diff mbox series

[1/3] asus-wmi: Add panel overdrive functionality

Message ID 20210704222148.880848-2-luke@ljones.dev (mailing list archive)
State Changes Requested, archived
Headers show
Series Support for ASUS egpu, dpgu disable, panel overdrive | expand

Commit Message

Luke D. Jones July 4, 2021, 10:21 p.m. UTC 
Some ASUS ROG laptops have the ability to drive the display panel
a a higher rate to eliminate or reduce ghosting.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
---
 drivers/platform/x86/asus-wmi.c            | 92 ++++++++++++++++++++++
 include/linux/platform_data/x86/asus-wmi.h |  1 +
 2 files changed, 93 insertions(+)

Comments

kernel test robot July 4, 2021, 11:48 p.m. UTC | #1 
Hi "Luke,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.13 next-20210701]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Luke-D-Jones/Support-for-ASUS-egpu-dpgu-disable-panel-overdrive/20210705-062341
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 28e92f990337b8b4c5fdec47667f8b96089c503e
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/b46e8ec7f42ce4b644c43f40218fe853d078f098
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Luke-D-Jones/Support-for-ASUS-egpu-dpgu-disable-panel-overdrive/20210705-062341
        git checkout b46e8ec7f42ce4b644c43f40218fe853d078f098
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/platform/x86/asus-wmi.c: In function 'panel_od_check_present':
>> drivers/platform/x86/asus-wmi.c:1242:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    1242 |  if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
         |  ^~
   drivers/platform/x86/asus-wmi.c:1244:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    1244 |   asus->panel_overdrive = result & ASUS_WMI_DSTS_STATUS_BIT;
         |   ^~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PHY_SPARX5_SERDES
   Depends on (ARCH_SPARX5 || COMPILE_TEST && OF && HAS_IOMEM
   Selected by
   - SPARX5_SWITCH && NETDEVICES && ETHERNET && NET_VENDOR_MICROCHIP && NET_SWITCHDEV && HAS_IOMEM


vim +/if +1242 drivers/platform/x86/asus-wmi.c

  1226	
  1227	/* Panel Overdrive ************************************************************/
  1228	static int panel_od_check_present(struct asus_wmi *asus)
  1229	{
  1230		u32 result;
  1231		int err;
  1232	
  1233		asus->panel_overdrive_available = false;
  1234	
  1235		err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_PANEL_OD, &result);
  1236		if (err) {
  1237			if (err == -ENODEV)
  1238				return 0;
  1239			return err;
  1240		}
  1241	
> 1242		if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
  1243			asus->panel_overdrive_available = true;
  1244			asus->panel_overdrive = result & ASUS_WMI_DSTS_STATUS_BIT;
  1245	
  1246		return 0;
  1247	}
  1248	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Hans de Goede July 6, 2021, 10:07 a.m. UTC | #2 
Hi,

Thank you for your patches, I've added several remarks inline (below);

On 7/5/21 12:21 AM, Luke D. Jones wrote:
> Some ASUS ROG laptops have the ability to drive the display panel
> a a higher rate to eliminate or reduce ghosting.
> 
> Signed-off-by: Luke D. Jones <luke@ljones.dev>
> ---
>  drivers/platform/x86/asus-wmi.c            | 92 ++++++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h |  1 +
>  2 files changed, 93 insertions(+)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index ebaeb7bb80f5..2468076d6cd8 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -216,6 +216,9 @@ struct asus_wmi {
>  	// The RSOC controls the maximum charging percentage.
>  	bool battery_rsoc_available;
>  
> +	bool panel_overdrive_available;
> +	u8 panel_overdrive;
> +
>  	struct hotplug_slot hotplug_slot;
>  	struct mutex hotplug_lock;
>  	struct mutex wmi_lock;
> @@ -1221,6 +1224,87 @@ static int asus_wmi_rfkill_init(struct asus_wmi *asus)
>  	return result;
>  }
>  
> +/* Panel Overdrive ************************************************************/
> +static int panel_od_check_present(struct asus_wmi *asus)
> +{
> +	u32 result;
> +	int err;
> +
> +	asus->panel_overdrive_available = false;
> +
> +	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_PANEL_OD, &result);
> +	if (err) {
> +		if (err == -ENODEV)
> +			return 0;
> +		return err;
> +	}
> +
> +	if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
> +		asus->panel_overdrive_available = true;
> +		asus->panel_overdrive = result & ASUS_WMI_DSTS_STATUS_BIT;

As the kernel-test-robot pointed out this if is missing { } around the
2 statements which should only be executed if the condition is true.

