mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
208 lines
6.5 KiB
Diff
208 lines
6.5 KiB
Diff
From b0e7b8814e74be0559e07f737ef18cc3709d4ac4 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Thu, 4 Oct 2018 17:22:43 -0700
|
|
Subject: [PATCH 576/806] drm/v3d: Add support for V3D v4.2.
|
|
|
|
No compatible string for it yet, just the version-dependent changes.
|
|
They've now tied the hub and the core interrupt lines into a single
|
|
interrupt line coming out of the block. It also turns out I made a
|
|
mistake in modeling the V3D v3.3 and v4.1 bridge as a part of V3D
|
|
itself -- the bridge is going away in favor of an external reset
|
|
controller in a larger HW module.
|
|
|
|
v2: Use consistent checks for whether we're on 4.2, and fix a leak in
|
|
an error path.
|
|
v3: Use more general means of determining if the current 4.2 changes
|
|
are in place, as apparently other platforms may switch back (noted
|
|
by Dave). Update the binding doc.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
---
|
|
.../devicetree/bindings/gpu/brcm,bcm-v3d.txt | 11 ++++--
|
|
drivers/gpu/drm/v3d/v3d_drv.c | 21 +++++++++---
|
|
drivers/gpu/drm/v3d/v3d_drv.h | 2 ++
|
|
drivers/gpu/drm/v3d/v3d_gem.c | 12 ++++++-
|
|
drivers/gpu/drm/v3d/v3d_irq.c | 34 ++++++++++++++-----
|
|
5 files changed, 63 insertions(+), 17 deletions(-)
|
|
|
|
--- a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
|
|
+++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
|
|
@@ -6,15 +6,20 @@ For V3D 2.x, see brcm,bcm-vc4.txt.
|
|
Required properties:
|
|
- compatible: Should be "brcm,7268-v3d" or "brcm,7278-v3d"
|
|
- reg: Physical base addresses and lengths of the register areas
|
|
-- reg-names: Names for the register areas. The "hub", "bridge", and "core0"
|
|
+- reg-names: Names for the register areas. The "hub" and "core0"
|
|
register areas are always required. The "gca" register area
|
|
- is required if the GCA cache controller is present.
|
|
+ is required if the GCA cache controller is present. The
|
|
+ "bridge" register area is required if an external reset
|
|
+ controller is not present.
|
|
- interrupts: The interrupt numbers. The first interrupt is for the hub,
|
|
- while the following interrupts are for the cores.
|
|
+ while the following interrupts are separate interrupt lines
|
|
+ for the cores (if they don't share the hub's interrupt).
|
|
See bindings/interrupt-controller/interrupts.txt
|
|
|
|
Optional properties:
|
|
- clocks: The core clock the unit runs on
|
|
+- resets: The reset line for v3d, if not using a mapping of the bridge
|
|
+ See bindings/reset/reset.txt
|
|
|
|
v3d {
|
|
compatible = "brcm,7268-v3d";
|
|
--- a/drivers/gpu/drm/v3d/v3d_drv.c
|
|
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
|
|
@@ -19,6 +19,7 @@
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
+#include <linux/reset.h>
|
|
#include <drm/drm_fb_cma_helper.h>
|
|
#include <drm/drm_fb_helper.h>
|
|
|
|
@@ -265,10 +266,6 @@ static int v3d_platform_drm_probe(struct
|
|
v3d->pdev = pdev;
|
|
drm = &v3d->drm;
|
|
|
|
- ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
|
|
- if (ret)
|
|
- goto dev_free;
|
|
-
|
|
ret = map_regs(v3d, &v3d->hub_regs, "hub");
|
|
if (ret)
|
|
goto dev_free;
|
|
@@ -283,6 +280,22 @@ static int v3d_platform_drm_probe(struct
|
|
v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
|
|
WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
|
|
|
|
+ v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
|
|
+ if (IS_ERR(v3d->reset)) {
|
|
+ ret = PTR_ERR(v3d->reset);
|
|
+
|
|
+ if (ret == -EPROBE_DEFER)
|
|
+ goto dev_free;
|
|
+
|
|
+ v3d->reset = NULL;
|
|
+ ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
|
|
+ if (ret) {
|
|
+ dev_err(dev,
|
|
+ "Failed to get reset control or bridge regs\n");
|
|
+ goto dev_free;
|
|
+ }
|
|
+ }
|
|
+
|
|
if (v3d->ver < 41) {
|
|
ret = map_regs(v3d, &v3d->gca_regs, "gca");
|
|
if (ret)
|
|
--- a/drivers/gpu/drm/v3d/v3d_drv.h
|
|
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
|
|
@@ -34,6 +34,7 @@ struct v3d_dev {
|
|
* and revision.
