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Message-Id: <20200819185654.151170-2-vaibhavgupta40@gmail.com>
Date: Thu, 20 Aug 2020 00:26:43 +0530
From: Vaibhav Gupta <vaibhavgupta40@...il.com>
To: Bjorn Helgaas <helgaas@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Bjorn Helgaas <bjorn@...gaas.com>,
Vaibhav Gupta <vaibhav.varodek@...il.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Sam Ravnborg <sam@...nborg.org>,
Paul Mackerras <paulus@...ba.org>,
Russell King <linux@...linux.org.uk>,
Andres Salomon <dilinger@...ued.net>,
Antonino Daplas <adaplas@...il.com>
Cc: Vaibhav Gupta <vaibhavgupta40@...il.com>,
dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-geode@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-kernel-mentees@...ts.linuxfoundation.org,
Shuah Khan <skhan@...uxfoundation.org>
Subject: [PATCH v3 01/12] 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: Vaibhav Gupta <vaibhavgupta40@...il.com>
---
drivers/video/fbdev/geode/gxfb.h | 5 ----
drivers/video/fbdev/geode/gxfb_core.c | 36 ++++++++++++++------------
drivers/video/fbdev/geode/suspend_gx.c | 4 ---
3 files changed, 20 insertions(+), 25 deletions(-)
diff --git a/drivers/video/fbdev/geode/gxfb.h b/drivers/video/fbdev/geode/gxfb.h
index d2e9c5c8e294..792c111c21e4 100644
--- a/drivers/video/fbdev/geode/gxfb.h
+++ b/drivers/video/fbdev/geode/gxfb.h
@@ -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 {
diff --git a/drivers/video/fbdev/geode/gxfb_core.c b/drivers/video/fbdev/geode/gxfb_core.c
index d38a148d4746..44089b331f91 100644
--- a/drivers/video/fbdev/geode/gxfb_core.c
+++ b/drivers/video/fbdev/geode/gxfb_core.c
@@ -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();
- }
+ 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
diff --git a/drivers/video/fbdev/geode/suspend_gx.c b/drivers/video/fbdev/geode/suspend_gx.c
index 1110a527c35c..8c49d4e98772 100644
--- a/drivers/video/fbdev/geode/suspend_gx.c
+++ b/drivers/video/fbdev/geode/suspend_gx.c
@@ -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
--
2.28.0
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