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/*
* 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/ctype.h>
#include <drm/drm_mode_object.h>
#include <uapi/drm/drm_mode.h>
struct drm_device;
struct drm_connector_helper_funcs;
struct drm_device;
struct drm_crtc;
struct drm_encoder;
struct drm_property;
struct drm_property_blob;
struct drm_printer;
struct edid;
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 subpixel_order {
SubPixelUnknown = 0,
SubPixelHorizontalRGB,
SubPixelHorizontalBGR,
SubPixelVerticalRGB,
SubPixelVerticalBGR,
SubPixelNone,
};
/**
* 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 {
/**
* @name: Name of the display.
*/
char name[DRM_DISPLAY_INFO_LEN];
/**
* @width_mm: Physical width in mm.
*/
unsigned int width_mm;
/**
* @height_mm: Physical height in mm.
*/
unsigned int height_mm;
/**
* @pixel_clock: Maximum pixel clock supported by the sink, in units of
* 100Hz. This mismatches the clok in &drm_display_mode (which is in
* kHZ), because that's what the EDID uses as base unit.
*/
unsigned int pixel_clock;
/**
* @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)
/**
* @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;
#define DRM_BUS_FLAG_DE_LOW (1<<0)
#define DRM_BUS_FLAG_DE_HIGH (1<<1)
/* drive data on pos. edge */
#define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2)
/* drive data on neg. edge */
#define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
/**
* @bus_flags: Additional information (like pixel signal polarity) for
* the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
*/
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;
/**
* @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;
};
int drm_display_info_set_bus_formats(struct drm_display_info *info,
const u32 *formats,
unsigned int num_formats);
/**
* struct drm_tv_connector_state - TV connector related states
* @subconnector: selected subconnector
* @margins: left/right/top/bottom 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 {
unsigned int left;
unsigned int right;
unsigned int top;
unsigned int bottom;
} 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
* @connector: backpointer to the connector
* @best_encoder: can be used by helpers and drivers to select the encoder
* @state: backpointer to global drm_atomic_state
* @tv: TV connector state
*/
struct drm_connector_state {
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;
struct drm_encoder *best_encoder;
struct drm_atomic_state *state;
struct drm_tv_connector_state tv;
};
/**
* 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.
*
* Drivers implementing atomic modeset should use
* drm_atomic_helper_connector_dpms() to implement this hook.
*
* 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.
*
* 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 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
* connector->modes. Furthermore it must update connector->status and
* 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() or
* drm_helper_probe_single_connector_modes_nomerge() to implement this
* function.
*
* RETURNS:
*
* The number of modes detected and f
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