xref: /openbmc/linux/drivers/gpu/drm/i915/display/intel_display_limits.h (revision 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e)

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2022 Intel Corporation
 */

#ifndef __INTEL_DISPLAY_LIMITS_H__
#define __INTEL_DISPLAY_LIMITS_H__

/*
 * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the
 * rest have consecutive values and match the enum values of transcoders
 * with a 1:1 transcoder -> pipe mapping.
 */
enum pipe {
	INVALID_PIPE = -1,

	PIPE_A = 0,
	PIPE_B,
	PIPE_C,
	PIPE_D,
	_PIPE_EDP,

	I915_MAX_PIPES = _PIPE_EDP
};

enum transcoder {
	INVALID_TRANSCODER = -1,
	/*
	 * The following transcoders have a 1:1 transcoder -> pipe mapping,
	 * keep their values fixed: the code assumes that TRANSCODER_A=0, the
	 * rest have consecutive values and match the enum values of the pipes
	 * they map to.
	 */
	TRANSCODER_A = PIPE_A,
	TRANSCODER_B = PIPE_B,
	TRANSCODER_C = PIPE_C,
	TRANSCODER_D = PIPE_D,

	/*
	 * The following transcoders can map to any pipe, their enum value
	 * doesn't need to stay fixed.
	 */
	TRANSCODER_EDP,
	TRANSCODER_DSI_0,
	TRANSCODER_DSI_1,
	TRANSCODER_DSI_A = TRANSCODER_DSI_0,	/* legacy DSI */
	TRANSCODER_DSI_C = TRANSCODER_DSI_1,	/* legacy DSI */

	I915_MAX_TRANSCODERS
};

/*
 * Per-pipe plane identifier.
 * I915_MAX_PLANES in the enum below is the maximum (across all platforms)
 * number of planes per CRTC.  Not all platforms really have this many planes,
 * which means some arrays of size I915_MAX_PLANES may have unused entries
 * between the topmost sprite plane and the cursor plane.
 *
 * This is expected to be passed to various register macros
 * (eg. PLANE_CTL(), PS_PLANE_SEL(), etc.) so adjust with care.
 */
enum plane_id {
	PLANE_PRIMARY,
	PLANE_SPRITE0,
	PLANE_SPRITE1,
	PLANE_SPRITE2,
	PLANE_SPRITE3,
	PLANE_SPRITE4,
	PLANE_SPRITE5,
	PLANE_CURSOR,

	I915_MAX_PLANES,
};

enum port {
	PORT_NONE = -1,

	PORT_A = 0,
	PORT_B,
	PORT_C,
	PORT_D,
	PORT_E,
	PORT_F,
	PORT_G,
	PORT_H,
	PORT_I,

	/* tgl+ */
	PORT_TC1 = PORT_D,
	PORT_TC2,
	PORT_TC3,
	PORT_TC4,
	PORT_TC5,
	PORT_TC6,

	/* XE_LPD repositions D/E offsets and bitfields */
	PORT_D_XELPD = PORT_TC5,
	PORT_E_XELPD,

	I915_MAX_PORTS
};

enum hpd_pin {
	HPD_NONE = 0,
	HPD_TV = HPD_NONE,     /* TV is known to be unreliable */
	HPD_CRT,
	HPD_SDVO_B,
	HPD_SDVO_C,
	HPD_PORT_A,
	HPD_PORT_B,
	HPD_PORT_C,
	HPD_PORT_D,
	HPD_PORT_E,
	HPD_PORT_TC1,
	HPD_PORT_TC2,
	HPD_PORT_TC3,
	HPD_PORT_TC4,
	HPD_PORT_TC5,
	HPD_PORT_TC6,

	HPD_NUM_PINS
};

#endif /* __INTEL_DISPLAY_LIMITS_H__ */