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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include <drm/drm_print.h>
#include "i915_reg.h"
#include "intel_de.h"
#include "intel_display_core.h"
#include "intel_display_regs.h"
#include "intel_display_wa.h"
static void gen11_display_wa_apply(struct intel_display *display)
{
/* Wa_14010594013 */
intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, 0, ICL_DELAY_PMRSP);
}
static void xe_d_display_wa_apply(struct intel_display *display)
{
/* Wa_14013723622 */
intel_de_rmw(display, CLKREQ_POLICY, CLKREQ_POLICY_MEM_UP_OVRD, 0);
}
static void adlp_display_wa_apply(struct intel_display *display)
{
/* Wa_22011091694:adlp */
intel_de_rmw(display, GEN9_CLKGATE_DIS_5, 0, DPCE_GATING_DIS);
/* Bspec/49189 Initialize Sequence */
intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, DDI_CLOCK_REG_ACCESS, 0);
}
void intel_display_wa_apply(struct intel_display *display)
{
if (display->platform.alderlake_p)
adlp_display_wa_apply(display);
else if (DISPLAY_VER(display) == 12)
xe_d_display_wa_apply(display);
else if (DISPLAY_VER(display) == 11)
gen11_display_wa_apply(display);
}
/*
* Wa_16025573575:
* Fixes: Issue with bitbashing on Xe3 based platforms.
* Workaround: Set masks bits in GPIO CTL and preserve it during bitbashing sequence.
*/
static bool intel_display_needs_wa_16025573575(struct intel_display *display)
{
return DISPLAY_VERx100(display) == 3000 || DISPLAY_VERx100(display) == 3002;
}
/*
* Wa_14011503117:
* Fixes: Before enabling the scaler DE fatal error is masked
* Workaround: Unmask the DE fatal error register after enabling the scaler
* and after waiting of at least 1 frame.
*/
bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa, const char *name)
{
switch (wa) {
case INTEL_DISPLAY_WA_16023588340:
return intel_display_needs_wa_16023588340(display);
case INTEL_DISPLAY_WA_16025573575:
return intel_display_needs_wa_16025573575(display);
case INTEL_DISPLAY_WA_14011503117:
return DISPLAY_VER(display) == 13;
default:
drm_WARN(display->drm, 1, "Missing Wa number: %s\n", name);
break;
}
return false;
}
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