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Name	Size	Permission	Date
bridge	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
display	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
i2c	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
ttm	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
amd_asic_type.h	2.33 KB	-rw-r--r--	2024-03-10 20:38
drm_accel.h	2.25 KB	-rw-r--r--	2026-05-26 09:55
drm_aperture.h	1.06 KB	-rw-r--r--	2024-03-10 20:38
drm_atomic.h	42.54 KB	-rw-r--r--	2026-05-26 09:55
drm_atomic_helper.h	10.78 KB	-rw-r--r--	2024-03-10 20:38
drm_atomic_state_helper.h	4.42 KB	-rw-r--r--	2024-03-10 20:38
drm_atomic_uapi.h	2.06 KB	-rw-r--r--	2024-03-10 20:38
drm_audio_component.h	3.84 KB	-rw-r--r--	2024-03-10 20:38
drm_auth.h	4.18 KB	-rw-r--r--	2024-03-10 20:38
drm_blend.h	2.35 KB	-rw-r--r--	2024-03-10 20:38
drm_bridge.h	34.88 KB	-rw-r--r--	2026-05-26 09:55
drm_bridge_connector.h	405 B	-rw-r--r--	2024-03-10 20:38
drm_buddy.h	4.17 KB	-rw-r--r--	2024-03-10 20:38
drm_cache.h	3.3 KB	-rw-r--r--	2024-03-10 20:38
drm_client.h	5.04 KB	-rw-r--r--	2024-03-10 20:38
drm_color_mgmt.h	3.91 KB	-rw-r--r--	2024-03-10 20:38
drm_connector.h	65.08 KB	-rw-r--r--	2026-05-26 09:55
drm_crtc.h	44.52 KB	-rw-r--r--	2024-03-10 20:38
drm_crtc_helper.h	2.51 KB	-rw-r--r--	2024-03-10 20:38
drm_damage_helper.h	3.33 KB	-rw-r--r--	2024-03-10 20:38
drm_debugfs.h	5.68 KB	-rw-r--r--	2024-03-10 20:38
drm_debugfs_crc.h	2.66 KB	-rw-r--r--	2024-03-10 20:38
drm_device.h	7.64 KB	-rw-r--r--	2026-05-26 09:55
drm_displayid.h	4.99 KB	-rw-r--r--	2026-05-26 09:55
drm_drv.h	17.81 KB	-rw-r--r--	2024-03-10 20:38
drm_edid.h	15.68 KB	-rw-r--r--	2026-05-26 09:55
drm_eld.h	4.76 KB	-rw-r--r--	2024-03-10 20:38
drm_encoder.h	11.07 KB	-rw-r--r--	2024-03-10 20:38
drm_encoder_slave.h	6.46 KB	-rw-r--r--	2024-03-10 20:38
drm_exec.h	4.29 KB	-rw-r--r--	2024-03-10 20:38
drm_fb_dma_helper.h	575 B	-rw-r--r--	2024-03-10 20:38
drm_fb_helper.h	11.75 KB	-rw-r--r--	2024-03-10 20:38
drm_fbdev_dma.h	656 B	-rw-r--r--	2026-05-26 09:55
drm_fbdev_generic.h	349 B	-rw-r--r--	2024-03-10 20:38
drm_file.h	14.24 KB	-rw-r--r--	2026-05-26 09:55
drm_fixed.h	4.83 KB	-rw-r--r--	2026-05-26 09:55
drm_flip_work.h	2.63 KB	-rw-r--r--	2024-03-10 20:38
drm_format_helper.h	5.33 KB	-rw-r--r--	2024-03-10 20:38
drm_fourcc.h	9.91 KB	-rw-r--r--	2024-03-10 20:38
drm_framebuffer.h	10.04 KB	-rw-r--r--	2026-05-26 09:55
drm_gem.h	18.6 KB	-rw-r--r--	2026-05-26 09:55
drm_gem_atomic_helper.h	5.52 KB	-rw-r--r--	2024-03-10 20:38
drm_gem_dma_helper.h	9.26 KB	-rw-r--r--	2024-03-10 20:38
drm_gem_framebuffer_helper.h	1.93 KB	-rw-r--r--	2024-03-10 20:38
drm_gem_shmem_helper.h	7.93 KB	-rw-r--r--	2024-03-10 20:38
drm_gem_ttm_helper.h	822 B	-rw-r--r--	2024-03-10 20:38
drm_gem_vram_helper.h	6.08 KB	-rw-r--r--	2024-03-10 20:38
