* [PATCH v2 1/3] drm/v3d: Add support for V3D v4.2.
@ 2019-02-12 20:27 Eric Anholt
2019-02-12 20:27 ` [PATCH v2 2/3] drm/v3d: Don't try to set OVRTMUOUT on V3D 4.x Eric Anholt
2019-02-12 20:27 ` [PATCH v2 3/3] drm/v3d: Make sure the GPU is on when measuring clocks Eric Anholt
0 siblings, 2 replies; 3+ messages in thread
From: Eric Anholt @ 2019-02-12 20:27 UTC (permalink / raw)
To: dri-devel; +Cc: linux-kernel, david.emett, thomas.spurden, Eric Anholt
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.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/v3d/v3d_drv.c | 19 +++++++++++++++----
drivers/gpu/drm/v3d/v3d_drv.h | 1 +
drivers/gpu/drm/v3d/v3d_gem.c | 12 +++++++++++-
drivers/gpu/drm/v3d/v3d_irq.c | 27 +++++++++++++++++++++------
4 files changed, 48 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index dd842af8b531..aef46de55b6a 100644
--- 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_gem_framebuffer_helper.h>
#include <drm/drm_fb_helper.h>
@@ -497,10 +498,6 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
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;
@@ -515,6 +512,20 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
+ if (v3d->ver >= 42) {
+ v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(v3d->reset)) {
+ ret = PTR_ERR(v3d->reset);
+ dev_err(dev, "Failed to get reset control: %ld\n",
+ ret);
+ goto dev_free;
+ }
+ } else {
+ ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
+ if (ret)
+ goto dev_free;
+ }
+
if (v3d->ver < 41) {
ret = map_regs(v3d, &v3d->gca_regs, "gca");
if (ret)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index 239b56d76f3e..b5732cf897fe 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -48,6 +48,7 @@ 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;
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 803f31467ec1..3ee3ae4d3cac 100644
--- 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);
}
diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c
index 69338da70ddc..2ad0c5865edd 100644
--- 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->ver >= 42 && status == IRQ_NONE)
+ return v3d_hub_irq(irq, arg);
+
return status;
}
@@ -170,12 +179,18 @@ 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);
- ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
- v3d_irq, IRQF_SHARED,
- "v3d_core0", v3d);
+ if (v3d->ver >= 42) {
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
+ v3d_irq, IRQF_SHARED,
+ "v3d", v3d);
+ } else {
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
+ v3d_hub_irq, IRQF_SHARED,
+ "v3d_hub", v3d);
+ ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
+ v3d_irq, IRQF_SHARED,
+ "v3d_core0", v3d);
+ }
if (ret)
dev_err(v3d->dev, "IRQ setup failed: %d\n", ret);
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v2 2/3] drm/v3d: Don't try to set OVRTMUOUT on V3D 4.x.
2019-02-12 20:27 [PATCH v2 1/3] drm/v3d: Add support for V3D v4.2 Eric Anholt
@ 2019-02-12 20:27 ` Eric Anholt
2019-02-12 20:27 ` [PATCH v2 3/3] drm/v3d: Make sure the GPU is on when measuring clocks Eric Anholt
1 sibling, 0 replies; 3+ messages in thread
From: Eric Anholt @ 2019-02-12 20:27 UTC (permalink / raw)
To: dri-devel; +Cc: linux-kernel, david.emett, thomas.spurden, Eric Anholt
The old field is gone and the register now has a different field,
QRMAXCNT for how many TMU requests get serviced before thread switch.
We were accidentally reducing it from its default of 0x3 (4 requests)
to 0x0 (1).
v2: Skip setting the reg at all on 4.x, instead of trying to update
only the old field.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/v3d/v3d_gem.c | 3 ++-
drivers/gpu/drm/v3d/v3d_regs.h | 2 ++
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 3ee3ae4d3cac..06538ffa3014 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -25,7 +25,8 @@ v3d_init_core(struct v3d_dev *v3d, int core)
* type. If you want the default behavior, you can still put
* "2" in the indirect texture state's output_type field.
*/
- V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT);
+ if (v3d->ver < 40)
+ V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT);
/* Whenever we flush the L2T cache, we always want to flush
* the whole thing.
diff --git a/drivers/gpu/drm/v3d/v3d_regs.h b/drivers/gpu/drm/v3d/v3d_regs.h
index 6ccdee9d47bd..8e88af237610 100644
--- a/drivers/gpu/drm/v3d/v3d_regs.h
+++ b/drivers/gpu/drm/v3d/v3d_regs.h
@@ -216,6 +216,8 @@
# define V3D_IDENT2_BCG_INT BIT(28)
#define V3D_CTL_MISCCFG 0x00018
+# define V3D_CTL_MISCCFG_QRMAXCNT_MASK V3D_MASK(3, 1)
+# define V3D_CTL_MISCCFG_QRMAXCNT_SHIFT 1
# define V3D_MISCCFG_OVRTMUOUT BIT(0)
#define V3D_CTL_L2CACTL 0x00020
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v2 3/3] drm/v3d: Make sure the GPU is on when measuring clocks.
2019-02-12 20:27 [PATCH v2 1/3] drm/v3d: Add support for V3D v4.2 Eric Anholt
2019-02-12 20:27 ` [PATCH v2 2/3] drm/v3d: Don't try to set OVRTMUOUT on V3D 4.x Eric Anholt
@ 2019-02-12 20:27 ` Eric Anholt
1 sibling, 0 replies; 3+ messages in thread
From: Eric Anholt @ 2019-02-12 20:27 UTC (permalink / raw)
To: dri-devel; +Cc: linux-kernel, david.emett, thomas.spurden, Eric Anholt
You'll get garbage measurements if the registers always read back
0xdeadbeef
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/v3d/v3d_debugfs.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_debugfs.c b/drivers/gpu/drm/v3d/v3d_debugfs.c
index eb2b2d2f8553..a24af2d2f574 100644
--- a/drivers/gpu/drm/v3d/v3d_debugfs.c
+++ b/drivers/gpu/drm/v3d/v3d_debugfs.c
@@ -187,6 +187,11 @@ static int v3d_measure_clock(struct seq_file *m, void *unused)
uint32_t cycles;
int core = 0;
int measure_ms = 1000;
+ int ret;
+
+ ret = pm_runtime_get_sync(v3d->dev);
+ if (ret < 0)
+ return ret;
if (v3d->ver >= 40) {
V3D_CORE_WRITE(core, V3D_V4_PCTR_0_SRC_0_3,
@@ -210,6 +215,9 @@ static int v3d_measure_clock(struct seq_file *m, void *unused)
cycles / (measure_ms * 1000),
(cycles / (measure_ms * 100)) % 10);
+ pm_runtime_mark_last_busy(v3d->dev);
+ pm_runtime_put_autosuspend(v3d->dev);
+
return 0;
}
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2019-02-12 20:27 [PATCH v2 1/3] drm/v3d: Add support for V3D v4.2 Eric Anholt
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2019-02-12 20:27 ` [PATCH v2 3/3] drm/v3d: Make sure the GPU is on when measuring clocks Eric Anholt
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