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From: Hans de Goede <hdegoede@redhat.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-pwm@vger.kernel.org,
	intel-gfx <intel-gfx@lists.freedesktop.org>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	linux-acpi@vger.kernel.org, dri-devel@lists.freedesktop.org,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Mika Westerberg" <mika.westerberg@linux.intel.com>,
	"Len Brown" <lenb@kernel.org>
Subject: Re: [Intel-gfx] [PATCH v5 06/16] pwm: lpss: Use pwm_lpss_apply() when restoring state on resume
Date: Sun, 2 Aug 2020 22:51:34 +0200
Message-ID: <0e8595ff-2ebb-76a6-a43d-d670154c0352@redhat.com> (raw)
In-Reply-To: <20200729081218.GH3703480@smile.fi.intel.com>

Hi,

On 7/29/20 10:12 AM, Andy Shevchenko wrote:
> On Tue, Jul 28, 2020 at 09:55:22PM +0200, Hans de Goede wrote:
>> On 7/28/20 8:57 PM, Andy Shevchenko wrote:
>>> On Fri, Jul 17, 2020 at 03:37:43PM +0200, Hans de Goede wrote:
> 
> ...
> 
>>> Maybe I'm too picky, but I would go even further and split apply to two versions
>>>
>>> static int pwm_lpss_apply_on_resume(struct pwm_chip *chip, struct pwm_device *pwm,
>>> 			  const struct pwm_state *state)
>>>>    {
>>>>    	struct pwm_lpss_chip *lpwm = to_lpwm(chip);
>>>>    	if (state->enabled)
>>>>    		return pwm_lpss_prepare_enable(lpwm, pwm, state, !pwm_is_enabled(pwm));
>>>>    	if (pwm_is_enabled(pwm)) {
>>>>    		pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE);
>>>>    	return 0;
>>>>    }
>>>
>>> and another one for !from_resume.
>>
>> It is a bit picky :) But that is actually not a bad idea, although I would write
>> it like this for more symmetry with the normal (not on_resume) apply version,
>> while at it I also renamed the function:
>>
>> /*
>>   * This is a mirror of pwm_lpss_apply() without pm_runtime reference handling
>>   * for restoring the PWM state on resume.
>>   */
>> static int pwm_lpss_restore_state(struct pwm_chip *chip, struct pwm_device *pwm,
>>                                    const struct pwm_state *state)
>> {
>>     	struct pwm_lpss_chip *lpwm = to_lpwm(chip);
>> 	int ret = 0;
>>
>>     	if (state->enabled)
>>     		ret = pwm_lpss_prepare_enable(lpwm, pwm, state, !pwm_is_enabled(pwm));
>>     	else if (pwm_is_enabled(pwm))
>>     		pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE);
>>
>>     	return ret;
>> }
>>
>> Would that work for you?
> 
> Yes.

Ok, I've added the suggested/discussed helper in my personal tree. Is it ok
if I add your Reviewed-by with that change in place. This is the last unreviewed
bit, so I would rather not respin the series just for this (there will be one
more respin when I rebase it on 5.9-rc1).

If you want to check out what the patch looks like now, the new version from
my personal tree is here:

https://github.com/jwrdegoede/linux-sunxi/commit/e4869830d88bb8cb8251718e0086ac189abc0f56

Regards,

Hans

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  reply index

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17 13:37 [Intel-gfx] [PATCH v5 00/16] acpi/pwm/i915: Convert pwm-crc and i915 driver's PWM code to use the atomic PWM API Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 01/16] ACPI / LPSS: Resume Cherry Trail PWM controller in no-irq phase Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 02/16] ACPI / LPSS: Save Cherry Trail PWM ctx registers only once (at activation) Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 03/16] pwm: lpss: Fix off by one error in base_unit math in pwm_lpss_prepare() Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 04/16] pwm: lpss: Add range limit check for the base_unit register value Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 05/16] pwm: lpss: Add pwm_lpss_prepare_enable() helper Hans de Goede
2020-07-28 18:45   ` Andy Shevchenko
2020-07-28 19:49     ` Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 06/16] pwm: lpss: Use pwm_lpss_apply() when restoring state on resume Hans de Goede
2020-07-28 18:57   ` Andy Shevchenko
2020-07-28 19:55     ` Hans de Goede
2020-07-29  8:12       ` Andy Shevchenko
2020-08-02 20:51         ` Hans de Goede [this message]
2020-08-03  8:41           ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 07/16] pwm: crc: Fix period / duty_cycle times being off by a factor of 256 Hans de Goede
2020-07-28 19:36   ` Andy Shevchenko
2020-07-28 20:00     ` Hans de Goede
2020-07-29  8:13   ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 08/16] pwm: crc: Fix off-by-one error in the clock-divider calculations Hans de Goede
2020-07-29 10:28   ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 09/16] pwm: crc: Fix period changes not having any effect Hans de Goede
2020-07-29 10:30   ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 10/16] pwm: crc: Enable/disable PWM output on enable/disable Hans de Goede
2020-07-29 10:32   ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 11/16] pwm: crc: Implement apply() method to support the new atomic PWM API Hans de Goede
2020-07-29 10:51   ` Andy Shevchenko
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 12/16] pwm: crc: Implement get_state() method Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 13/16] drm/i915: panel: Add get_vbt_pwm_freq() helper Hans de Goede
2020-07-17 13:37 ` [Intel-gfx] [PATCH v5 14/16] drm/i915: panel: Honor the VBT PWM frequency for devs with an external PWM controller Hans de Goede
2020-07-17 13:44 ` [Intel-gfx] [PATCH v5 15/16] drm/i915: panel: Honor the VBT PWM min setting " Hans de Goede
2020-07-17 13:44   ` [Intel-gfx] [PATCH v5 16/16] drm/i915: panel: Use atomic PWM API " Hans de Goede
2020-07-27  7:41 ` [Intel-gfx] [PATCH v5 00/16] acpi/pwm/i915: Convert pwm-crc and i915 driver's PWM code to use the atomic PWM API Thierry Reding
2020-07-29  8:23   ` Andy Shevchenko
2020-07-29  9:32     ` Hans de Goede
2020-07-30  9:26       ` Thierry Reding
2020-08-01 14:33         ` Hans de Goede
2020-07-29 10:54 ` Andy Shevchenko
2020-08-01 14:38   ` Hans de Goede
2020-08-02 11:25     ` Andy Shevchenko
2020-08-02 19:43       ` Hans de Goede

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