drm_gpuvm.h	33.54 KB	-rw-r--r--	2024-03-10 20:38
drm_ioctl.h	5.82 KB	-rw-r--r--	2024-03-10 20:38
drm_kunit_helpers.h	4.21 KB	-rw-r--r--	2026-05-26 09:55
drm_lease.h	1010 B	-rw-r--r--	2024-03-10 20:38
drm_managed.h	3.9 KB	-rw-r--r--	2024-03-10 20:38
drm_mipi_dbi.h	6.87 KB	-rw-r--r--	2024-03-10 20:38
drm_mipi_dsi.h	13.22 KB	-rw-r--r--	2026-05-26 09:55
drm_mm.h	17.53 KB	-rw-r--r--	2024-03-10 20:38
drm_mode_config.h	32.81 KB	-rw-r--r--	2024-03-10 20:38
drm_mode_object.h	5.46 KB	-rw-r--r--	2024-03-10 20:38
drm_modes.h	19.9 KB	-rw-r--r--	2024-03-10 20:38
drm_modeset_helper.h	1.77 KB	-rw-r--r--	2024-03-10 20:38
drm_modeset_helper_vtables.h	59.37 KB	-rw-r--r--	2026-05-26 09:55
drm_modeset_lock.h	7.07 KB	-rw-r--r--	2024-03-10 20:38
drm_module.h	3.72 KB	-rw-r--r--	2024-03-10 20:38
drm_of.h	5.22 KB	-rw-r--r--	2024-03-10 20:38
drm_panel.h	8.89 KB	-rw-r--r--	2024-03-10 20:38
drm_pciids.h	61.04 KB	-rw-r--r--	2024-03-10 20:38
drm_plane.h	30.92 KB	-rw-r--r--	2024-03-10 20:38
drm_plane_helper.h	2.22 KB	-rw-r--r--	2024-03-10 20:38
drm_prime.h	4.06 KB	-rw-r--r--	2024-03-10 20:38
drm_print.h	20.39 KB	-rw-r--r--	2026-05-26 09:55
drm_privacy_screen_consumer.h	1.94 KB	-rw-r--r--	2024-03-10 20:38
drm_privacy_screen_driver.h	2.99 KB	-rw-r--r--	2024-03-10 20:38
drm_privacy_screen_machine.h	1.25 KB	-rw-r--r--	2024-03-10 20:38
drm_probe_helper.h	1.57 KB	-rw-r--r--	2024-03-10 20:38
drm_property.h	11.99 KB	-rw-r--r--	2024-03-10 20:38
drm_rect.h	7.17 KB	-rw-r--r--	2024-03-10 20:38
drm_self_refresh_helper.h	594 B	-rw-r--r--	2024-03-10 20:38
drm_simple_kms_helper.h	9.52 KB	-rw-r--r--	2024-03-10 20:38
drm_suballoc.h	2.75 KB	-rw-r--r--	2024-03-10 20:38
drm_syncobj.h	3.95 KB	-rw-r--r--	2024-03-10 20:38
drm_sysfs.h	512 B	-rw-r--r--	2024-03-10 20:38
drm_util.h	2.58 KB	-rw-r--r--	2024-03-10 20:38
drm_utils.h	592 B	-rw-r--r--	2026-05-26 09:55
drm_vblank.h	10.18 KB	-rw-r--r--	2026-05-26 09:55
drm_vblank_work.h	1.91 KB	-rw-r--r--	2024-03-10 20:38
drm_vma_manager.h	8.23 KB	-rw-r--r--	2024-03-10 20:38
drm_writeback.h	4.45 KB	-rw-r--r--	2024-03-10 20:38
gma_drm.h	413 B	-rw-r--r--	2024-03-10 20:38
gpu_scheduler.h	20.85 KB	-rw-r--r--	2026-05-26 09:55
gud.h	11.65 KB	-rw-r--r--	2024-03-10 20:38
i915_component.h	1.81 KB	-rw-r--r--	2024-03-10 20:38
i915_drm.h	3.57 KB	-rw-r--r--	2024-03-10 20:38
i915_gsc_proxy_mei_interface.h	1.52 KB	-rw-r--r--	2024-03-10 20:38
i915_hdcp_interface.h	16.22 KB	-rw-r--r--	2024-03-10 20:38
i915_pciids.h	23.94 KB	-rw-r--r--	2026-05-26 09:55
i915_pxp_tee_interface.h	1.28 KB	-rw-r--r--	2024-03-10 20:38
intel-gtt.h	1015 B	-rw-r--r--	2024-03-10 20:38
intel_lpe_audio.h	1.72 KB	-rw-r--r--	2024-03-10 20:38
spsc_queue.h	3.08 KB	-rw-r--r--	2026-05-26 09:55
task_barrier.h	2.95 KB	-rw-r--r--	2024-03-10 20:38
xe_pciids.h	5.37 KB	-rw-r--r--	2024-03-10 20:38

