From 6dac9dfa57e2b86bb50270502455606b5a1a2fb8 Mon Sep 17 00:00:00 2001
From: Nicolas Boichat <drinkcat@chromium.org>
Date: Fri, 7 Feb 2020 13:26:24 +0800
Subject: drm/panfrost: Add support for multiple regulators
Git-commit: 3e1399bccf5163c59f41298b4faf768e199f4322
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
Some GPUs, namely, the bifrost/g72 part on MT8183, have a second
regulator for their SRAM, let's add support for that.
We extend the framework in a generic manner so that we could
support more than 2 regulators, if required.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviwed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200207052627.130118-5-drinkcat@chromium.org
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/panfrost/panfrost_device.c | 26 +++++++++++++-------
drivers/gpu/drm/panfrost/panfrost_device.h | 15 +++++++++++-
drivers/gpu/drm/panfrost/panfrost_drv.c | 28 +++++++++++++++-------
3 files changed, 51 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
index 238fb6d54df4..3720d50f6d9f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -87,18 +87,27 @@ static void panfrost_clk_fini(struct panfrost_device *pfdev)
static int panfrost_regulator_init(struct panfrost_device *pfdev)
{
- int ret;
+ int ret, i;
- pfdev->regulator = devm_regulator_get(pfdev->dev, "mali");
- if (IS_ERR(pfdev->regulator)) {
- ret = PTR_ERR(pfdev->regulator);
- dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
+ if (WARN(pfdev->comp->num_supplies > ARRAY_SIZE(pfdev->regulators),
+ "Too many supplies in compatible structure.\n"))
+ return -EINVAL;
+
+ for (i = 0; i < pfdev->comp->num_supplies; i++)
+ pfdev->regulators[i].supply = pfdev->comp->supply_names[i];
+
+ ret = devm_regulator_bulk_get(pfdev->dev,
+ pfdev->comp->num_supplies,
+ pfdev->regulators);
+ if (ret < 0) {
+ dev_err(pfdev->dev, "failed to get regulators: %d\n", ret);
return ret;
}
- ret = regulator_enable(pfdev->regulator);
+ ret = regulator_bulk_enable(pfdev->comp->num_supplies,
+ pfdev->regulators);
if (ret < 0) {
- dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
+ dev_err(pfdev->dev, "failed to enable regulators: %d\n", ret);
return ret;
}
@@ -107,7 +116,8 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
static void panfrost_regulator_fini(struct panfrost_device *pfdev)
{
- regulator_disable(pfdev->regulator);
+ regulator_bulk_disable(pfdev->comp->num_supplies,
+ pfdev->regulators);
}
int panfrost_device_init(struct panfrost_device *pfdev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 06713811b92c..c9468bc5573a 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -7,6 +7,7 @@
#include <linux/atomic.h>
#include <linux/io-pgtable.h>
+#include <linux/regulator/consumer.h>
#include <linux/spinlock.h>
#include <drm/drm_device.h>
#include <drm/drm_mm.h>
@@ -19,6 +20,7 @@ struct panfrost_job;
struct panfrost_perfcnt;
#define NUM_JOB_SLOTS 3
+#define MAX_REGULATORS 2
struct panfrost_features {
u16 id;
@@ -51,6 +53,16 @@ struct panfrost_features {
unsigned long hw_issues[64 / BITS_PER_LONG];
};
+/*
+ * Features that cannot be automatically detected and need matching using the
+ * compatible string, typically SoC-specific.
+ */
+struct panfrost_compatible {
+ /* Supplies count and names. */
+ int num_supplies;
+ const char * const *supply_names;
+};
+
struct panfrost_device {
struct device *dev;
struct drm_device *ddev;
@@ -59,10 +71,11 @@ struct panfrost_device {
void __iomem *iomem;
struct clk *clock;
struct clk *bus_clock;
- struct regulator *regulator;
+ struct regulator_bulk_data regulators[MAX_REGULATORS];
struct reset_control *rstc;
struct panfrost_features features;
+ const struct panfrost_compatible *comp;
spinlock_t as_lock;
unsigned long as_in_use_mask;
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index b7a618db3ee2..4d0850752623 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -584,6 +584,10 @@ static int panfrost_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pfdev);
+ pfdev->comp = of_device_get_match_data(&pdev->dev);
+ if (!pfdev->comp)
+ return -ENODEV;
+
/* Allocate and initialze the DRM device. */
ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
if (IS_ERR(ddev))
@@ -655,16 +659,22 @@ static int panfrost_remove(struct platform_device *pdev)
return 0;
}
+const char * const default_supplies[] = { "mali" };
+static const struct panfrost_compatible default_data = {
+ .num_supplies = ARRAY_SIZE(default_supplies),
+ .supply_names = default_supplies,
+};
+
static const struct of_device_id dt_match[] = {
- { .compatible = "arm,mali-t604" },
- { .compatible = "arm,mali-t624" },
- { .compatible = "arm,mali-t628" },
- { .compatible = "arm,mali-t720" },
- { .compatible = "arm,mali-t760" },
- { .compatible = "arm,mali-t820" },
- { .compatible = "arm,mali-t830" },
- { .compatible = "arm,mali-t860" },
- { .compatible = "arm,mali-t880" },
+ { .compatible = "arm,mali-t604", .data = &default_data, },
+ { .compatible = "arm,mali-t624", .data = &default_data, },
+ { .compatible = "arm,mali-t628", .data = &default_data, },
+ { .compatible = "arm,mali-t720", .data = &default_data, },
+ { .compatible = "arm,mali-t760", .data = &default_data, },
+ { .compatible = "arm,mali-t820", .data = &default_data, },
+ { .compatible = "arm,mali-t830", .data = &default_data, },
+ { .compatible = "arm,mali-t860", .data = &default_data, },
+ { .compatible = "arm,mali-t880", .data = &default_data, },
{}
};
MODULE_DEVICE_TABLE(of, dt_match);
--
2.28.0