FLAG_SYNC_NEGEDGE = BIT(7), DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = DRM_BUS_FLAG_SYNC_POSEDGE, DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE, DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE, DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_POSEDGE, DRM_BUS_FLAG_SHARP_SIGNALS = BIT(8), }; /** * struct drm_display_info - runtime data about the connected sink * * Describes a given display (e.g. CRT or flat panel) and its limitations. For * fixed display sinks like built-in panels there's not much difference between * this and &struct drm_connector. But for sinks with a real cable this * structure is meant to describe all the things at the other end of the cable. * * For sinks which provide an EDID this can be filled out by calling * drm_add_edid_modes(). */ struct drm_display_info { /** * @width_mm: Physical width in mm. */ unsigned int width_mm; /** * @height_mm: Physical height in mm. */ unsigned int height_mm; /** * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs. */ unsigned int bpc; /** * @subpixel_order: Subpixel order of LCD panels. */ enum subpixel_order subpixel_order; #define DRM_COLOR_FORMAT_RGB444 (1<<0) #define DRM_COLOR_FORMAT_YCRCB444 (1<<1) #define DRM_COLOR_FORMAT_YCRCB422 (1<<2) #define DRM_COLOR_FORMAT_YCRCB420 (1<<3) /** * @panel_orientation: Read only connector property for built-in panels, * indicating the orientation of the panel vs the device's casing. * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN. * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the * fb to compensate and gets exported as prop to userspace. */ int panel_orientation; /** * @color_formats: HDMI Color formats, selects between RGB and YCrCb * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones * as used to describe the pixel format in framebuffers, and also don't * match the formats in @bus_formats which are shared with v4l. */ u32 color_formats; /** * @bus_formats: Pixel data format on the wire, somewhat redundant with * @color_formats. Array of size @num_bus_formats encoded using * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers. */ const u32 *bus_formats; /** * @num_bus_formats: Size of @bus_formats array. */ unsigned int num_bus_formats; /** * @bus_flags: Additional information (like pixel signal polarity) for * the pixel data on the bus, using &enum drm_bus_flags values * DRM_BUS_FLAGS\_. */ u32 bus_flags; /** * @max_tmds_clock: Maximum TMDS clock rate supported by the * sink in kHz. 0 means undefined. */ int max_tmds_clock; /** * @dvi_dual: Dual-link DVI sink? */ bool dvi_dual; /** * @has_hdmi_infoframe: Does the sink support the HDMI infoframe? */ bool has_hdmi_infoframe; /** * @rgb_quant_range_selectable: Does the sink support selecting * the RGB quantization range? */ bool rgb_quant_range_selectable; /** * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even * more stuff redundant with @bus_formats. */ u8 edid_hdmi_dc_modes; /** * @cea_rev: CEA revision of the HDMI sink. */ u8 cea_rev; /** * @hdmi: advance features of a HDMI sink. */ struct drm_hdmi_info hdmi; /** * @non_desktop: Non desktop display (HMD). */ bool non_desktop; }; int drm_display_info_set_bus_formats(struct drm_display_info *info, const u32 *formats, unsigned int num_formats); /** * struct drm_connector_tv_margins - TV connector related margins * * Describes the margins in pixels to put around the image on TV * connectors to deal with overscan. */ struct drm_connector_tv_margins { /** * @bottom: Bottom margin in pixels. */ unsigned int bottom; /** * @left: Left margin in pixels. */ unsigned int left; /** * @right: Right margin in pixels. */ unsigned int right; /** * @top: Top margin in pixels. */ unsigned int top; }; /** * struct drm_tv_connector_state - TV connector related states * @subconnector: selected subconnector * @margins: TV margins * @mode: TV mode * @brightness: brightness in percent * @contrast: contrast in percent * @flicker_reduction: flicker reduction in percent * @overscan: overscan in percent * @saturation: saturation in percent * @hue: hue in percent */ struct drm_tv_connector_state { enum drm_mode_subconnector subconnector; struct drm_connector_tv_margins margins; unsigned int mode; unsigned int brightness; unsigned int contrast; unsigned int flicker_reduction; unsigned int overscan; unsigned int saturation; unsigned int hue; }; /** * struct drm_connector_state - mutable connector state */ struct drm_connector_state { /** @connector: backpointer to the connector */ struct drm_connector *connector; /** * @crtc: CRTC to connect connector to, NULL if disabled. * * Do not change this directly, use