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video: hyperv_fb: Add the support of hibernation 

This patch depends on the vmbus side change of the definition of
struct hv_driver.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dexuan Cui 2019-09-11 23:34:10 +00:00 committed by Sasha Levin
parent 56fb105859
commit 1ecf302021
1 changed files with 59 additions and 0 deletions
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59
drivers/video/fbdev/hyperv_fb.c
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@ -34,6 +34,7 @@
#include <linux/fb.h>
#include <linux/pci.h>
#include <linux/efi.h>
#include <linux/console.h>
#include <linux/hyperv.h>
@ -211,6 +212,7 @@ struct hvfb_par {
struct delayed_work dwork;
bool update;
bool update_saved; /* The value of 'update' before hibernation */
u32 pseudo_palette[16];
u8 init_buf[MAX_VMBUS_PKT_SIZE];
@ -878,6 +880,61 @@ static int hvfb_remove(struct hv_device *hdev)
return 0;
}
static int hvfb_suspend(struct hv_device *hdev)
{
struct fb_info *info = hv_get_drvdata(hdev);
struct hvfb_par *par = info->par;
console_lock();
/* 1 means do suspend */
fb_set_suspend(info, 1);
cancel_delayed_work_sync(&par->dwork);
par->update_saved = par->update;
par->update = false;
par->fb_ready = false;
vmbus_close(hdev->channel);
console_unlock();
return 0;
}
static int hvfb_resume(struct hv_device *hdev)
{
struct fb_info *info = hv_get_drvdata(hdev);
struct hvfb_par *par = info->par;
int ret;
console_lock();
ret = synthvid_connect_vsp(hdev);
if (ret != 0)
goto out;
ret = synthvid_send_config(hdev);
if (ret != 0) {
vmbus_close(hdev->channel);
goto out;
}
par->fb_ready = true;
par->update = par->update_saved;
schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY);
/* 0 means do resume */
fb_set_suspend(info, 0);
out:
console_unlock();
return ret;
}
static const struct pci_device_id pci_stub_id_table[] = {
{
@ -901,6 +958,8 @@ static struct hv_driver hvfb_drv = {
.id_table = id_table,
.probe = hvfb_probe,
.remove = hvfb_remove,
.suspend = hvfb_suspend,
.resume = hvfb_resume,
.driver = {
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},