Rename

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2023 Intel Corporation
 */

#ifndef __DRM_ELD_H__
#define __DRM_ELD_H__

#include <linux/types.h>

struct cea_sad;

/* ELD Header Block */
#define DRM_ELD_HEADER_BLOCK_SIZE	4

#define DRM_ELD_VER			0
# define DRM_ELD_VER_SHIFT		3
# define DRM_ELD_VER_MASK		(0x1f << 3)
# define DRM_ELD_VER_CEA861D		(2 << 3) /* supports 861D or below */
# define DRM_ELD_VER_CANNED		(0x1f << 3)

#define DRM_ELD_BASELINE_ELD_LEN	2	/* in dwords! */

/* ELD Baseline Block for ELD_Ver == 2 */
#define DRM_ELD_CEA_EDID_VER_MNL	4
# define DRM_ELD_CEA_EDID_VER_SHIFT	5
# define DRM_ELD_CEA_EDID_VER_MASK	(7 << 5)
# define DRM_ELD_CEA_EDID_VER_NONE	(0 << 5)
# define DRM_ELD_CEA_EDID_VER_CEA861	(1 << 5)
# define DRM_ELD_CEA_EDID_VER_CEA861A	(2 << 5)
# define DRM_ELD_CEA_EDID_VER_CEA861BCD	(3 << 5)
# define DRM_ELD_MNL_SHIFT		0
# define DRM_ELD_MNL_MASK		(0x1f << 0)

#define DRM_ELD_SAD_COUNT_CONN_TYPE	5
# define DRM_ELD_SAD_COUNT_SHIFT	4
# define DRM_ELD_SAD_COUNT_MASK		(0xf << 4)
# define DRM_ELD_CONN_TYPE_SHIFT	2
# define DRM_ELD_CONN_TYPE_MASK		(3 << 2)
# define DRM_ELD_CONN_TYPE_HDMI		(0 << 2)
# define DRM_ELD_CONN_TYPE_DP		(1 << 2)
# define DRM_ELD_SUPPORTS_AI		(1 << 1)
# define DRM_ELD_SUPPORTS_HDCP		(1 << 0)

#define DRM_ELD_AUD_SYNCH_DELAY		6	/* in units of 2 ms */
# define DRM_ELD_AUD_SYNCH_DELAY_MAX	0xfa	/* 500 ms */

#define DRM_ELD_SPEAKER			7
# define DRM_ELD_SPEAKER_MASK		0x7f
# define DRM_ELD_SPEAKER_RLRC		(1 << 6)
# define DRM_ELD_SPEAKER_FLRC		(1 << 5)
# define DRM_ELD_SPEAKER_RC		(1 << 4)
# define DRM_ELD_SPEAKER_RLR		(1 << 3)
# define DRM_ELD_SPEAKER_FC		(1 << 2)
# define DRM_ELD_SPEAKER_LFE		(1 << 1)
# define DRM_ELD_SPEAKER_FLR		(1 << 0)

#define DRM_ELD_PORT_ID			8	/* offsets 8..15 inclusive */
# define DRM_ELD_PORT_ID_LEN		8

#define DRM_ELD_MANUFACTURER_NAME0	16
#define DRM_ELD_MANUFACTURER_NAME1	17

#define DRM_ELD_PRODUCT_CODE0		18
#define DRM_ELD_PRODUCT_CODE1		19

#define DRM_ELD_MONITOR_NAME_STRING	20	/* offsets 20..(20+mnl-1) inclusive */

#define DRM_ELD_CEA_SAD(mnl, sad)	(20 + (mnl) + 3 * (sad))

/**
 * drm_eld_mnl - Get ELD monitor name length in bytes.
 * @eld: pointer to an eld memory structure with mnl set
 */
static inline int drm_eld_mnl(const u8 *eld)
{
	return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
}

int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad);
int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad);

/**
 * drm_eld_sad - Get ELD SAD structures.
 * @eld: pointer to an eld memory structure with sad_count set
 */
static inline const u8 *drm_eld_sad(const u8 *eld)
{
	unsigned int ver, mnl;

ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
	if (ver != 2 && ver != 31)
		return NULL;

mnl = drm_eld_mnl(eld);
	if (mnl > 16)
		return NULL;

return eld + DRM_ELD_CEA_SAD(mnl, 0);
}

/**
 * drm_eld_sad_count - Get ELD SAD count.
 * @eld: pointer to an eld memory structure with sad_count set
 */
static inline int drm_eld_sad_count(const u8 *eld)
{
	return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
		DRM_ELD_SAD_COUNT_SHIFT;
}

/**
 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
 * @eld: pointer to an eld memory structure with mnl and sad_count set
 *
 * This is a helper for determining the payload size of the baseline block, in
 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
 */
static inline int drm_eld_calc_baseline_block_size(const u8 *eld)
{
	return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
		drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
}

/**
 * drm_eld_size - Get ELD size in bytes
 * @eld: pointer to a complete eld memory structure
 *
 * The returned value does not include the vendor block. It's vendor specific,
 * and comprises of the remaining bytes in the ELD memory buffer after
 * drm_eld_size() bytes of header and baseline block.
 *
 * The returned value is guaranteed to be a multiple of 4.
 */
static inline int drm_eld_size(const u8 *eld)
{
	return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
}

/**
 * drm_eld_get_spk_alloc - Get speaker allocation
 * @eld: pointer to an ELD memory structure
 *
 * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
 * field definitions to identify speakers.
 */
static inline u8 drm_eld_get_spk_alloc(const u8 *eld)
{
	return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
}

/**
 * drm_eld_get_conn_type - Get device type hdmi/dp connected
 * @eld: pointer to an ELD memory structure
 *
 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
 * identify the display type connected.
 */
static inline u8 drm_eld_get_conn_type(const u8 *eld)
{
	return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
}

#endif /* __DRM_ELD_H__ */