drm_atomic_set_crtc_for_connector() * instead. */ struct drm_crtc *crtc; /** * @best_encoder: * * Used by the atomic helpers to select the encoder, through the * &drm_connector_helper_funcs.atomic_best_encoder or * &drm_connector_helper_funcs.best_encoder callbacks. * * This is also used in the atomic helpers to map encoders to their * current and previous connectors, see * drm_atomic_get_old_connector_for_encoder() and * drm_atomic_get_new_connector_for_encoder(). * * NOTE: Atomic drivers must fill this out (either themselves or through * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will * not return correct data to userspace. */ struct drm_encoder *best_encoder; /** * @link_status: Connector link_status to keep track of whether link is * GOOD or BAD to notify userspace if retraining is necessary. */ enum drm_link_status link_status; /** @state: backpointer to global drm_atomic_state */ struct drm_atomic_state *state; /** * @commit: Tracks the pending commit to prevent use-after-free conditions. * * Is only set when @crtc is NULL. */ struct drm_crtc_commit *commit; /** @tv: TV connector state */ struct drm_tv_connector_state tv; /** * @self_refresh_aware: * * This tracks whether a connector is aware of the self refresh state. * It should be set to true for those connector implementations which * understand the self refresh state. This is needed since the crtc * registers the self refresh helpers and it doesn't know if the * connectors downstream have implemented self refresh entry/exit. * * Drivers should set this to true in atomic_check if they know how to * handle self_refresh requests. */ bool self_refresh_aware; /** * @picture_aspect_ratio: Connector property to control the * HDMI infoframe aspect ratio setting. * * The %DRM_MODE_PICTURE_ASPECT_\* values much match the * values for &enum hdmi_picture_aspect */ enum hdmi_picture_aspect picture_aspect_ratio; /** * @content_type: Connector property to control the * HDMI infoframe content type setting. * The %DRM_MODE_CONTENT_TYPE_\* values much * match the values. */ unsigned int content_type; /** * @hdcp_content_type: Connector property to pass the type of * protected content. This is most commonly used for HDCP. */ unsigned int hdcp_content_type; /** * @scaling_mode: Connector property to control the * upscaling, mostly used for built-in panels. */ unsigned int scaling_mode; /** * @content_protection: Connector property to request content * protection. This is most commonly used for HDCP. */ unsigned int content_protection; /** * @colorspace: State variable for Connector property to request * colorspace change on Sink. This is most commonly used to switch * to wider color gamuts like BT2020. */ u32 colorspace; /** * @writeback_job: Writeback job for writeback connectors * * Holds the framebuffer and out-fence for a writeback connector. As * the writeback completion may be asynchronous to the normal commit * cycle, the writeback job lifetime is managed separately from the * normal atomic state by this object. * * See also: drm_writeback_queue_job() and * drm_writeback_signal_completion() */ struct drm_writeback_job *writeback_job; /** * @max_requested_bpc: Connector property to limit the maximum bit * depth of the pixels. */ u8 max_requested_bpc; /** * @max_bpc: Connector max_bpc based on the requested max_bpc property * and the connector bpc limitations obtained from edid. */ u8 max_bpc; /** * @hdr_output_metadata: * DRM blob property for HDR output metadata */ struct drm_property_blob *hdr_output_metadata; }; /** * struct drm_connector_funcs - control connectors on a given device * * Each CRTC may have one or more connectors attached to it. The functions * below allow the core DRM code to control connectors, enumerate available modes, * etc. */ struct drm_connector_funcs { /** * @dpms: * * Legacy entry point to set the per-connector DPMS state. Legacy DPMS * is exposed as a standard property on the connector, but diverted to * this callback in the drm core. Note that atomic drivers don't * implement the 4 level DPMS support on the connector any more, but * instead only have an on/off "ACTIVE" property on the CRTC object. * * This hook is not used by atomic drivers, remapping of the legacy DPMS * property is entirely handled in the DRM core. