diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_suspend.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_suspend.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c new file mode 100644 index 000000000..81def10eb --- /dev/null +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -0,0 +1,124 @@ +/* + * + * Copyright 2008 (c) Intel Corporation + * Jesse Barnes <jbarnes@virtuousgeek.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "display/intel_de.h" +#include "display/intel_gmbus.h" +#include "display/intel_vga.h" + +#include "i915_drv.h" +#include "i915_reg.h" +#include "i915_suspend.h" +#include "intel_pci_config.h" + +static void intel_save_swf(struct drm_i915_private *dev_priv) +{ + int i; + + /* Scratch space */ + if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) { + for (i = 0; i < 7; i++) { + dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i)); + dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); + } + for (i = 0; i < 3; i++) + dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i)); + } else if (GRAPHICS_VER(dev_priv) == 2) { + for (i = 0; i < 7; i++) + dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); + } else if (HAS_GMCH(dev_priv)) { + for (i = 0; i < 16; i++) { + dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i)); + dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); + } + for (i = 0; i < 3; i++) + dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i)); + } +} + +static void intel_restore_swf(struct drm_i915_private *dev_priv) +{ + int i; + + /* Scratch space */ + if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) { + for (i = 0; i < 7; i++) { + intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]); + intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]); + } else if (GRAPHICS_VER(dev_priv) == 2) { + for (i = 0; i < 7; i++) + intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); + } else if (HAS_GMCH(dev_priv)) { + for (i = 0; i < 16; i++) { + intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]); + intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); + } + for (i = 0; i < 3; i++) + intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]); + } +} + +void i915_save_display(struct drm_i915_private *dev_priv) +{ + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); + + if (!HAS_DISPLAY(dev_priv)) + return; + + /* Display arbitration control */ + if (GRAPHICS_VER(dev_priv) <= 4) + dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, DSPARB); + + if (GRAPHICS_VER(dev_priv) == 4) + pci_read_config_word(pdev, GCDGMBUS, + &dev_priv->regfile.saveGCDGMBUS); + + intel_save_swf(dev_priv); +} + +void i915_restore_display(struct drm_i915_private *dev_priv) +{ + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); + + if (!HAS_DISPLAY(dev_priv)) + return; + + intel_restore_swf(dev_priv); + + if (GRAPHICS_VER(dev_priv) == 4) + pci_write_config_word(pdev, GCDGMBUS, + dev_priv->regfile.saveGCDGMBUS); + + /* Display arbitration */ + if (GRAPHICS_VER(dev_priv) <= 4) + intel_de_write(dev_priv, DSPARB, dev_priv->regfile.saveDSPARB); + + intel_vga_redisable(dev_priv); + + intel_gmbus_reset(dev_priv); +} |