| 1 | // SPDX-License-Identifier: MIT |
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| 2 | /* |
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| 3 | * Copyright © 2024 Intel Corporation |
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| 4 | */ |
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| 5 | |
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| 6 | #include <drm/drm_device.h> |
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| 7 | |
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| 8 | #include "i9xx_display_sr.h" |
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| 9 | #include "i9xx_wm_regs.h" |
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| 10 | #include "intel_de.h" |
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| 11 | #include "intel_display_regs.h" |
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| 12 | #include "intel_gmbus.h" |
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| 13 | #include "intel_pci_config.h" |
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| 14 | |
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| 15 | static void i9xx_display_save_swf(struct intel_display *display) |
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| 16 | { |
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| 17 | int i; |
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| 18 | |
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| 19 | /* Scratch space */ |
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| 20 | if (DISPLAY_VER(display) == 2 && display->platform.mobile) { |
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| 21 | for (i = 0; i < 7; i++) { |
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| 22 | display->restore.saveSWF0[i] = intel_de_read(display, SWF0(display, i)); |
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| 23 | display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); |
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| 24 | } |
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| 25 | for (i = 0; i < 3; i++) |
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| 26 | display->restore.saveSWF3[i] = intel_de_read(display, SWF3(display, i)); |
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| 27 | } else if (DISPLAY_VER(display) == 2) { |
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| 28 | for (i = 0; i < 7; i++) |
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| 29 | display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); |
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| 30 | } else if (HAS_GMCH(display)) { |
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| 31 | for (i = 0; i < 16; i++) { |
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| 32 | display->restore.saveSWF0[i] = intel_de_read(display, SWF0(display, i)); |
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| 33 | display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); |
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| 34 | } |
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| 35 | for (i = 0; i < 3; i++) |
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| 36 | display->restore.saveSWF3[i] = intel_de_read(display, SWF3(display, i)); |
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| 37 | } |
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| 38 | } |
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| 39 | |
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| 40 | static void i9xx_display_restore_swf(struct intel_display *display) |
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| 41 | { |
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| 42 | int i; |
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| 43 | |
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| 44 | /* Scratch space */ |
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| 45 | if (DISPLAY_VER(display) == 2 && display->platform.mobile) { |
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| 46 | for (i = 0; i < 7; i++) { |
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| 47 | intel_de_write(display, SWF0(display, i), val: display->restore.saveSWF0[i]); |
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| 48 | intel_de_write(display, SWF1(display, i), val: display->restore.saveSWF1[i]); |
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| 49 | } |
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| 50 | for (i = 0; i < 3; i++) |
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| 51 | intel_de_write(display, SWF3(display, i), val: display->restore.saveSWF3[i]); |
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| 52 | } else if (DISPLAY_VER(display) == 2) { |
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| 53 | for (i = 0; i < 7; i++) |
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| 54 | intel_de_write(display, SWF1(display, i), val: display->restore.saveSWF1[i]); |
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| 55 | } else if (HAS_GMCH(display)) { |
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| 56 | for (i = 0; i < 16; i++) { |
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| 57 | intel_de_write(display, SWF0(display, i), val: display->restore.saveSWF0[i]); |
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| 58 | intel_de_write(display, SWF1(display, i), val: display->restore.saveSWF1[i]); |
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| 59 | } |
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| 60 | for (i = 0; i < 3; i++) |
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| 61 | intel_de_write(display, SWF3(display, i), val: display->restore.saveSWF3[i]); |
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| 62 | } |
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| 63 | } |
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| 64 | |
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| 65 | void i9xx_display_sr_save(struct intel_display *display) |
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| 66 | { |
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| 67 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); |
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| 68 | |
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| 69 | if (!HAS_DISPLAY(display)) |
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| 70 | return; |
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| 71 | |
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| 72 | /* Display arbitration control */ |
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| 73 | if (DISPLAY_VER(display) <= 4) |
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| 74 | display->restore.saveDSPARB = intel_de_read(display, DSPARB(display)); |
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| 75 | |
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| 76 | if (DISPLAY_VER(display) == 4) |
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| 77 | pci_read_config_word(dev: pdev, GCDGMBUS, val: &display->restore.saveGCDGMBUS); |
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| 78 | |
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| 79 | i9xx_display_save_swf(display); |
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| 80 | } |
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| 81 | |
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| 82 | void i9xx_display_sr_restore(struct intel_display *display) |
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| 83 | { |
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| 84 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); |
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| 85 | |
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| 86 | if (!HAS_DISPLAY(display)) |
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| 87 | return; |
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| 88 | |
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| 89 | i9xx_display_restore_swf(display); |
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| 90 | |
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| 91 | if (DISPLAY_VER(display) == 4) |
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| 92 | pci_write_config_word(dev: pdev, GCDGMBUS, val: display->restore.saveGCDGMBUS); |
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| 93 | |
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| 94 | /* Display arbitration */ |
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| 95 | if (DISPLAY_VER(display) <= 4) |
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| 96 | intel_de_write(display, DSPARB(display), val: display->restore.saveDSPARB); |
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| 97 | } |
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| 98 | |
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