intel_display_wa.c

 1// SPDX-License-Identifier: MIT
 2/*
 3 * Copyright © 2023 Intel Corporation
 4 */
 5
 6#include <drm/drm_print.h>
 7
 8#include "i915_reg.h"
 9#include "intel_de.h"
10#include "intel_display_core.h"
11#include "intel_display_regs.h"
12#include "intel_display_wa.h"
13
14static void gen11_display_wa_apply(struct intel_display *display)
15{
16	/* Wa_14010594013 */
17	intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, 0, ICL_DELAY_PMRSP);
18}
19
20static void xe_d_display_wa_apply(struct intel_display *display)
21{
22	/* Wa_14013723622 */
23	intel_de_rmw(display, CLKREQ_POLICY, CLKREQ_POLICY_MEM_UP_OVRD, 0);
24}
25
26static void adlp_display_wa_apply(struct intel_display *display)
27{
28	/* Wa_22011091694:adlp */
29	intel_de_rmw(display, GEN9_CLKGATE_DIS_5, 0, DPCE_GATING_DIS);
30
31	/* Bspec/49189 Initialize Sequence */
32	intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, DDI_CLOCK_REG_ACCESS, 0);
33}
34
35void intel_display_wa_apply(struct intel_display *display)
36{
37	if (display->platform.alderlake_p)
38		adlp_display_wa_apply(display);
39	else if (DISPLAY_VER(display) == 12)
40		xe_d_display_wa_apply(display);
41	else if (DISPLAY_VER(display) == 11)
42		gen11_display_wa_apply(display);
43}
44
45/*
46 * Wa_16025573575:
47 * Fixes: Issue with bitbashing on Xe3 based platforms.
48 * Workaround: Set masks bits in GPIO CTL and preserve it during bitbashing sequence.
49 */
50static bool intel_display_needs_wa_16025573575(struct intel_display *display)
51{
52	return DISPLAY_VERx100(display) == 3000 || DISPLAY_VERx100(display) == 3002 ||
53		DISPLAY_VERx100(display) == 3500;
54}
55
56/*
57 * Wa_14011503117:
58 * Fixes: Before enabling the scaler DE fatal error is masked
59 * Workaround: Unmask the DE fatal error register after enabling the scaler
60 * and after waiting of at least 1 frame.
61 */
62bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa, const char *name)
63{
64	switch (wa) {
65	case INTEL_DISPLAY_WA_16023588340:
66		return intel_display_needs_wa_16023588340(display);
67	case INTEL_DISPLAY_WA_16025573575:
68		return intel_display_needs_wa_16025573575(display);
69	case INTEL_DISPLAY_WA_14011503117:
70		return DISPLAY_VER(display) == 13;
71	case INTEL_DISPLAY_WA_22014263786:
72		return IS_DISPLAY_VERx100(display, 1100, 1400);
73	default:
74		drm_WARN(display->drm, 1, "Missing Wa number: %s\n", name);
75		break;
76	}
77
78	return false;
79}