intel_dram.h

 1/* SPDX-License-Identifier: MIT */
 2/*
 3 * Copyright © 2020 Intel Corporation
 4 */
 5
 6#ifndef __INTEL_DRAM_H__
 7#define __INTEL_DRAM_H__
 8
 9#include <linux/types.h>
10
11struct drm_i915_private;
12struct drm_device;
13
14struct dram_info {
15	enum intel_dram_type {
16		INTEL_DRAM_UNKNOWN,
17		INTEL_DRAM_DDR2,
18		INTEL_DRAM_DDR3,
19		INTEL_DRAM_DDR4,
20		INTEL_DRAM_LPDDR3,
21		INTEL_DRAM_LPDDR4,
22		INTEL_DRAM_DDR5,
23		INTEL_DRAM_LPDDR5,
24		INTEL_DRAM_GDDR,
25		INTEL_DRAM_GDDR_ECC,
26		__INTEL_DRAM_TYPE_MAX,
27	} type;
28	unsigned int fsb_freq;
29	unsigned int mem_freq;
30	u8 num_channels;
31	u8 num_qgv_points;
32	u8 num_psf_gv_points;
33	bool ecc_impacting_de_bw; /* Only valid from Xe3p_LPD onward. */
34	bool symmetric_memory;
35	bool has_16gb_dimms;
36};
37
38void intel_dram_edram_detect(struct drm_i915_private *i915);
39int intel_dram_detect(struct drm_i915_private *i915);
40unsigned int intel_fsb_freq(struct drm_i915_private *i915);
41unsigned int intel_mem_freq(struct drm_i915_private *i915);
42const struct dram_info *intel_dram_info(struct drm_device *drm);
43const char *intel_dram_type_str(enum intel_dram_type type);
44
45#endif /* __INTEL_DRAM_H__ */