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 | 95 |
1 files changed, 95 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..4dd0ce267994 --- /dev/null +++ b/drivers/gpu/drm/i915/display/i9xx_display_sr.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ + +#include "i915_drv.h" +#include "i915_reg.h" +#include "i9xx_display_sr.h" +#include "intel_de.h" +#include "intel_gmbus.h" +#include "intel_pci_config.h" + +static void i9xx_display_save_swf(struct drm_i915_private *i915) +{ + int i; + + /* Scratch space */ + if (GRAPHICS_VER(i915) == 2 && IS_MOBILE(i915)) { + for (i = 0; i < 7; i++) { + i915->regfile.saveSWF0[i] = intel_de_read(i915, SWF0(i915, i)); + i915->regfile.saveSWF1[i] = intel_de_read(i915, SWF1(i915, i)); + } + for (i = 0; i < 3; i++) + i915->regfile.saveSWF3[i] = intel_de_read(i915, SWF3(i915, i)); + } else if (GRAPHICS_VER(i915) == 2) { + for (i = 0; i < 7; i++) + i915->regfile.saveSWF1[i] = intel_de_read(i915, SWF1(i915, i)); + } else if (HAS_GMCH(i915)) { + for (i = 0; i < 16; i++) { + i915->regfile.saveSWF0[i] = intel_de_read(i915, SWF0(i915, i)); + i915->regfile.saveSWF1[i] = intel_de_read(i915, SWF1(i915, i)); + } + for (i = 0; i < 3; i++) + i915->regfile.saveSWF3[i] = intel_de_read(i915, SWF3(i915, i)); + } +} + +static void i9xx_display_restore_swf(struct drm_i915_private *i915) +{ + int i; + + /* Scratch space */ + if (GRAPHICS_VER(i915) == 2 && IS_MOBILE(i915)) { + for (i = 0; i < 7; i++) { + intel_de_write(i915, SWF0(i915, i), i915->regfile.saveSWF0[i]); + intel_de_write(i915, SWF1(i915, i), i915->regfile.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(i915, SWF3(i915, i), i915->regfile.saveSWF3[i]); + } else if (GRAPHICS_VER(i915) == 2) { + for (i = 0; i < 7; i++) + intel_de_write(i915, SWF1(i915, i), i915->regfile.saveSWF1[i]); + } else if (HAS_GMCH(i915)) { + for (i = 0; i < 16; i++) { + intel_de_write(i915, SWF0(i915, i), i915->regfile.saveSWF0[i]); + intel_de_write(i915, SWF1(i915, i), i915->regfile.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(i915, SWF3(i915, i), i915->regfile.saveSWF3[i]); + } +} + +void i9xx_display_sr_save(struct drm_i915_private *i915) +{ + struct pci_dev *pdev = to_pci_dev(i915->drm.dev); + + if (!HAS_DISPLAY(i915)) + return; + + /* Display arbitration control */ + if (GRAPHICS_VER(i915) <= 4) + i915->regfile.saveDSPARB = intel_de_read(i915, DSPARB(i915)); + + if (GRAPHICS_VER(i915) == 4) + pci_read_config_word(pdev, GCDGMBUS, &i915->regfile.saveGCDGMBUS); + + i9xx_display_save_swf(i915); +} + +void i9xx_display_sr_restore(struct drm_i915_private *i915) +{ + struct pci_dev *pdev = to_pci_dev(i915->drm.dev); + + if (!HAS_DISPLAY(i915)) + return; + + i9xx_display_restore_swf(i915); + + if (GRAPHICS_VER(i915) == 4) + pci_write_config_word(pdev, GCDGMBUS, i915->regfile.saveGCDGMBUS); + + /* Display arbitration */ + if (GRAPHICS_VER(i915) <= 4) + intel_de_write(i915, DSPARB(i915), i915->regfile.saveDSPARB); +} |