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drm/v3d: Add support for V3D v4.2.

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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.
v4: Improve error handling for IRQ init.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190308174336.7866-2-eric@anholt.net
Reviewed-by: Dave Emett <david.emett@broadcom.com>
This commit is contained in:
Eric Anholt
2019-03-08 09:43:36 -08:00
parent fc22771547
commit eea9b97b45
5 changed files with 70 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/gpu/drm/v3d/v3d_irq.c
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@@ -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;
}
@@ -159,7 +168,7 @@ v3d_hub_irq(int irq, void *arg)
int
v3d_irq_init(struct v3d_dev *v3d)
{
int ret, core;
int irq1, ret, core;
INIT_WORK(&v3d->overflow_mem_work, v3d_overflow_mem_work);
@@ -170,17 +179,29 @@ 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;
irq1 = platform_get_irq(v3d->pdev, 1);
if (irq1 == -EPROBE_DEFER)
return irq1;
if (irq1 > 0) {
ret = devm_request_irq(v3d->dev, irq1,
v3d_irq, IRQF_SHARED,
"v3d_core0", v3d);
if (ret)
goto fail;
ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
v3d_hub_irq, IRQF_SHARED,
"v3d_hub", v3d);
if (ret)
goto fail;
} else {
v3d->single_irq_line = true;
ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
v3d_irq, IRQF_SHARED,
"v3d_core0", v3d);
if (ret)
goto fail;
ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
v3d_irq, IRQF_SHARED,
"v3d", v3d);
if (ret)
goto fail;
}
v3d_irq_enable(v3d);
return 0;