|
|
*/
|
|
int ver;
|
|
+ bool single_irq_line;
|
|
|
|
struct device *dev;
|
|
struct platform_device *pdev;
|
|
@@ -42,6 +43,7 @@ struct v3d_dev {
|
|
void __iomem *bridge_regs;
|
|
void __iomem *gca_regs;
|
|
struct clk *clk;
|
|
+ struct reset_control *reset;
|
|
|
|
/* Virtual and DMA addresses of the single shared page table. */
|
|
volatile u32 *pt;
|
|
--- a/drivers/gpu/drm/v3d/v3d_gem.c
|
|
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
|
|
@@ -6,6 +6,7 @@
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
+#include <linux/reset.h>
|
|
#include <linux/device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/sched/signal.h>
|
|
@@ -69,7 +70,7 @@ v3d_idle_gca(struct v3d_dev *v3d)
|
|
}
|
|
|
|
static void
|
|
-v3d_reset_v3d(struct v3d_dev *v3d)
|
|
+v3d_reset_by_bridge(struct v3d_dev *v3d)
|
|
{
|
|
int version = V3D_BRIDGE_READ(V3D_TOP_GR_BRIDGE_REVISION);
|
|
|
|
@@ -89,6 +90,15 @@ v3d_reset_v3d(struct v3d_dev *v3d)
|
|
V3D_TOP_GR_BRIDGE_SW_INIT_1_V3D_CLK_108_SW_INIT);
|
|
V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_1, 0);
|
|
}
|
|
+}
|
|
+
|
|
+static void
|
|
+v3d_reset_v3d(struct v3d_dev *v3d)
|
|
+{
|
|
+ if (v3d->reset)
|
|
+ reset_control_reset(v3d->reset);
|
|
+ else
|
|
+ v3d_reset_by_bridge(v3d);
|
|
|
|
v3d_init_hw_state(v3d);
|
|
}
|
|
--- a/drivers/gpu/drm/v3d/v3d_irq.c
|
|
+++ b/drivers/gpu/drm/v3d/v3d_irq.c
|
|
@@ -27,6 +27,9 @@
|
|
V3D_HUB_INT_MMU_CAP | \
|
|
V3D_HUB_INT_TFUC))
|
|
|
|
+static irqreturn_t
|
|
+v3d_hub_irq(int irq, void *arg);
|
|
+
|
|
static void
|
|
v3d_overflow_mem_work(struct work_struct *work)
|
|
{
|
|
@@ -112,6 +115,12 @@ v3d_irq(int irq, void *arg)
|
|
if (intsts & V3D_INT_GMPV)
|
|
dev_err(v3d->dev, "GMP violation\n");
|
|
|
|
+ /* V3D 4.2 wires the hub and core IRQs together, so if we &
|
|
+ * didn't see the common one then check hub for MMU IRQs.
|
|
+ */
|
|
+ if (v3d->single_irq_line && status == IRQ_NONE)
|
|
+ return v3d_hub_irq(irq, arg);
|
|
+
|
|
return status;
|
|
}
|
|
|
|
@@ -170,15 +179,22 @@ v3d_irq_init(struct v3d_dev *v3d)
|
|
V3D_CORE_WRITE(core, V3D_CTL_INT_CLR, V3D_CORE_IRQS);
|
|
V3D_WRITE(V3D_HUB_INT_CLR, V3D_HUB_IRQS);
|
|
|
|
- ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
|
|
- v3d_hub_irq, IRQF_SHARED,
|
|
- "v3d_hub", v3d);
|
|
- if (ret)
|
|
- goto fail;
|
|
-
|
|
- ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
|
|
- v3d_irq, IRQF_SHARED,
|
|
- "v3d_core0", v3d);
|
|
+ if (platform_get_irq(v3d->pdev, 1) < 0) {
|
|
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
|
|
+ v3d_irq, IRQF_SHARED,
|
|
+ "v3d", v3d);
|
|
+ v3d->single_irq_line = true;
|
|
+ } else {
|
|
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
|
|
+ v3d_hub_irq, IRQF_SHARED,
|
|
+ "v3d_hub", v3d);
|
|
+ if (ret)
|
|
+ goto fail;
|
|
+
|
|
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
|
|
+ v3d_irq, IRQF_SHARED,
|
|
+ "v3d_core0", v3d);
|
|
+ }
|
|
if (ret)
|
|
goto fail;
|
|
|