diff options
| author | Andres Salomon <dilinger@queued.net> | 2008-04-28 05:15:27 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 11:58:39 -0400 |
| commit | f694e53bd0db69557ee8e0db2d1602818ff173b0 (patch) | |
| tree | d904b492105055a2adf00c60fa0324c0905b3bbe /drivers/video/geode/lxfb_core.c | |
| parent | aec40532c4d1183fa1ec415bb7dae08e19fc6b01 (diff) | |
lxfb: add power management functionality
This adds the ability to suspend/resume the lxfb driver, which includes:
- Register and palette saving code; registers are stored in lxfb_par.
A few MSR values are saved as well.
- lx_powerup and lx_powerdown functions which restore/save registers and
enable/disable graphic engines.
- lxfb_suspend/lxfb_resume
Originally based on a patch by Jordan Crouse.
[akpm@linux-foundation.org: be conventional, save an ifdef]
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/geode/lxfb_core.c')
| -rw-r--r-- | drivers/video/geode/lxfb_core.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/video/geode/lxfb_core.c b/drivers/video/geode/lxfb_core.c index 19eabef1077..b565882eee3 100644 --- a/drivers/video/geode/lxfb_core.c +++ b/drivers/video/geode/lxfb_core.c | |||
| @@ -428,6 +428,45 @@ static struct fb_info * __init lxfb_init_fbinfo(struct device *dev) | |||
| 428 | return info; | 428 | return info; |
| 429 | } | 429 | } |
| 430 | 430 | ||
| 431 | #ifdef CONFIG_PM | ||
| 432 | static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state) | ||
| 433 | { | ||
| 434 | struct fb_info *info = pci_get_drvdata(pdev); | ||
| 435 | |||
| 436 | if (state.event == PM_EVENT_SUSPEND) { | ||
| 437 | acquire_console_sem(); | ||
| 438 | lx_powerdown(info); | ||
| 439 | fb_set_suspend(info, 1); | ||
| 440 | release_console_sem(); | ||
| 441 | } | ||
| 442 | |||
| 443 | /* there's no point in setting PCI states; we emulate PCI, so | ||
| 444 | * we don't end up getting power savings anyways */ | ||
| 445 | |||
| 446 | return 0; | ||
| 447 | } | ||
| 448 | |||
| 449 | static int lxfb_resume(struct pci_dev *pdev) | ||
| 450 | { | ||
| 451 | struct fb_info *info = pci_get_drvdata(pdev); | ||
| 452 | int ret; | ||
| 453 | |||
| 454 | acquire_console_sem(); | ||
| 455 | ret = lx_powerup(info); | ||
| 456 | if (ret) { | ||
| 457 | printk(KERN_ERR "lxfb: power up failed!\n"); | ||
| 458 | return ret; | ||
| 459 | } | ||
| 460 | |||
| 461 | fb_set_suspend(info, 0); | ||
| 462 | release_console_sem(); | ||
| 463 | return 0; | ||
| 464 | } | ||
| 465 | #else | ||
| 466 | #define lxfb_suspend NULL | ||
| 467 | #define lxfb_resume NULL | ||
| 468 | #endif | ||
| 469 | |||
| 431 | static int __init lxfb_probe(struct pci_dev *pdev, | 470 | static int __init lxfb_probe(struct pci_dev *pdev, |
| 432 | const struct pci_device_id *id) | 471 | const struct pci_device_id *id) |
| 433 | { | 472 | { |
| @@ -553,6 +592,8 @@ static struct pci_driver lxfb_driver = { | |||
| 553 | .id_table = lxfb_id_table, | 592 | .id_table = lxfb_id_table, |
| 554 | .probe = lxfb_probe, | 593 | .probe = lxfb_probe, |
| 555 | .remove = lxfb_remove, | 594 | .remove = lxfb_remove, |
| 595 | .suspend = lxfb_suspend, | ||
| 596 | .resume = lxfb_resume, | ||
| 556 | }; | 597 | }; |
| 557 | 598 | ||
| 558 | #ifndef MODULE | 599 | #ifndef MODULE |