> +
> +	return 0;
> +}
> +
> +static int panel_od_write(struct asus_wmi *asus)
> +{
> +	int err;
> +	u8 value;
> +	u32 retval;
> +
> +	value = asus->panel_overdrive;
> +
> +	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PANEL_OD, value, &retval);
> +
> +	sysfs_notify(&asus->platform_device->dev.kobj, NULL,
> +			"panel_od");

Please make this a single line.

> +
> +	if (err) {
> +		pr_warn("Failed to set panel overdrive: %d\n", err);
> +		return err;
> +	}
> +
> +	if (retval > 1 || retval < 0) {
> +		pr_warn("Failed to set panel overdrive (retval): 0x%x\n",
> +			retval);

Please make this a single line too.

> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static ssize_t panel_od_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	u8 mode = asus->panel_overdrive;
> +
> +	return scnprintf(buf, PAGE_SIZE, "%d\n", mode);
> +}
> +
> +static ssize_t panel_od_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	int result;
> +	u8 overdrive;
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +
> +	result = kstrtou8(buf, 10, &overdrive);
> +	if (result < 0)
> +		return result;
> +
> +	if (overdrive > 1 || overdrive < 0)

An u8 can never be < 0, so please drop that check
(it will likely trigger compiler warnings in some cases).

> +		return -EINVAL;
> +
> +	asus->panel_overdrive = overdrive;
> +	panel_od_write(asus);
> +
> +	return count;
> +}
> +
> +static DEVICE_ATTR_RW(panel_od);
> +
>  /* Quirks *********************************************************************/
>  
>  static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
> @@ -2332,6 +2416,7 @@ static struct attribute *platform_attributes[] = {
>  	&dev_attr_als_enable.attr,
>  	&dev_attr_fan_boost_mode.attr,
>  	&dev_attr_throttle_thermal_policy.attr,
> +	&dev_attr_panel_od.attr,
>  	NULL
>  };
>  
> @@ -2357,6 +2442,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
>  		ok = asus->fan_boost_mode_available;
>  	else if (attr == &dev_attr_throttle_thermal_policy.attr)
>  		ok = asus->throttle_thermal_policy_available;
> +	else if (attr == &dev_attr_panel_od.attr)
> +		ok = asus->panel_overdrive_available;
>  
>  	if (devid != -1)
>  		ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
> @@ -2622,6 +2709,10 @@ static int asus_wmi_add(struct platform_device *pdev)
>  	else
>  		throttle_thermal_policy_set_default(asus);
>  
> +	err = panel_od_check_present(asus);
> +	if (err)
> +		goto fail_panel_od;
> +
>  	err = asus_wmi_sysfs_init(asus->platform_device);
>  	if (err)
>  		goto fail_sysfs;
> @@ -2709,6 +2800,7 @@ static int asus_wmi_add(struct platform_device *pdev)
>  fail_throttle_thermal_policy:
>  fail_fan_boost_mode:
>  fail_platform:
> +fail_panel_od:
>  	kfree(asus);
>  	return err;
>  }
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index 2f274cf52805..428aea701c7b 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -61,6 +61,7 @@
>  #define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY 0x00120075
>  
>  /* Misc */
> +#define ASUS_WMI_DEVID_PANEL_OD		0x00050019
>  #define ASUS_WMI_DEVID_CAMERA		0x00060013
>  #define ASUS_WMI_DEVID_LID_FLIP		0x00060062
>  
> 

Otherwise this looks good to me,

Regards,

Hans
Hans de Goede July 6, 2021, 10:08 a.m. UTC | #3 
Hi,

One more remark inline:

On 7/5/21 12:21 AM, Luke D. Jones wrote:
> Some ASUS ROG laptops have the ability to drive the display panel
> a a higher rate to eliminate or reduce ghosting.
> 
> Signed-off-by: Luke D. Jones <luke@ljones.dev>
> ---
>  drivers/platform/x86/asus-wmi.c            | 92 ++++++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h |  1 +
>  2 files changed, 93 insertions(+)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index ebaeb7bb80f5..2468076d6cd8 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c

<snip>

> +static ssize_t panel_od_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	u8 mode = asus->panel_overdrive;
> +
> +	return scnprintf(buf, PAGE_SIZE, "%d\n", mode);

As Barnabás pointed out in his review of patch 2/3, please
use sysfs_emit here.