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*dpms)(struct drm_connector *connector, int mode); /** * @reset: * * Reset connector hardware and software state to off. This function isn't * called by the core directly, only through drm_mode_config_reset(). * It's not a helper hook only for historical reasons. * * Atomic drivers can use drm_atomic_helper_connector_reset() to reset * atomic state using this hook. */ void (*reset)(struct drm_connector *connector); /** * @detect: * * Check to see if anything is attached to the connector. The parameter * force is set to false whilst polling, true when checking the * connector due to a user request. force can be used by the driver to * avoid expensive, destructive operations during automated probing. * * This callback is optional, if not implemented the connector will be * considered as always being attached. * * FIXME: * * Note that this hook is only called by the probe helper. It's not in * the helper library vtable purely for historical reasons. The only DRM * core entry point to probe connector state is @fill_modes. * * Note that the helper library will already hold * &drm_mode_config.connection_mutex. Drivers which need to grab additional * locks to avoid races with concurrent modeset changes need to use * &drm_connector_helper_funcs.detect_ctx instead. * * RETURNS: * * drm_connector_status indicating the connector's status. */ enum drm_connector_status (*detect)(struct drm_connector *connector, bool force); /** * @force: * * This function is called to update internal encoder state when the * connector is forced to a certain state by userspace, either through * the sysfs interfaces or on the kernel cmdline. In that case the * @detect callback isn't called. * * FIXME: * * Note that this hook is only called by the probe helper. It's not in * the helper library vtable purely for historical reasons. The only DRM * core entry point to probe connector state is @fill_modes. */ void (*force)(struct drm_connector *connector); /** * @fill_modes: * * Entry point for output detection and basic mode validation. The * driver should reprobe the output if needed (e.g. when hotplug * handling is unreliable), add all detected modes to &drm_connector.modes * and filter out any the device can't support in any configuration. It * also needs to filter out any modes wider or higher than the * parameters max_width and max_height indicate. * * The drivers must also prune any modes no longer valid from * &drm_connector.modes. Furthermore it must update * &drm_connector.status and &drm_connector.edid. If no EDID has been * received for this output connector->edid must be NULL. * * Drivers using the probe helpers should use * drm_helper_probe_single_connector_modes() to implement this * function. * * RETURNS: * * The number of modes detected and filled into &drm_connector.modes. */ int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height); /** * @set_property: * * This is the legacy entry point to update a property attached to the * connector. * * This callback is optional if the driver does not support any legacy * driver-private properties. For atomic drivers it is not used because * property handling is done entirely in the DRM core. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*set_property)(struct drm_connector *connector, struct drm_property *property, uint64_t val); /** * @late_register: * * This optional hook can be used to register additional userspace * interfaces attached to the connector, light backlight control, i2c, * DP aux or similar interfaces. It is called late in the driver load * sequence from drm_connector_register() when registering all the * core drm connector interfaces. Everything added from this callback * should be unregistered in the early_unregister callback. * * This is called while holding &drm_connector.mutex. * * Returns: * * 0 on success, or a negative error code on failure. */ int (*late_register)(struct drm_connector *connector); /** * @early_unregister: * * This optional hook should be used to unregister the additional * userspace interfaces attached to the connector from * late_register(). It is called from drm_connector_unregister(), * early in the driver unload sequence to disable userspace access * before data structures are torndown. * * This is called while holding &drm_connector.mutex. */ void (*early_unregister)(struct drm_connector *connector); /** * @destroy: * * Clean up connector resources. This is called at driver unload time * through drm_mode_config_cleanup(). It can also be called at runtime * when a connector is being hot-unplugged for drivers that support * connector hotplugging (e.g. DisplayPort MST). */ void (*destroy)(struct drm_connector *connector); /** * @atomic_duplicate_state: * * Duplicate the current atomic state for this connector and return it. * The core and helpers guarantee that any atomic state duplicated with * this hook and still owned by the caller (i.e. not transferred