diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/i9xx_display_sr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/i9xx_display_sr.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/i9xx_display_sr.c b/drivers/gpu/drm/i915/display/i9xx_display_sr.c new file mode 100644 index 000000000000..32abe9743014 --- /dev/null +++ b/drivers/gpu/drm/i915/display/i9xx_display_sr.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ + +#include <drm/drm_device.h> + +#include "i915_reg.h" +#include "i9xx_display_sr.h" +#include "i9xx_wm_regs.h" +#include "intel_de.h" +#include "intel_gmbus.h" +#include "intel_pci_config.h" + +static void i9xx_display_save_swf(struct intel_display *display) +{ + int i; + + /* Scratch space */ + if (DISPLAY_VER(display) == 2 && display->platform.mobile) { + for (i = 0; i < 7; i++) { + display->restore.saveSWF0[i] = intel_de_read(display, SWF0(display, i)); + display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); + } + for (i = 0; i < 3; i++) + display->restore.saveSWF3[i] = intel_de_read(display, SWF3(display, i)); + } else if (DISPLAY_VER(display) == 2) { + for (i = 0; i < 7; i++) + display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); + } else if (HAS_GMCH(display)) { + for (i = 0; i < 16; i++) { + display->restore.saveSWF0[i] = intel_de_read(display, SWF0(display, i)); + display->restore.saveSWF1[i] = intel_de_read(display, SWF1(display, i)); + } + for (i = 0; i < 3; i++) + display->restore.saveSWF3[i] = intel_de_read(display, SWF3(display, i)); + } +} + +static void i9xx_display_restore_swf(struct intel_display *display) +{ + int i; + + /* Scratch space */ + if (DISPLAY_VER(display) == 2 && display->platform.mobile) { + for (i = 0; i < 7; i++) { + intel_de_write(display, SWF0(display, i), display->restore.saveSWF0[i]); + intel_de_write(display, SWF1(display, i), display->restore.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(display, SWF3(display, i), display->restore.saveSWF3[i]); + } else if (DISPLAY_VER(display) == 2) { + for (i = 0; i < 7; i++) + intel_de_write(display, SWF1(display, i), display->restore.saveSWF1[i]); + } else if (HAS_GMCH(display)) { + for (i = 0; i < 16; i++) { + intel_de_write(display, SWF0(display, i), display->restore.saveSWF0[i]); + intel_de_write(display, SWF1(display, i), display->restore.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(display, SWF3(display, i), display->restore.saveSWF3[i]); + } +} + +void i9xx_display_sr_save(struct intel_display *display) +{ + struct pci_dev *pdev = to_pci_dev(display->drm->dev); + + if (!HAS_DISPLAY(display)) + return; + + /* Display arbitration control */ + if (DISPLAY_VER(display) <= 4) + display->restore.saveDSPARB = intel_de_read(display, DSPARB(display)); + + if (DISPLAY_VER(display) == 4) + pci_read_config_word(pdev, GCDGMBUS, &display->restore.saveGCDGMBUS); + + i9xx_display_save_swf(display); +} + +void i9xx_display_sr_restore(struct intel_display *display) +{ + struct pci_dev *pdev = to_pci_dev(display->drm->dev); + + if (!HAS_DISPLAY(display)) + return; + + i9xx_display_restore_swf(display); + + if (DISPLAY_VER(display) == 4) + pci_write_config_word(pdev, GCDGMBUS, display->restore.saveGCDGMBUS); + + /* Display arbitration */ + if (DISPLAY_VER(display) <= 4) + intel_de_write(display, DSPARB(display), display->restore.saveDSPARB); +} |