meta-digi-arm: add GPU frequency patch to external gpu driver

This commit adds the minimum GPU frequency patch to the community
Vivante GPU driver repository.

https://jira.digi.com/browse/DEL-1969

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-arm/recipes-kernel/kernel-modules/kernel-module-imx-gpu-viv/0001-mxc-gpu-use-recommended-values-for-minimum-GPU-frequ.patch

@@ -0,0 +1,70 @@
+From: Javier Viguera <javier.viguera@digi.com>
+Date: Tue, 10 Nov 2015 17:45:37 +0100
+Subject: [PATCH] mxc: gpu: use recommended values for minimum GPU frequency
+ divisor
+
+Freescale recommends the following default minimum GPU frequency divisors
+depending on the CPU family:
+    - 3 for Dual/Quad
+    - 8 for DualLite/Solo
+
+Adapted for the external Vivante GPU driver from commit a790ad3 in linux
+git repository.
+
+Signed-off-by: Javier Viguera <javier.viguera@digi.com>
+---
+ .../hal/os/linux/kernel/gc_hal_kernel_probe.c               | 13 ++++++++++++-
+ .../platform/freescale/gc_hal_kernel_platform_imx6q14.c     |  2 +-
+ 2 files changed, 13 insertions(+), 2 deletions(-)
+
+diff --git a/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/gc_hal_kernel_probe.c b/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/gc_hal_kernel_probe.c
+index 4a29f0e776e2..69a2d483b2cd 100644
+--- a/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/gc_hal_kernel_probe.c
++++ b/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/gc_hal_kernel_probe.c
+@@ -54,6 +54,7 @@
+ 
+ 
+ #include <linux/device.h>
++#include <linux/of.h>
+ #include <linux/slab.h>
+ 
+ #include "gc_hal_kernel_linux.h"
+@@ -190,7 +191,7 @@ module_param(showArgs, int, 0644);
+ static int mmu = 1;
+ module_param(mmu, int, 0644);
+ 
+-static int gpu3DMinClock = 1;
++static int gpu3DMinClock = 0;
+ 
+ static int contiguousRequested = 0;
+ 
+@@ -1115,6 +1116,16 @@ static int __devinit gpu_probe(struct platform_device *pdev)
+         _UpdateModuleParam(&moduleParam);
+     }
+ 
++    /* If undefined, set Freescale recommended value. Else use the min freq. */
++    if (gpu3DMinClock == 0) {
++        if (of_machine_is_compatible("fsl,imx6dl"))
++            gpu3DMinClock = 8;
++        else if (of_machine_is_compatible("fsl,imx6q"))
++            gpu3DMinClock = 3;
++        else
++            gpu3DMinClock = 1;
++    }
++
+     ret = drv_init();
+ 
+     if (!ret)
+diff --git a/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/platform/freescale/gc_hal_kernel_platform_imx6q14.c b/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/platform/freescale/gc_hal_kernel_platform_imx6q14.c
+index a12579d44723..c2a54b7d072d 100644
+--- a/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/platform/freescale/gc_hal_kernel_platform_imx6q14.c
++++ b/kernel-module-imx-gpu-viv-src/hal/os/linux/kernel/platform/freescale/gc_hal_kernel_platform_imx6q14.c
+@@ -103,7 +103,7 @@ extern int unregister_thermal_notifier(struct notifier_block *nb);
+ #define UNREG_THERMAL_NOTIFIER(a) unregister_thermal_notifier(a);
+ #endif
+ 
+-static int initgpu3DMinClock = 1;
++static int initgpu3DMinClock = 0;
+ module_param(initgpu3DMinClock, int, 0644);
+ 
+ struct platform_device *pdevice;

meta-digi-arm/recipes-kernel/kernel-modules/kernel-module-imx-gpu-viv_%.bbappend

@@ -0,0 +1,5 @@
+# Copyright (C) 2015 Digi International
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/${BPN}:"
+
+SRC_URI += "file://0001-mxc-gpu-use-recommended-values-for-minimum-GPU-frequ.patch"