+++ /dev/null
-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] 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;
-
projects / openwrt / staging / wigyori.git / blobdiff