linux-kernel-mentees.lists.linuxfoundation.org archive mirror
 help / color / mirror / Atom feed
From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Bjorn Helgaas <bjorn@helgaas.com>,
	Vaibhav Gupta <vaibhav.varodek@gmail.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Sam Ravnborg <sam@ravnborg.org>,
	Paul Mackerras <paulus@samba.org>,
	Russell King <linux@armlinux.org.uk>,
	Andres Salomon <dilinger@queued.net>,
	Antonino Daplas <adaplas@gmail.com>
Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-geode@lists.infradead.org,
	linux-kernel-mentees@lists.linuxfoundation.org,
	linux-arm-kernel@lists.infradead.org
Subject: [Linux-kernel-mentees] [PATCH v3 01/12] fbdev: gxfb: use generic power management
Date: Thu, 20 Aug 2020 00:26:43 +0530	[thread overview]
Message-ID: <20200819185654.151170-2-vaibhavgupta40@gmail.com> (raw)
In-Reply-To: <20200819185654.151170-1-vaibhavgupta40@gmail.com>

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>
---
 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

_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

  reply	other threads:[~2020-08-19 18:59 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200819185901eucas1p2a6c54c905c199e6a04de8477cfa6539e@eucas1p2.samsung.com>
2020-08-19 18:56 ` [Linux-kernel-mentees] [PATCH v3 00/12] video: fbdev: " Vaibhav Gupta
2020-08-19 18:56   ` Vaibhav Gupta [this message]
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 02/12] fbdev: lxfb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 03/12] fbdev: via-core: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 04/12] fbdev: aty: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 05/12] fbdev: aty128fb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 06/12] fbdev: nvidia: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 07/12] fbdev: savagefb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 08/12] fbdev: cyber2000fb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 09/12] fbdev: i740fb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 10/12] fbdev: vt8623fb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 11/12] fbdev: s3fb: " Vaibhav Gupta
2020-08-19 18:56   ` [Linux-kernel-mentees] [PATCH v3 12/12] fbdev: arkfb: " Vaibhav Gupta
2020-09-08 11:37   ` [Linux-kernel-mentees] [PATCH v3 00/12] video: fbdev: " Bartlomiej Zolnierkiewicz

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200819185654.151170-2-vaibhavgupta40@gmail.com \
    --to=vaibhavgupta40@gmail.com \
    --cc=adaplas@gmail.com \
    --cc=b.zolnierkie@samsung.com \
    --cc=bhelgaas@google.com \
    --cc=bjorn@helgaas.com \
    --cc=dilinger@queued.net \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=helgaas@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-fbdev@vger.kernel.org \
    --cc=linux-geode@lists.infradead.org \
    --cc=linux-kernel-mentees@lists.linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=paulus@samba.org \
    --cc=sam@ravnborg.org \
    --cc=vaibhav.varodek@gmail.com \
    --subject='Re: [Linux-kernel-mentees] [PATCH v3 01/12] fbdev: gxfb: use generic power management' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).