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| author | Deepak Saxena <dsaxena@laptop.org> | 2010-04-08 11:15:41 -0600 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2010-10-24 13:04:46 +0000 |
| commit | 3fd9b6cc38028ea64e9a39c6af9d5ad928594be6 (patch) | |
| tree | c61d7bbb85d98cc78bd5e8011de8a52bac9e698f /drivers/video | |
| parent | efd4f6398dc92b5bf392670df862f42a19f34cf2 (diff) | |
| download | linux-3fd9b6cc38028ea64e9a39c6af9d5ad928594be6.tar.bz2 | |
Minimal support for viafb suspend/resume
This patch adds minimal support for suspend/resume of the
VIA framebuffer device. It requires a version of OFW
that restores the video mode.
This patch is OLPC-specific as the proper upstream solution
is to move the VIA video path to using the kernel modesetting
infrastructure and doing a proper save/restore in the kernel.
[jc: extensive changes for 2.6.34 merge]
Signed-off-by: Deepak Saxena <dsaxena@laptop.org>
[fts: viafb_driver moved from viafbdev.c to via-core.c]
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Cc: Joseph Chan <JosephChan@via.com.tw>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/via/via-core.c | 4 | ||||
| -rw-r--r-- | drivers/video/via/viafbdev.c | 46 | ||||
| -rw-r--r-- | drivers/video/via/viafbdev.h | 5 |
3 files changed, 55 insertions, 0 deletions
diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c index 69101ab9f7c9..9b487a6a8d08 100644 --- a/drivers/video/via/via-core.c +++ b/drivers/video/via/via-core.c @@ -644,6 +644,10 @@ static struct pci_driver via_driver = { .id_table = via_pci_table, .probe = via_pci_probe, .remove = __devexit_p(via_pci_remove), +#ifdef CONFIG_PM + .suspend = viafb_suspend, + .resume = viafb_resume, +#endif }; static int __init via_core_init(void) diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c index 7cc057d7ef5e..596235b5a5f0 100644 --- a/drivers/video/via/viafbdev.c +++ b/drivers/video/via/viafbdev.c @@ -1669,6 +1669,52 @@ static int parse_mode(const char *str, u32 *xres, u32 *yres) } +#ifdef CONFIG_PM +int viafb_suspend(struct pci_dev *pdev, pm_message_t state) +{ + if (state.event == PM_EVENT_SUSPEND) { + acquire_console_sem(); + + memcpy_fromio(viaparinfo->shared->saved_regs, + viaparinfo->shared->vdev->engine_mmio + 0x100, + 0xff * sizeof(u32)); + + fb_set_suspend(viafbinfo, 1); + + viafb_sync(viafbinfo); + + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + release_console_sem(); + } + + return 0; +} + +int viafb_resume(struct pci_dev *pdev) +{ + acquire_console_sem(); + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + if (pci_enable_device(pdev)) + goto fail; + pci_set_master(pdev); + + memcpy_toio(viaparinfo->shared->vdev->engine_mmio + 0x100, + viaparinfo->shared->saved_regs, + 0x100 * sizeof(u32)); + + fb_set_suspend(viafbinfo, 0); + +fail: + release_console_sem(); + return 0; +} + +#endif + + int __devinit via_fb_pci_probe(struct viafb_dev *vdev) { u32 default_xres, default_yres; diff --git a/drivers/video/via/viafbdev.h b/drivers/video/via/viafbdev.h index d66f963e930e..29a8c6c769ec 100644 --- a/drivers/video/via/viafbdev.h +++ b/drivers/video/via/viafbdev.h @@ -62,6 +62,9 @@ struct viafb_shared { u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y, u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y, u32 fg_color, u32 bg_color, u8 fill_rop); + + /* For suspend/resume */ + u32 saved_regs[0x100]; }; struct viafb_par { @@ -108,4 +111,6 @@ void via_fb_pci_remove(struct pci_dev *pdev); /* Temporary */ int viafb_init(void); void viafb_exit(void); +int viafb_suspend(struct pci_dev *pdev, pm_message_t state); +int viafb_resume(struct pci_dev *pdev); #endif /* __VIAFBDEV_H__ */ |