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From: "Barnabás Pőcze" <pobrn@protonmail.com>
To: Roderick Colenbrander <roderick@gaikai.com>
Cc: Jiri Kosina <jikos@kernel.org>,
	Benjamin Tissoires <benjamin.tissoires@redhat.com>,
	"linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
	Chris Ye <lzye@google.com>,
	Roderick Colenbrander <roderick.colenbrander@sony.com>
Subject: Re: [PATCH 11/13] HID: playstation: add DualSense player LEDs support.
Date: Sun, 27 Dec 2020 14:27:32 +0000	[thread overview]
Message-ID: <8ROOgrBVvXav7SOnZgBVtvZ4QKubyktYJ2WsauoAH22lewKj2-Rp9a-uEZyxhItvF3Q7pp8hKZ4etl0jgiD-G3XkbL1aM9z8cRNsHHmGN9A=@protonmail.com> (raw)
In-Reply-To: <20201219062336.72568-12-roderick@gaikai.com>

Hi


2020. december 19., szombat 7:23 keltezéssel, Roderick Colenbrander írta:

> [...]
> diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
> index ad8eedd3d2bf..384449e3095d 100644
> [...]
> +static enum led_brightness dualsense_player_led_get_brightness(struct led_classdev *led)
> +{
> +	struct hid_device *hdev = to_hid_device(led->dev->parent);
> +	struct dualsense *ds = hid_get_drvdata(hdev);
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(ds->player_leds); i++) {
> +		if (&ds->player_leds[i] == led)
> +			return !!(ds->player_leds_state & BIT(i));
> +	}

Is there any reason why

```
  !!(ds->player_leds_state & BIT( led - ds->player_leds ))
```

or something similar is not used? Or am I missing something that prevents this
from working?

Furthermore, I don't quite see the purpose of this function. The LED core
can handle if no brightness_get() callback is provided. And since this
function returns just a cached value, I fail to see how it is different from
the default behaviour of the LED core, which is returning the last brightness
value. Am I missing something?


> +
> +	return LED_OFF;
> +}
> +
> +static void dualsense_player_led_set_brightness(struct led_classdev *led, enum led_brightness value)
> +{
> +	struct hid_device *hdev = to_hid_device(led->dev->parent);
> +	struct dualsense *ds = hid_get_drvdata(hdev);
> +	uint8_t player_leds_state = 0;
> +	unsigned long flags;
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(ds->player_leds); i++)
> +		player_leds_state |= (ds->player_leds[i].brightness << i);
> +

I believe this could be simplified as well using the fact that
`led - ds->player_leds` gives the index of the LED.


> +	spin_lock_irqsave(&ds->base.lock, flags);
> +	ds->player_leds_state = player_leds_state;
> +	ds->update_player_leds = true;
> +	spin_unlock_irqrestore(&ds->base.lock, flags);
> +
> +	schedule_work(&ds->output_worker);
> +}
> [...]


Regards,
Barnabás Pőcze

  parent reply	other threads:[~2020-12-27 14:28 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-19  6:23 [PATCH 00/13] HID: new driver for PS5 'DualSense' controller Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 01/13] HID: playstation: initial DualSense USB support Roderick Colenbrander
2020-12-27 16:23   ` Barnabás Pőcze
2020-12-27 23:04     ` Roderick Colenbrander
2020-12-29 19:12       ` Barnabás Pőcze
2020-12-31  0:08   ` Barnabás Pőcze
2020-12-31  1:08     ` Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 02/13] HID: playstation: use DualSense MAC address as unique identifier Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 03/13] HID: playstation: add DualSense battery support Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 04/13] HID: playstation: add DualSense touchpad support Roderick Colenbrander
2020-12-26  2:14   ` Samuel Čavoj
2020-12-26 22:27     ` Roderick Colenbrander
2020-12-29 19:49   ` Barnabás Pőcze
2020-12-29 21:44     ` Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 05/13] HID: playstation: add DualSense accelerometer and gyroscope support Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 06/13] HID: playstation: track devices in list Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 07/13] HID: playstation: add DualSense Bluetooth support Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 08/13] HID: playstation: add DualSense classic rumble support Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 09/13] HID: playstation: add DualSense lightbar support Roderick Colenbrander
2020-12-27 14:41   ` Barnabás Pőcze
2020-12-28 21:26     ` Roderick Colenbrander
2020-12-29 18:59       ` Barnabás Pőcze
2020-12-29 19:54         ` Roderick Colenbrander
2020-12-29 20:22           ` Barnabás Pőcze
2020-12-19  6:23 ` [PATCH 10/13] HID: playstation: add microphone mute support for DualSense Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 11/13] HID: playstation: add DualSense player LEDs support Roderick Colenbrander
2020-12-26 19:27   ` Samuel Čavoj
2020-12-26 23:07     ` Roderick Colenbrander
2020-12-27 14:27   ` Barnabás Pőcze [this message]
2020-12-28 22:02     ` Roderick Colenbrander
2020-12-29 18:49       ` Barnabás Pőcze
2020-12-19  6:23 ` [PATCH 12/13] HID: playstation: DualSense set LEDs to default player id Roderick Colenbrander
2020-12-27  0:08   ` Samuel Čavoj
2020-12-27 23:07     ` Roderick Colenbrander
2020-12-19  6:23 ` [PATCH 13/13] HID: playstation: report DualSense hardware and firmware version Roderick Colenbrander
2020-12-27 17:06   ` Barnabás Pőcze
2020-12-27 22:21     ` Roderick Colenbrander
2020-12-27 22:27       ` Roderick Colenbrander
2020-12-27 22:37         ` Barnabás Pőcze
2020-12-28 22:45           ` Roderick Colenbrander
2020-12-29 15:10             ` Barnabás Pőcze
2020-12-19  8:38 ` [PATCH 00/13] HID: new driver for PS5 'DualSense' controller Bastien Nocera
2020-12-19 22:39   ` Roderick.Colenbrander

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