brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 207 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0502-drm-v3d-Add-support-for-V3D-v4.2.patch b/target/linux/bcm27xx/patches-4.19/950-0502-drm-v3d-Add-support-for-V3D-v4.2.patch
new file mode 100644
index 0000000000..35fc072d8a
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0502-drm-v3d-Add-support-for-V3D-v4.2.patch
@@ -0,0 +1,207 @@
+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;
+