Regards,

Hans
diff mbox series

Patch

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index ebaeb7bb80f5..2468076d6cd8 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -216,6 +216,9 @@  struct asus_wmi {
 	// The RSOC controls the maximum charging percentage.
 	bool battery_rsoc_available;
 
+	bool panel_overdrive_available;
+	u8 panel_overdrive;
+
 	struct hotplug_slot hotplug_slot;
 	struct mutex hotplug_lock;
 	struct mutex wmi_lock;
@@ -1221,6 +1224,87 @@  static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 	return result;
 }
 
+/* Panel Overdrive ************************************************************/
+static int panel_od_check_present(struct asus_wmi *asus)
+{
+	u32 result;
+	int err;
+
+	asus->panel_overdrive_available = false;
+
+	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_PANEL_OD, &result);
+	if (err) {
+		if (err == -ENODEV)
+			return 0;
+		return err;
+	}
+
+	if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
+		asus->panel_overdrive_available = true;
+		asus->panel_overdrive = result & ASUS_WMI_DSTS_STATUS_BIT;
+
+	return 0;
+}
+
+static int panel_od_write(struct asus_wmi *asus)
+{
+	int err;
+	u8 value;
+	u32 retval;
+
+	value = asus->panel_overdrive;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PANEL_OD, value, &retval);
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL,
+			"panel_od");
+
+	if (err) {
+		pr_warn("Failed to set panel overdrive: %d\n", err);
+		return err;
+	}
+
+	if (retval > 1 || retval < 0) {
+		pr_warn("Failed to set panel overdrive (retval): 0x%x\n",
+			retval);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static ssize_t panel_od_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+	u8 mode = asus->panel_overdrive;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", mode);
+}
+
+static ssize_t panel_od_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result;
+	u8 overdrive;
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou8(buf, 10, &overdrive);
+	if (result < 0)
+		return result;
+
+	if (overdrive > 1 || overdrive < 0)
+		return -EINVAL;
+
+	asus->panel_overdrive = overdrive;
+	panel_od_write(asus);
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(panel_od);
+
 /* Quirks *********************************************************************/
 
 static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
@@ -2332,6 +2416,7 @@  static struct attribute *platform_attributes[] = {
 	&dev_attr_als_enable.attr,
 	&dev_attr_fan_boost_mode.attr,
 	&dev_attr_throttle_thermal_policy.attr,
+	&dev_attr_panel_od.attr,
 	NULL
 };
 
@@ -2357,6 +2442,8 @@  static umode_t asus_sysfs_is_visible(struct kobject *kobj,
 		ok = asus->fan_boost_mode_available;
 	else if (attr == &dev_attr_throttle_thermal_policy.attr)
 		ok = asus->throttle_thermal_policy_available;
+	else if (attr == &dev_attr_panel_od.attr)
+		ok = asus->panel_overdrive_available;
 
 	if (devid != -1)
 		ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
@@ -2622,6 +2709,10 @@  static int asus_wmi_add(struct platform_device *pdev)
 	else
 		throttle_thermal_policy_set_default(asus);
 
+	err = panel_od_check_present(asus);
+	if (err)
+		goto fail_panel_od;
+
 	err = asus_wmi_sysfs_init(asus->platform_device);
 	if (err)
 		goto fail_sysfs;
@@ -2709,6 +2800,7 @@  static int asus_wmi_add(struct platform_device *pdev)
 fail_throttle_thermal_policy:
 fail_fan_boost_mode:
 fail_platform:
+fail_panel_od:
 	kfree(asus);
 	return err;
 }
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 2f274cf52805..428aea701c7b 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -61,6 +61,7 @@ 
 #define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY 0x00120075
 
 /* Misc */
+#define ASUS_WMI_DEVID_PANEL_OD		0x00050019
 #define ASUS_WMI_DEVID_CAMERA		0x00060013
 #define ASUS_WMI_DEVID_LID_FLIP		0x00060062