to the * driver by calling &drm_mode_config_funcs.atomic_commit) will be * cleaned up by calling the @atomic_destroy_state hook in this * structure. * * This callback is mandatory for atomic drivers. * * Atomic drivers which don't subclass &struct drm_connector_state should use * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is * duplicated in a consistent fashion across drivers. * * It is an error to call this hook before &drm_connector.state has been * initialized correctly. * * NOTE: * * If the duplicate state references refcounted resources this hook must * acquire a reference for each of them. The driver must release these * references again in @atomic_destroy_state. * * RETURNS: * * Duplicated atomic state or NULL when the allocation failed. */ struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector); /** * @atomic_destroy_state: * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references * * This callback is mandatory for atomic drivers. */ void (*atomic_destroy_state)(struct drm_connector *connector, struct drm_connector_state *state); /** * @atomic_set_property: * * Decode a driver-private property value and store the decoded value * into the passed-in state structure. Since the atomic core decodes all * standardized properties (even for extensions beyond the core set of * properties which might not be implemented by all drivers) this * requires drivers to subclass the state structure. * * Such driver-private properties should really only be implemented for * truly hardware/vendor specific state. Instead it is preferred to * standardize atomic extension and decode the properties used to expose * such an extension in the core. * * Do not call this function directly, use * drm_atomic_connector_set_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * NOTE: * * This function is called in the state assembly phase of atomic * modesets, which can be aborted for any reason (including on * userspace's request to just check whether a configuration would be * possible). Drivers MUST NOT touch any persistent state (hardware or * software) or data structures except the passed in @state parameter. * * Also since userspace controls in which order properties are set this * function must not do any input validation (since the state update is * incomplete and hence likely inconsistent). Instead any such input * validation must be done in the various atomic_check callbacks. * * RETURNS: * * 0 if the property has been found, -EINVAL if the property isn't * implemented by the driver (which shouldn't ever happen, the core only * asks for properties attached to this connector). No other validation * is allowed by the driver. The core already checks that the property * value is within the range (integer, valid enum value, ...) the driver * set when registering the property. */ int (*atomic_set_property)(struct drm_connector *connector, struct drm_connector_state *state, struct drm_property *property, uint64_t val); /** * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to * implement the GETCONNECTOR IOCTL. * * Do not call this function directly, use * drm_atomic_connector_get_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * RETURNS: * * 0 on success, -EINVAL if the property isn't implemented by the * driver (which shouldn't ever happen, the core only asks for * properties attached to this connector). */ int (*atomic_get_property)(struct drm_connector *connector, const struct drm_connector_state *state, struct drm_property *property, uint64_t *val); /** * @atomic_print_state: * * If driver subclasses &struct drm_connector_state, it should implement * this optional hook for printing additional driver specific state. * * Do not call this directly, use drm_atomic_connector_print_state() * instead. */ void (*atomic_print_state)(struct drm_printer *p, const struct drm_connector_state *state); }; /** * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line * * Each connector can have an initial mode with additional options * passed through the kernel command line. This structure allows to * express those parameters and will be filled by the command-line * parser. */ struct drm_cmdline_mode { /** * @name: * * Name of the mode. */ char name[DRM_DISPLAY_MODE_LEN]; /** * @specified: * * Has a mode been read from the command-line? */ bool specified; /** * @refresh_specified: * * Did the mode have a preferred refresh rate? */ bool refresh_specified; /** * @bpp_specified: * * Did the mode have a preferred BPP? */ bool bpp_specified; /** * @xres: * * Active resolution on the X axis, in pixels. */ int xres; /** * @yres: * * Active resolution