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From: Steven Price <steven.price@arm.com>
To: "Clément Péron" <peron.clem@gmail.com>,
	"Rob Herring" <robh@kernel.org>,
	"Tomeu Vizoso" <tomeu.vizoso@collabora.com>,
	"Alyssa Rosenzweig" <alyssa.rosenzweig@collabora.com>,
	"Viresh Kumar" <vireshk@kernel.org>, "Nishanth Menon" <nm@ti.com>,
	"Stephen Boyd" <sboyd@kernel.org>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Chen-Yu Tsai" <wens@csie.org>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 11/15] drm/panfrost: set devfreq clock name
Date: Thu, 28 May 2020 14:23:04 +0100	[thread overview]
Message-ID: <8bc659b4-dbf9-5ae6-a677-937cab6bd798@arm.com> (raw)
In-Reply-To: <20200510165538.19720-12-peron.clem@gmail.com>

On 10/05/2020 17:55, Clément Péron wrote:
> Some SoCs have  several clocks defined and the OPP core
> needs to know the exact name of the clk to use.
> 
> Set the clock name to "core".
> 
> Signed-off-by: Clément Péron <peron.clem@gmail.com>

This is unfortunately a regression for the RK3288. The device tree 
binding doesn't require "clock-names", and for the RK3288 it currently 
isn't specified. So this breaks the platform.

Adding the "clock-names" to the device tree 'fixes' it, but we really 
need to keep backwards compatibility.

Steve

> ---
>   drivers/gpu/drm/panfrost/panfrost_devfreq.c | 13 +++++++++++++
>   drivers/gpu/drm/panfrost/panfrost_devfreq.h |  1 +
>   2 files changed, 14 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 9ffea0d4a087..6bf3541b4d53 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -103,6 +103,14 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>   
>   	spin_lock_init(&pfdevfreq->lock);
>   
> +	opp_table = dev_pm_opp_set_clkname(dev, "core");
> +	if (IS_ERR(opp_table)) {
> +		ret = PTR_ERR(opp_table);
> +		goto err_fini;
> +	}
> +
> +	pfdevfreq->clkname_opp_table = opp_table;
> +
>   	opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
>   					      pfdev->comp->num_supplies);
>   	if (IS_ERR(opp_table)) {
> @@ -176,6 +184,11 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev)
>   		dev_pm_opp_put_regulators(pfdevfreq->regulators_opp_table);
>   		pfdevfreq->regulators_opp_table = NULL;
>   	}
> +
> +	if (pfdevfreq->clkname_opp_table) {
> +		dev_pm_opp_put_clkname(pfdevfreq->clkname_opp_table);
> +		pfdevfreq->clkname_opp_table = NULL;
> +	}
>   }
>   
>   void panfrost_devfreq_resume(struct panfrost_device *pfdev)
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
> index 347cde4786cf..1f2475e1d034 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
> @@ -16,6 +16,7 @@ struct panfrost_device;
>   struct panfrost_devfreq {
>   	struct devfreq *devfreq;
>   	struct opp_table *regulators_opp_table;
> +	struct opp_table *clkname_opp_table;
>   	struct thermal_cooling_device *cooling;
>   	bool opp_of_table_added;
>   
> 

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  reply	other threads:[~2020-05-28 13:23 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-10 16:55 [PATCH 00/15][RFC] Add regulator devfreq support to Panfrost Clément Péron
2020-05-10 16:55 ` [PATCH 01/15] drm/panfrost: avoid static declaration Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 02/15] drm/panfrost: clean headers in devfreq Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 03/15] drm/panfrost: don't use pfdevfreq.busy_count to know if hw is idle Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 04/15] drm/panfrost: introduce panfrost_devfreq struct Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 05/15] drm/panfrost: use spinlock instead of atomic Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-29 12:20   ` Robin Murphy
2020-05-29 12:35     ` Clément Péron
2020-05-29 12:47       ` Steven Price
2020-05-10 16:55 ` [PATCH 06/15] drm/panfrost: properly handle error in probe Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 07/15] drm/panfrost: use device_property_present to check for OPP Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-29 12:45     ` Clément Péron
2020-05-10 16:55 ` [PATCH 08/15] drm/panfrost: move devfreq_init()/fini() in device Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-29 12:38     ` Clément Péron
2020-06-08 11:55       ` Tomeu Vizoso
2020-05-10 16:55 ` [PATCH 09/15] drm/panfrost: dynamically alloc regulators Clément Péron
2020-05-28 13:22   ` Steven Price
2020-05-10 16:55 ` [PATCH 10/15] drm/panfrost: add regulators to devfreq Clément Péron
2020-05-28 13:23   ` Steven Price
2020-05-29 12:37     ` Clément Péron
2020-05-10 16:55 ` [PATCH 11/15] drm/panfrost: set devfreq clock name Clément Péron
2020-05-28 13:23   ` Steven Price [this message]
2020-05-29 12:35     ` Clément Péron
2020-05-10 16:55 ` [PATCH 12/15] arm64: defconfig: Enable devfreq cooling device Clément Péron
2020-05-10 16:55 ` [PATCH 13/15] arm64: dts: allwinner: h6: Add cooling map for GPU Clément Péron
2020-05-10 16:55 ` [PATCH 14/15] [DO NOT MERGE] arm64: dts: allwinner: h6: Add GPU OPP table Clément Péron
2020-05-10 16:55 ` [PATCH 15/15] [DO NOT MERGE] arm64: dts: allwinner: force GPU regulator to be always Clément Péron
2020-05-11  5:43 ` [PATCH 00/15][RFC] Add regulator devfreq support to Panfrost Tomeu Vizoso

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