Commit fa41f287 authored by Vaibhav Gupta's avatar Vaibhav Gupta Committed by Bartlomiej Zolnierkiewicz

fbdev: gxfb: use generic power management

Switch to the new generic framework by updating function signatures and
define a "struct dev_pm_ops" variable to bind PM callbacks. This way we can
remove the legacy .suspend & .resume bindings from "gxfb_driver".

The gxfb_suspend() is designed to function only in the case of Suspend.
Thus, the code was kept inside "if (state.event == PM_EVENT_SUSPEND)"
container. This is because, in the legacy framework, this callback was
invoked even in the event of Freeze and Hibernate. Hence, added the load of
unnecessary function-calls.

The goal can be achieved by binding the callback with only
"gxfb_pm_ops.suspend" in the new framework. This also avoids the step of
checking "if (state.event == PM_EVENT_SUSPEND)" every time the callback is
invoked.
Signed-off-by: default avatarVaibhav Gupta <vaibhavgupta40@gmail.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Bjorn Helgaas <bjorn@helgaas.com>
Cc: Vaibhav Gupta <vaibhav.varodek@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Andres Salomon <dilinger@queued.net>
CC: Antonino Daplas <adaplas@gmail.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819185654.151170-2-vaibhavgupta40@gmail.com
parent ad6f93e9
......@@ -21,7 +21,6 @@ struct gxfb_par {
void __iomem *dc_regs;
void __iomem *vid_regs;
void __iomem *gp_regs;
#ifdef CONFIG_PM
int powered_down;
/* register state, for power management functionality */
......@@ -36,7 +35,6 @@ struct gxfb_par {
uint64_t fp[FP_REG_COUNT];
uint32_t pal[DC_PAL_COUNT];
#endif
};
unsigned int gx_frame_buffer_size(void);
......@@ -49,11 +47,8 @@ void gx_set_dclk_frequency(struct fb_info *info);
void gx_configure_display(struct fb_info *info);
int gx_blank_display(struct fb_info *info, int blank_mode);
#ifdef CONFIG_PM
int gx_powerdown(struct fb_info *info);
int gx_powerup(struct fb_info *info);
#endif
/* Graphics Processor registers (table 6-23 from the data book) */
enum gp_registers {
......
......@@ -322,17 +322,14 @@ static struct fb_info *gxfb_init_fbinfo(struct device *dev)
return info;
}
#ifdef CONFIG_PM
static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state)
static int __maybe_unused gxfb_suspend(struct device *dev)
{
struct fb_info *info = pci_get_drvdata(pdev);
struct fb_info *info = dev_get_drvdata(dev);
if (state.event == PM_EVENT_SUSPEND) {
console_lock();
gx_powerdown(info);
fb_set_suspend(info, 1);
console_unlock();
}
/* there's no point in setting PCI states; we emulate PCI, so
* we don't end up getting power savings anyways */
......@@ -340,9 +337,9 @@ static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state)
return 0;
}
static int gxfb_resume(struct pci_dev *pdev)
static int __maybe_unused gxfb_resume(struct device *dev)
{
struct fb_info *info = pci_get_drvdata(pdev);
struct fb_info *info = dev_get_drvdata(dev);
int ret;
console_lock();
......@@ -356,7 +353,6 @@ static int gxfb_resume(struct pci_dev *pdev)
console_unlock();
return 0;
}
#endif
static int gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
......@@ -467,15 +463,23 @@ static const struct pci_device_id gxfb_id_table[] = {
MODULE_DEVICE_TABLE(pci, gxfb_id_table);
static const struct dev_pm_ops gxfb_pm_ops = {
#ifdef CONFIG_PM_SLEEP
.suspend = gxfb_suspend,
.resume = gxfb_resume,
.freeze = NULL,
.thaw = gxfb_resume,
.poweroff = NULL,
.restore = gxfb_resume,
#endif
};
static struct pci_driver gxfb_driver = {
.name = "gxfb",
.id_table = gxfb_id_table,
.probe = gxfb_probe,
.remove = gxfb_remove,
#ifdef CONFIG_PM
.suspend = gxfb_suspend,
.resume = gxfb_resume,
#endif
.driver.pm = &gxfb_pm_ops,
};
#ifndef MODULE
......
......@@ -11,8 +11,6 @@
#include "gxfb.h"
#ifdef CONFIG_PM
static void gx_save_regs(struct gxfb_par *par)
{
int i;
......@@ -259,5 +257,3 @@ int gx_powerup(struct fb_info *info)
par->powered_down = 0;
return 0;
}
#endif
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