From eea9b97b4504607a0805c71b20d2c3e93c8711a7 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 8 Mar 2019 09:43:36 -0800 Subject: 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. v4: Improve error handling for IRQ init. Signed-off-by: Eric Anholt Link: https://patchwork.freedesktop.org/patch/msgid/20190308174336.7866-2-eric@anholt.net Reviewed-by: Dave Emett --- drivers/gpu/drm/v3d/v3d_irq.c | 45 +++++++++++++++++++++++++++++++------------ 1 file changed, 33 insertions(+), 12 deletions(-) (limited to 'drivers/gpu/drm/v3d/v3d_irq.c') diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c index 29d746cfce57..b8aea2dfbe82 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->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; - - ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1), - v3d_irq, IRQF_SHARED, - "v3d_core0", 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, 0), + v3d_irq, IRQF_SHARED, + "v3d", v3d); + if (ret) + goto fail; + } v3d_irq_enable(v3d); return 0; -- cgit