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Date: Tue, 12 Oct 2021 16:35:51 +0200
From: Benjamin Gaignard <benjamin.gaignard@...labora.com>
To: mchehab@...nel.org, p.zabel@...gutronix.de,
gregkh@...uxfoundation.org, mripard@...nel.org,
paul.kocialkowski@...tlin.com, wens@...e.org,
jernej.skrabec@...il.com, hverkuil-cisco@...all.nl,
jc@...esim.co.uk, ezequiel@...guardiasur.com.ar
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v2 3/4] media: hantro: Use syscon instead of 'ctrl' register
In order to be able to share the control hardware block between
VPUs use a syscon instead a ioremap it in the driver.
To keep the compatibility with older DT if 'nxp,imx8mq-vpu-ctrl'
phandle is not found look at 'ctrl' reg-name.
With the method it becomes useless to provide a list of register
names so remove it.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
Please note that the only purpose of this commit is to allow to test
G2 hardware block for IMX8MQ until a proper solution isuing power domain
can be found. Do not merge it.
---
drivers/staging/media/hantro/hantro.h | 5 ++-
drivers/staging/media/hantro/imx8m_vpu_hw.c | 48 +++++++++++++--------
2 files changed, 34 insertions(+), 19 deletions(-)
diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
index c2e2dca38628..20478988a55e 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -13,6 +13,7 @@
#define HANTRO_H_
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/videodev2.h>
#include <linux/wait.h>
#include <linux/clk.h>
@@ -170,7 +171,7 @@ hantro_vdev_to_func(struct video_device *vdev)
* @reg_bases: Mapped addresses of VPU registers.
* @enc_base: Mapped address of VPU encoder register for convenience.
* @dec_base: Mapped address of VPU decoder register for convenience.
- * @ctrl_base: Mapped address of VPU control block.
+ * @ctrl_base: Regmap of VPU control block.
* @vpu_mutex: Mutex to synchronize V4L2 calls.
* @irqlock: Spinlock to synchronize access to data structures
* shared with interrupt handlers.
@@ -189,7 +190,7 @@ struct hantro_dev {
void __iomem **reg_bases;
void __iomem *enc_base;
void __iomem *dec_base;
- void __iomem *ctrl_base;
+ struct regmap *ctrl_base;
struct mutex vpu_mutex; /* video_device lock */
spinlock_t irqlock;
diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
index ea919bfb9891..ec0b16d12b54 100644
--- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
+++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
@@ -7,6 +7,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/mfd/syscon.h>
#include "hantro.h"
#include "hantro_jpeg.h"
@@ -25,30 +26,28 @@
#define CTRL_G1_PP_FUSE 0x0c
#define CTRL_G2_DEC_FUSE 0x10
+static const struct regmap_config ctrl_regmap_ctrl = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 0x14,
+};
+
static void imx8m_soft_reset(struct hantro_dev *vpu, u32 reset_bits)
{
- u32 val;
-
/* Assert */
- val = readl(vpu->ctrl_base + CTRL_SOFT_RESET);
- val &= ~reset_bits;
- writel(val, vpu->ctrl_base + CTRL_SOFT_RESET);
+ regmap_update_bits(vpu->ctrl_base, CTRL_SOFT_RESET, reset_bits, 0);
udelay(2);
/* Release */
- val = readl(vpu->ctrl_base + CTRL_SOFT_RESET);
- val |= reset_bits;
- writel(val, vpu->ctrl_base + CTRL_SOFT_RESET);
+ regmap_update_bits(vpu->ctrl_base, CTRL_SOFT_RESET,
+ reset_bits, reset_bits);
}
static void imx8m_clk_enable(struct hantro_dev *vpu, u32 clock_bits)
{
- u32 val;
-
- val = readl(vpu->ctrl_base + CTRL_CLOCK_ENABLE);
- val |= clock_bits;
- writel(val, vpu->ctrl_base + CTRL_CLOCK_ENABLE);
+ regmap_update_bits(vpu->ctrl_base, CTRL_CLOCK_ENABLE,
+ clock_bits, clock_bits);
}
static int imx8mq_runtime_resume(struct hantro_dev *vpu)
@@ -65,9 +64,9 @@ static int imx8mq_runtime_resume(struct hantro_dev *vpu)
imx8m_clk_enable(vpu, CLOCK_G1 | CLOCK_G2);
/* Set values of the fuse registers */
- writel(0xffffffff, vpu->ctrl_base + CTRL_G1_DEC_FUSE);
- writel(0xffffffff, vpu->ctrl_base + CTRL_G1_PP_FUSE);
- writel(0xffffffff, vpu->ctrl_base + CTRL_G2_DEC_FUSE);
+ regmap_write(vpu->ctrl_base, CTRL_G1_DEC_FUSE, 0xffffffff);
+ regmap_write(vpu->ctrl_base, CTRL_G1_PP_FUSE, 0xffffffff);
+ regmap_write(vpu->ctrl_base, CTRL_G2_DEC_FUSE, 0xffffffff);
clk_bulk_disable_unprepare(vpu->variant->num_clocks, vpu->clocks);
@@ -189,7 +188,22 @@ static irqreturn_t imx8m_vpu_g2_irq(int irq, void *dev_id)
static int imx8mq_vpu_hw_init(struct hantro_dev *vpu)
{
- vpu->ctrl_base = vpu->reg_bases[vpu->variant->num_regs - 1];
+ struct device_node *np = vpu->dev->of_node;
+
+ vpu->ctrl_base = syscon_regmap_lookup_by_phandle(np, "nxp,imx8m-vpu-ctrl");
+ if (IS_ERR(vpu->ctrl_base)) {
+ struct resource *res;
+ void __iomem *ctrl;
+
+ res = platform_get_resource_byname(vpu->pdev, IORESOURCE_MEM, "ctrl");
+ ctrl = devm_ioremap_resource(vpu->dev, res);
+ if (IS_ERR(ctrl))
+ return PTR_ERR(ctrl);
+
+ vpu->ctrl_base = devm_regmap_init_mmio(vpu->dev, ctrl, &ctrl_regmap_ctrl);
+ if (IS_ERR(vpu->ctrl_base))
+ return PTR_ERR(vpu->ctrl_base);
+ }
return 0;
}
--
2.30.2
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