on the Y axis, in pixels. */ int yres; /** * @bpp: * * Bits per pixels for the mode. */ int bpp; /** * @refresh: * * Refresh rate, in Hertz. */ int refresh; /** * @rb: * * Do we need to use reduced blanking? */ bool rb; /** * @interlace: * * The mode is interlaced. */ bool interlace; /** * @cvt: * * The timings will be calculated using the VESA Coordinated * Video Timings instead of looking up the mode from a table. */ bool cvt; /** * @margins: * * Add margins to the mode calculation (1.8% of xres rounded * down to 8 pixels and 1.8% of yres). */ bool margins; /** * @force: * * Ignore the hotplug state of the connector, and force its * state to one of the DRM_FORCE_* values. */ enum drm_connector_force force; /** * @rotation_reflection: * * Initial rotation and reflection of the mode setup from the * command line. See DRM_MODE_ROTATE_* and * DRM_MODE_REFLECT_*. The only rotations supported are * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180. */ unsigned int rotation_reflection; /** * @tv_margins: TV margins to apply to the mode. */ struct drm_connector_tv_margins tv_margins; }; /** * struct drm_connector - central DRM connector control structure * * Each connector may be connected to one or more CRTCs, or may be clonable by * another connector if they can share a CRTC. Each connector also has a specific * position in the broader display (referred to as a 'screen' though it could * span multiple monitors). */ struct drm_connector { /** @dev: parent DRM device */ struct drm_device *dev; /** @kdev: kernel device for sysfs attributes */ struct device *kdev; /** @attr: sysfs attributes */ struct device_attribute *attr; /** * @head: * * List of all connectors on a @dev, linked from * &drm_mode_config.connector_list. Protected by * &drm_mode_config.connector_list_lock, but please only use * &drm_connector_list_iter to walk this list. */ struct list_head head; /** @base: base KMS object */ struct drm_mode_object base; /** @name: human readable name, can be overwritten by the driver */ char *name; /** * @mutex: Lock for general connector state, but currently only protects * @registered. Most of the connector state is still protected by * &drm_mode_config.mutex. */ struct mutex mutex; /** * @index: Compacted connector index, which matches the position inside * the mode_config.list for drivers not supporting hot-add/removing. Can * be used as an array index. It is invariant over the lifetime of the * connector. */ unsigned index; /** * @connector_type: * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h */ int connector_type; /** @connector_type_id: index into connector type enum */ int connector_type_id; /** * @interlace_allowed: * Can this connector handle interlaced modes? Only used by * drm_helper_probe_single_connector_modes() for mode filtering. */ bool interlace_allowed; /** * @doublescan_allowed: * Can this connector handle doublescan? Only used by * drm_helper_probe_single_connector_modes() for mode filtering. */ bool doublescan_allowed; /** * @stereo_allowed: * Can this connector handle stereo modes? Only used by * drm_helper_probe_single_connector_modes() for mode filtering. */ bool stereo_allowed; /** * @ycbcr_420_allowed : This bool indicates if this connector is * capable of handling YCBCR 420 output. While parsing the EDID * blocks it's very helpful to know if the source is capable of * handling YCBCR 420 outputs. */ bool ycbcr_420_allowed; /** * @registration_state: Is this connector initializing, exposed * (registered) with userspace, or unregistered? * * Protected by @mutex. */ enum drm_connector_registration_state registration_state; /** * @modes: * Modes available on this connector (from fill_modes() + user). * Protected by &drm_mode_config.mutex. */ struct list_head modes; /** * @status: * One of the drm_connector_status enums (connected, not, or unknown). * Protected by &drm_mode_config.mutex. */ enum drm_connector_status status; /** * @probed_modes: * These are modes added by probing with DDC or the BIOS, before * filtering is applied. Used by the probe helpers. Protected by * &drm_mode_config.mutex. */ struct list_head probed_modes; /** * @display_info: Display information is filled from EDID information * when a display is detected. For non hot-pluggable displays such as * flat panels in embedded systems, the driver should initialize the * &drm_display_info.width_mm and &drm_display_info.height_mm fields * with the physical size of the display. * * Protected by &drm_mode_config.mutex. */ struct drm_display_info display_info; /** @funcs: connector control functions */ const struct drm_connector_funcs *funcs; /** * @edid_blob_ptr: DRM property containing EDID if present. Protected by * &drm_mode_config.mutex. This should be updated only by calling * drm_connector_update_edid_property(). */ struct drm_property_blob *edid_blob_ptr; /** @properties: property tracking for this connector */ struct drm_object_properties properties; /** * @scaling_mode_property: Optional atomic property to control the * upscaling. See drm_connector_attach_content_protection_property(). */ struct drm_property *scaling_mode_property; /** * @vrr_capable_property: Optional property to help userspace * query hardware support for variable refresh rate on a connector. * connector. Drivers can add the property to a connector by * calling drm_connector_attach_vrr_capable_property(). * * This should be updated only by calling * drm_connector_set_vrr_capable_property(). */ struct drm_property *vrr_capable_property; /** * @colorspace_property: Connector property to set the suitable * colorspace supported by the sink. */ struct drm_property *colorspace_property; /** * @path_blob_ptr: * * DRM blob property data for the DP MST path property. This should only * be updated by calling drm_connector_set_path_property(). */ struct drm_property_blob *path_blob_ptr; /** * @max_bpc_property: Default connector property for the max bpc to be * driven out of the connector. */ struct drm_property *max_bpc_property; #define DRM_CONNECTOR_POLL_HPD (1 << 0) #define DRM_CONNECTOR_POLL_CONNECT (1 << 1) #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2) /** * @polled: * * Connector polling mode, a combination of * * DRM_CONNECTOR_POLL_HPD * The connector generates hotplug events and doesn't need to be * periodically polled. The CONNECT and DISCONNECT flags must not * be set together with the HPD flag. * * DRM_CONNECTOR_POLL_CONNECT * Periodically poll the connector for connection. * * DRM_CONNECTOR_POLL_DISCONNECT * Periodically poll the connector for disconnection, without * causing flickering even when the connector is in use. DACs should * rarely do this without a lot of testing. * * Set to 0 for connectors that don't support connection status * discovery. */ uint8_t polled; /** * @dpms: Current dpms state. For legacy drivers the * &drm_connector_funcs.dpms callback must update this. For atomic * drivers, this is handled by the core atomic code, and drivers must * only take &drm_crtc_state.active into account. */ int dpms; /** @helper_private: mid-layer private data */ const struct drm_connector_helper_funcs *helper_private; /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */ struct drm_cmdline_mode cmdline_mode; /** @force: a DRM_FORCE_<foo> state for forced mode sets */ enum drm_connector_force force; /** @override_edid: has the EDID been overwritten through debugfs for testing? */ bool override_edid; #define DRM_CONNECTOR_MAX_ENCODER 3 /** * @encoder_ids: Valid encoders for this connector. Please only use * drm_connector_for_each_possible_encoder() to enumerate these. */ uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER]; /** * @encoder: Currently bound encoder driving this connector, if any. * Only really meaningful for non-atomic drivers. Atomic drivers should * instead look at &drm_connector_state.best_encoder, and in case they * need the CRTC driving this output, &drm_connector_state.crtc. */ struct drm_encoder *encoder; #define MAX_ELD_BYTES 128 /** @eld: EDID-like data, if present */ uint8_t eld[MAX_ELD_BYTES]; /** @latency_present: AV delay info from ELD, if found */ bool latency_present[2]; /** * @video_latency: Video latency info from ELD, if found. * [0]: progressive, [1]: interlaced */ int video_latency[2]; /** * @audio_latency: audio latency info from ELD, if found * [0]: progressive, [1]: interlaced */ int audio_latency[2]; /** * @ddc: associated ddc adapter. * A connector usually has its associated ddc adapter. If a driver uses * this field, then an appropriate symbolic link is created in connector * sysfs directory to make it easy for the user to tell which i2c * adapter is for a particular display. * * The field should be set by calling drm_connector_init_with_ddc(). */ struct i2c_adapter *ddc; /** * @null_edid_counter: track sinks that give us all zeros for the EDID. * Needed to workaround some HW bugs where we get all 0s */ int null_edid_counter; /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */ unsigned bad_edid_counter; /** * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used * in Displayport compliance testing - Displayport Link CTS Core 1.2 * rev1.1 4.2.2.6 */ bool edid_corrupt; /** @debugfs_entry: debugfs directory for this connector */ struct dentry *debugfs_entry; /** * @state: * * Current atomic state for this connector. * * This is protected by &drm_mode_config.connection_mutex. Note that * nonblocking atomic commits access the current connector state without * taking locks. Either by going through the &struct drm_atomic_state * pointers, see for_each_oldnew_connector_in_state(), * for_each_old_connector_in_state() and * for_each_new_connector_in_state(). Or through careful ordering of * atomic commit operations as implemented in the atomic helpers, see * &struct drm_crtc_commit. */ struct drm_connector_state *state; /* DisplayID bits. FIXME: Extract into a substruct? */ /** * @tile_blob_ptr: * * DRM blob property data for the tile property (used mostly by DP MST). * This is meant for screens which are driven through separate display * pipelines represented by &drm_crtc, which might not be running with * genlocked clocks. For tiled panels which are genlocked, like * dual-link LVDS or dual-link DSI, the driver should try to not expose * the tiling and virtualize both &drm_crtc and &drm_plane if needed. * * This should only be updated by calling * drm_connector_set_tile_property(). */ struct drm_property_blob *tile_blob_ptr; /** @has_tile: is this connector connected to a tiled monitor */ bool has_tile; /** @tile_group: tile group for the connected monitor */ struct drm_tile_group *tile_group; /** @tile_is_single_monitor: whether the tile is one monitor housing */ bool tile_is_single_monitor; /** @num_h_tile: number of horizontal tiles in the tile group */ /** @num_v_tile: number of vertical tiles in the tile group */ uint8_t num_h_tile, num_v_tile; /** @tile_h_loc: horizontal location of this tile */ /** @tile_v_loc: vertical location of this tile */ uint8_t tile_h_loc, tile_v_loc; /** @tile_h_size: horizontal size of this tile. */ /** @tile_v_size: vertical size of this tile. */ uint16_t tile_h_size, tile_v_size; /** * @free_node: * * List used only by &drm_connector_list_iter to be able to clean up a * connector from any context, in conjunction with * &drm_mode_config.connector_free_work. */ struct llist_node free_node; /** @hdr_sink_metadata: HDR Metadata Information read from sink */ struct hdr_sink_metadata hdr_sink_metadata; }; #define obj_to_connector(x) container_of(x, struct drm_connector, base) int drm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type); int drm_connector_init_with_ddc(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type, struct i2c_adapter *ddc); void drm_connector_attach_edid_property(struct drm_connector *connector); int drm_connector_register(struct drm_connector *connector); void drm_connector_unregister(struct drm_connector *connector); int drm_connector_attach_encoder(struct drm_connector *connector, struct drm_encoder *encoder); void drm_connector_cleanup(struct drm_connector *connector); static inline unsigned int drm_connector_index(const struct drm_connector *connector) { return connector->index; } static inline u32 drm_connector_mask(const struct drm_connector *connector) { return 1 << connector->index; } /** * drm_connector_lookup - lookup connector object * @dev: DRM device * @file_priv: drm file to check for lease against. * @id: connector object id * * This function looks up the connector object specified by id * add takes a reference to it. */ static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev, struct drm_file *file_priv, uint32_t id) { struct drm_mode_object *mo; mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR); return mo ? obj_to_connector(mo) : NULL; } /** * drm_connector_get - acquire a connector reference * @connector: DRM connector * * This function increments the connector's refcount. */ static inline void drm_connector_get(struct drm_connector *connector) { drm_mode_object_get(&connector->base); } /** * drm_connector_put - release a connector reference * @connector: DRM connector * * This function decrements the connector's reference count and frees the * object if the reference count drops to zero. */ static inline void drm_connector_put(struct drm_connector *connector) { drm_mode_object_put(&connector->base); } /** * drm_connector_is_unregistered - has the connector been unregistered from * userspace? * @connector: DRM connector * * Checks whether or not @connector has been unregistered from userspace. * * Returns: * True if the connector was unregistered, false if the connector is * registered or has not yet been registered with userspace. */ static inline bool drm_connector_is_unregistered(struct drm_connector *connector) { return READ_ONCE(connector->registration_state) == DRM_CONNECTOR_UNREGISTERED; } const