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fbdev: gxfb: use generic power management

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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: Vaibhav 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: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819185654.151170-2-vaibhavgupta40@gmail.com
This commit is contained in:
Vaibhav Gupta
2020-08-20 00:26:43 +05:30
committed by Bartlomiej Zolnierkiewicz
parent ad6f93e9cd
commit fa41f28774
3 changed files with 20 additions and 25 deletions
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5
drivers/video/fbdev/geode/gxfb.h
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@@ -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 {