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d1dc0c08e2
Add display specific helpers for getting the register offset, checking for equality and validity. Add them as static inlines for increased type safety. Reviewed-by: Michał Grzelak <michal.grzelak@intel.com> Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patch.msgid.link/7fe12d4e5465778209ccf29359767a197b031dd9.1777972548.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2026 Intel Corporation
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*/
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#include <linux/minmax.h>
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#include <drm/drm_print.h>
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#include "intel_de.h"
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#include "intel_display_core.h"
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#include "intel_mchbar.h"
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static bool has_mchbar_mirror(struct intel_display *display)
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{
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return DISPLAY_VER(display) < 14;
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}
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static u32 mchbar_mirror_base(struct intel_display *display)
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{
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if (DISPLAY_VER(display) >= 6)
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return MCHBAR_MIRROR_BASE_SNB;
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else
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return MCHBAR_MIRROR_BASE;
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}
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static u32 mchbar_mirror_end(struct intel_display *display)
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{
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if (DISPLAY_VER(display) >= 12 && !display->platform.rocketlake)
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return MCHBAR_MIRROR_END_TGL;
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else if (DISPLAY_VER(display) >= 11)
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return MCHBAR_MIRROR_END_ICL_RKL;
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else if (DISPLAY_VER(display) >= 6)
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return MCHBAR_MIRROR_END_SNB;
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else
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return MCHBAR_MIRROR_END;
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}
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static u32 mchbar_mirror_len(struct intel_display *display)
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{
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return mchbar_mirror_end(display) - mchbar_mirror_base(display) + 1;
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}
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static bool is_mchbar_reg(struct intel_display *display, intel_reg_t reg)
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{
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return has_mchbar_mirror(display) &&
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in_range32(intel_reg_offset(reg),
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mchbar_mirror_base(display),
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mchbar_mirror_len(display));
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}
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static void assert_is_mchbar_reg(struct intel_display *display, intel_reg_t reg)
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{
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drm_WARN(display->drm, !is_mchbar_reg(display, reg),
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"Reading non-MCHBAR register 0x%x\n",
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intel_reg_offset(reg));
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}
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u16 intel_mchbar_read16(struct intel_display *display, intel_reg_t reg)
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{
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assert_is_mchbar_reg(display, reg);
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return intel_de_read16(display, reg);
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}
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u32 intel_mchbar_read(struct intel_display *display, intel_reg_t reg)
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{
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assert_is_mchbar_reg(display, reg);
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return intel_de_read(display, reg);
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}
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u64 intel_mchbar_read64_2x32(struct intel_display *display, intel_reg_t reg)
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{
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assert_is_mchbar_reg(display, reg);
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return intel_de_read64_2x32(display, reg);
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}
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