drivers/gpu/drm/amd/display/include/signal_types.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/include/signal_types.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/include/signal_types.h
Extension
.h
Size
5049 bytes
Lines
179
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __DC_SIGNAL_TYPES_H__
#define __DC_SIGNAL_TYPES_H__

/* Minimum pixel clock, in KHz. For TMDS signal is 25.00 MHz */
#define TMDS_MIN_PIXEL_CLOCK 25000
/* Maximum pixel clock, in KHz. For TMDS signal is 165.00 MHz */
#define TMDS_MAX_PIXEL_CLOCK 165000
/* Maximum pixel clock, in KHz. For HDMI2 TMDS signal is 600 MHz */
#define HDMI2_TMDS_MAX_PIXEL_CLOCK 600000

enum signal_type {
	SIGNAL_TYPE_NONE		= 0L,		/* no signal */
	SIGNAL_TYPE_DVI_SINGLE_LINK	= (1 << 0),
	SIGNAL_TYPE_DVI_DUAL_LINK	= (1 << 1),
	SIGNAL_TYPE_HDMI_TYPE_A		= (1 << 2),
	SIGNAL_TYPE_LVDS		= (1 << 3),
	SIGNAL_TYPE_RGB			= (1 << 4),
	SIGNAL_TYPE_DISPLAY_PORT	= (1 << 5),
	SIGNAL_TYPE_DISPLAY_PORT_MST	= (1 << 6),
	SIGNAL_TYPE_EDP			= (1 << 7),
	SIGNAL_TYPE_HDMI_FRL		= (1 << 8),
	SIGNAL_TYPE_VIRTUAL		= (1 << 9),	/* Virtual Display */
};

static inline const char *signal_type_to_string(const int type)
{
	switch (type) {
	case SIGNAL_TYPE_NONE:
		return "No signal";
	case SIGNAL_TYPE_DVI_SINGLE_LINK:
		return "DVI: Single Link";
	case SIGNAL_TYPE_DVI_DUAL_LINK:
		return "DVI: Dual Link";
	case SIGNAL_TYPE_HDMI_TYPE_A:
		return "HDMI: TYPE A";
	case SIGNAL_TYPE_LVDS:
		return "LVDS";
	case SIGNAL_TYPE_RGB:
		return "RGB";
	case SIGNAL_TYPE_DISPLAY_PORT:
		return "Display Port";
	case SIGNAL_TYPE_DISPLAY_PORT_MST:
		return "Display Port: MST";
	case SIGNAL_TYPE_EDP:
		return "Embedded Display Port";
	case SIGNAL_TYPE_HDMI_FRL:
		return "HDMI: FRL";
	case SIGNAL_TYPE_VIRTUAL:
		return "Virtual";
	default:
		return "Unknown";
	}
}

/* help functions for signal types manipulation */
static inline bool dc_is_hdmi_tmds_signal(enum signal_type signal)
{
	return (signal == SIGNAL_TYPE_HDMI_TYPE_A);
}

static inline bool dc_is_hdmi_frl_signal(enum signal_type signal)
{
	return ((signal == SIGNAL_TYPE_HDMI_FRL));
}

static inline bool dc_is_hdmi_signal(enum signal_type signal)
{
	return (dc_is_hdmi_tmds_signal(signal) || dc_is_hdmi_frl_signal(signal));
}

static inline bool dc_is_dp_sst_signal(enum signal_type signal)
{
	return (signal == SIGNAL_TYPE_DISPLAY_PORT ||
		signal == SIGNAL_TYPE_EDP);
}

static inline bool dc_is_dp_signal(enum signal_type signal)
{
	return (signal == SIGNAL_TYPE_DISPLAY_PORT ||
		signal == SIGNAL_TYPE_EDP ||
		signal == SIGNAL_TYPE_DISPLAY_PORT_MST);
}

static inline bool dc_is_embedded_signal(enum signal_type signal)
{
	return (signal == SIGNAL_TYPE_EDP || signal == SIGNAL_TYPE_LVDS);
}

static inline bool dc_is_lvds_signal(enum signal_type signal)
{

Annotation

Implementation Notes