From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org, plaes@plaes.org,
icenowy@aosc.io,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
jernej.skrabec@siol.net, devicetree@vger.kernel.org,
thierry.reding@gmail.com
Subject: Re: [PATCH v5 02/12] drm/panel: lvds: Add support for the power-supply property
Date: Fri, 22 Dec 2017 14:09:32 +0200 [thread overview]
Message-ID: <2325464.U6vNVgOjSP@avalon> (raw)
In-Reply-To: <0c0819bdf88fa948188df95e57a10820a8a4548d.1513854122.git-series.maxime.ripard@free-electrons.com>
Hi Maxime,
Thank you for the patch.
On Thursday, 21 December 2017 13:02:28 EET Maxime Ripard wrote:
> A significant number of panels need to power up a regulator in order to
> operate properly. Add support for the power-supply property to enable and
> disable such a regulator whenever needed.
>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> drivers/gpu/drm/panel/panel-lvds.c | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-lvds.c
> b/drivers/gpu/drm/panel/panel-lvds.c index e2d57c01200b..57e38a9e7ab4
> 100644
> --- a/drivers/gpu/drm/panel/panel-lvds.c
> +++ b/drivers/gpu/drm/panel/panel-lvds.c
> @@ -17,6 +17,7 @@
> #include <linux/module.h>
> #include <linux/of_platform.h>
> #include <linux/platform_device.h>
> +#include <linux/regulator/consumer.h>
> #include <linux/slab.h>
>
> #include <drm/drmP.h>
> @@ -39,6 +40,7 @@ struct panel_lvds {
> bool data_mirror;
>
> struct backlight_device *backlight;
> + struct regulator *supply;
>
> struct gpio_desc *enable_gpio;
> struct gpio_desc *reset_gpio;
> @@ -69,6 +71,9 @@ static int panel_lvds_unprepare(struct drm_panel *panel)
> if (lvds->enable_gpio)
> gpiod_set_value_cansleep(lvds->enable_gpio, 0);
>
> + if (lvds->supply)
> + regulator_disable(lvds->supply);
> +
> return 0;
> }
>
> @@ -76,6 +81,17 @@ static int panel_lvds_prepare(struct drm_panel *panel)
> {
> struct panel_lvds *lvds = to_panel_lvds(panel);
>
> + if (lvds->supply) {
> + int err;
> +
> + err = regulator_enable(lvds->supply);
> + if (err < 0) {
> + dev_err(lvds->dev, "failed to enable supply: %d\n",
> + err);
> + return err;
> + }
> + }
> +
> if (lvds->enable_gpio)
> gpiod_set_value_cansleep(lvds->enable_gpio, 1);
>
> @@ -196,6 +212,13 @@ static int panel_lvds_probe(struct platform_device
> *pdev) if (ret < 0)
> return ret;
>
> + lvds->supply = devm_regulator_get_optional(lvds->dev, "power");
> + if (IS_ERR(lvds->supply)) {
> + ret = PTR_ERR(lvds->supply);
> + dev_err(lvds->dev, "failed to request regulator: %d\n", ret);
> + return ret;
> + }
> +
> /* Get GPIOs and backlight controller. */
> lvds->enable_gpio = devm_gpiod_get_optional(lvds->dev, "enable",
> GPIOD_OUT_LOW);
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2017-12-22 12:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-21 11:02 [PATCH v5 00/12] drm/sun4i: Add A83t LVDS support Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 01/12] dt-bindings: panel: lvds: Document power-supply property Maxime Ripard
2017-12-22 12:08 ` Laurent Pinchart
2018-01-04 19:44 ` Maxime Ripard
[not found] ` <20180104194436.reka6nw5hf32o4p3-ZC1Zs529Oq4@public.gmane.org>
2018-01-04 20:05 ` Laurent Pinchart
2017-12-21 11:02 ` [PATCH v5 02/12] drm/panel: lvds: Add support for the " Maxime Ripard
2017-12-22 12:09 ` Laurent Pinchart [this message]
2017-12-21 11:02 ` [PATCH v5 03/12] dt-bindings: display: sun4i-drm: Add LVDS properties Maxime Ripard
[not found] ` <ddbde28fe2e4f21412974e4c69fbfe1c5ff9383f.1513854122.git-series.maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-30 11:45 ` Jernej Škrabec
2018-01-04 19:03 ` Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 04/12] dt-bindings: display: sun4i-drm: Add A83T pipeline Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 05/12] drm/sun4i: Force the mixer rate at 150MHz Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 06/12] drm/sun4i: Create minimal multipliers and dividers Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 07/12] drm/sun4i: Add LVDS support Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 08/12] drm/sun4i: Add A83T support Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 09/12] ARM: dts: sun8i: a83t: Add display pipeline Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 10/12] ARM: dts: sun8i: a83t: Enable the PWM Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 11/12] ARM: dts: sun8i: a83t: Add LVDS pins group Maxime Ripard
2017-12-21 11:02 ` [PATCH v5 12/12] ARM: dts: sun8i: a711: Enable the LCD Maxime Ripard
2018-01-05 9:39 ` [PATCH v5 00/12] drm/sun4i: Add A83t LVDS support Maxime Ripard
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