char *drm_get_connector_status_name(enum drm_connector_status status); const char *drm_get_subpixel_order_name(enum subpixel_order order); const char *drm_get_dpms_name(int val); const char *drm_get_dvi_i_subconnector_name(int val); const char *drm_get_dvi_i_select_name(int val); const char *drm_get_tv_subconnector_name(int val); const char *drm_get_tv_select_name(int val); const char *drm_get_content_protection_name(int val); const char *drm_get_hdcp_content_type_name(int val); int drm_mode_create_dvi_i_properties(struct drm_device *dev); int drm_mode_create_tv_margin_properties(struct drm_device *dev); int drm_mode_create_tv_properties(struct drm_device *dev, unsigned int num_modes, const char * const modes[]); void drm_connector_attach_tv_margin_properties(struct drm_connector *conn); int drm_mode_create_scaling_mode_property(struct drm_device *dev); int drm_connector_attach_content_type_property(struct drm_connector *dev); int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, u32 scaling_mode_mask); int drm_connector_attach_vrr_capable_property( struct drm_connector *connector); int drm_mode_create_aspect_ratio_property(struct drm_device *dev); int drm_mode_create_colorspace_property(struct drm_connector *connector); int drm_mode_create_content_type_property(struct drm_device *dev); void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, const struct drm_connector_state *conn_state); int drm_mode_create_suggested_offset_properties(struct drm_device *dev); int drm_connector_set_path_property(struct drm_connector *connector, const char *path); int drm_connector_set_tile_property(struct drm_connector *connector); int drm_connector_update_edid_property(struct drm_connector *connector, const struct edid *edid); void drm_connector_set_link_status_property(struct drm_connector *connector, uint64_t link_status); void drm_connector_set_vrr_capable_property( struct drm_connector *connector, bool capable); int drm_connector_init_panel_orientation_property( struct drm_connector *connector, int width, int height); int drm_connector_attach_max_bpc_property(struct drm_connector *connector, int min, int max); /** * struct drm_tile_group - Tile group metadata * @refcount: reference count * @dev: DRM device * @id: tile group id exposed to userspace * @group_data: Sink-private data identifying this group * * @group_data corresponds to displayid vend/prod/serial for external screens * with an EDID. */ struct drm_tile_group { struct kref refcount; struct drm_device *dev; int id; u8 group_data[8]; }; struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, char topology[8]); struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, char topology[8]); void drm_mode_put_tile_group(struct drm_device *dev, struct drm_tile_group *tg); /** * struct drm_connector_list_iter - connector_list iterator * * This iterator tracks state needed to be able to walk the connector_list * within struct drm_mode_config. Only use together with * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and * drm_connector_list_iter_next() respectively the convenience macro * drm_for_each_connector_iter(). */ struct drm_connector_list_iter { /* private: */ struct drm_device *dev; struct drm_connector *conn; }; void drm_connector_list_iter_begin(struct drm_device *dev, struct drm_connector_list_iter *iter); struct drm_connector * drm_connector_list_iter_next(struct drm_connector_list_iter *iter); void drm_connector_list_iter_end(struct drm_connector_list_iter *iter); bool drm_connector_has_possible_encoder(struct drm_connector *connector, struct drm_encoder *encoder); /** * drm_for_each_connector_iter - connector_list iterator macro * @connector: &struct drm_connector pointer used as cursor * @iter: &struct drm_connector_list_iter * * Note that @connector is only valid within the list body, if you want to use * @connector after calling drm_connector_list_iter_end() then you need to grab * your own reference first using drm_connector_get(). */ #define drm_for_each_connector_iter(connector, iter) \ while ((connector = drm_connector_list_iter_next(iter))) /** * drm_connector_for_each_possible_encoder - iterate connector's possible encoders * @connector: &struct drm_connector pointer * @encoder: &struct drm_encoder pointer used as cursor * @__i: int iteration cursor, for macro-internal use */ #define drm_connector_for_each_possible_encoder(connector, encoder, __i) \ for ((__i) = 0; (__i) < ARRAY_SIZE((connector)->encoder_ids) && \ (connector)->encoder_ids[(__i)] != 0; (__i)++) \ for_each_if((encoder) = \ drm_encoder_find((connector)->dev, NULL, \ (connector)->encoder_ids[(__i)])) \ #endif