These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 26 insertions, 198 deletions

diff --git a/kernel/drivers/gpu/drm/nouveau/nouveau_platform.c b/kernel/drivers/gpu/drm/nouveau/nouveau_platform.c
index 775277f1e..35ecc0d04 100644
--- a/kernel/drivers/gpu/drm/nouveau/nouveau_platform.c
+++ b/kernel/drivers/gpu/drm/nouveau/nouveau_platform.c
@@ -19,223 +19,51 @@
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  */
-
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/reset.h>
-#include <linux/regulator/consumer.h>
-#include <linux/iommu.h>
-#include <soc/tegra/fuse.h>
-#include <soc/tegra/pmc.h>
-
-#include "nouveau_drm.h"
 #include "nouveau_platform.h"
 
-static int nouveau_platform_power_up(struct nouveau_platform_gpu *gpu)
-{
-	int err;
-
-	err = regulator_enable(gpu->vdd);
-	if (err)
-		goto err_power;
-
-	err = clk_prepare_enable(gpu->clk);
-	if (err)
-		goto err_clk;
-	err = clk_prepare_enable(gpu->clk_pwr);
-	if (err)
-		goto err_clk_pwr;
-	clk_set_rate(gpu->clk_pwr, 204000000);
-	udelay(10);
-
-	reset_control_assert(gpu->rst);
-	udelay(10);
-
-	err = tegra_powergate_remove_clamping(TEGRA_POWERGATE_3D);
-	if (err)
-		goto err_clamp;
-	udelay(10);
-
-	reset_control_deassert(gpu->rst);
-	udelay(10);
-
-	return 0;
-
-err_clamp:
-	clk_disable_unprepare(gpu->clk_pwr);
-err_clk_pwr:
-	clk_disable_unprepare(gpu->clk);
-err_clk:
-	regulator_disable(gpu->vdd);
-err_power:
-	return err;
-}
-
-static int nouveau_platform_power_down(struct nouveau_platform_gpu *gpu)
-{
-	int err;
-
-	reset_control_assert(gpu->rst);
-	udelay(10);
-
-	clk_disable_unprepare(gpu->clk_pwr);
-	clk_disable_unprepare(gpu->clk);
-	udelay(10);
-
-	err = regulator_disable(gpu->vdd);
-	if (err)
-		return err;
-
-	return 0;
-}
-
-static void nouveau_platform_probe_iommu(struct device *dev,
-					 struct nouveau_platform_gpu *gpu)
-{
-	int err;
-	unsigned long pgsize_bitmap;
-
-	mutex_init(&gpu->iommu.mutex);
-
-	if (iommu_present(&platform_bus_type)) {
-		gpu->iommu.domain = iommu_domain_alloc(&platform_bus_type);
-		if (IS_ERR(gpu->iommu.domain))
-			goto error;
-
-		/*
-		 * A IOMMU is only usable if it supports page sizes smaller
-		 * or equal to the system's PAGE_SIZE, with a preference if
-		 * both are equal.
-		 */
-		pgsize_bitmap = gpu->iommu.domain->ops->pgsize_bitmap;
-		if (pgsize_bitmap & PAGE_SIZE) {
-			gpu->iommu.pgshift = PAGE_SHIFT;
-		} else {
-			gpu->iommu.pgshift = fls(pgsize_bitmap & ~PAGE_MASK);
-			if (gpu->iommu.pgshift == 0) {
-				dev_warn(dev, "unsupported IOMMU page size\n");
-				goto free_domain;
-			}
-			gpu->iommu.pgshift -= 1;
-		}
-
-		err = iommu_attach_device(gpu->iommu.domain, dev);
-		if (err)
-			goto free_domain;
-
-		err = nvkm_mm_init(&gpu->iommu._mm, 0,
-				   (1ULL << 40) >> gpu->iommu.pgshift, 1);
-		if (err)
-			goto detach_device;
-
-		gpu->iommu.mm = &gpu->iommu._mm;
-	}
-
-	return;
-
-detach_device:
-	iommu_detach_device(gpu->iommu.domain, dev);
-
-free_domain:
-	iommu_domain_free(gpu->iommu.domain);
-
-error:
-	gpu->iommu.domain = NULL;
-	gpu->iommu.pgshift = 0;
-	dev_err(dev, "cannot initialize IOMMU MM\n");
-}
-
-static void nouveau_platform_remove_iommu(struct device *dev,
-					  struct nouveau_platform_gpu *gpu)
-{
-	if (gpu->iommu.domain) {
-		nvkm_mm_fini(&gpu->iommu._mm);
-		iommu_detach_device(gpu->iommu.domain, dev);
-		iommu_domain_free(gpu->iommu.domain);
-	}
-}
-
 static int nouveau_platform_probe(struct platform_device *pdev)
 {
-	struct nouveau_platform_gpu *gpu;
-	struct nouveau_platform_device *device;
+	const struct nvkm_device_tegra_func *func;
+	struct nvkm_device *device = NULL;
 	struct drm_device *drm;
-	int err;
-
-	gpu = devm_kzalloc(&pdev->dev, sizeof(*gpu), GFP_KERNEL);
-	if (!gpu)
-		return -ENOMEM;
-
-	gpu->vdd = devm_regulator_get(&pdev->dev, "vdd");
-	if (IS_ERR(gpu->vdd))
-		return PTR_ERR(gpu->vdd);
-
-	gpu->rst = devm_reset_control_get(&pdev->dev, "gpu");
-	if (IS_ERR(gpu->rst))
-		return PTR_ERR(gpu->rst);
-
-	gpu->clk = devm_clk_get(&pdev->dev, "gpu");
-	if (IS_ERR(gpu->clk))
-		return PTR_ERR(gpu->clk);
-
-	gpu->clk_pwr = devm_clk_get(&pdev->dev, "pwr");
-	if (IS_ERR(gpu->clk_pwr))
-		return PTR_ERR(gpu->clk_pwr);
+	int ret;
 
-	nouveau_platform_probe_iommu(&pdev->dev, gpu);
+	func = of_device_get_match_data(&pdev->dev);
 
-	err = nouveau_platform_power_up(gpu);
-	if (err)
-		return err;
+	drm = nouveau_platform_device_create(func, pdev, &device);
+	if (IS_ERR(drm))
+		return PTR_ERR(drm);
 
-	drm = nouveau_platform_device_create(pdev, &device);
-	if (IS_ERR(drm)) {
-		err = PTR_ERR(drm);
-		goto power_down;
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0) {
+		drm_dev_unref(drm);
+		return ret;
 	}
 
-	device->gpu = gpu;
-	device->gpu_speedo = tegra_sku_info.gpu_speedo_value;
-
-	err = drm_dev_register(drm, 0);
-	if (err < 0)
-		goto err_unref;
-
 	return 0;
-
-err_unref:
-	drm_dev_unref(drm);
-
-power_down:
-	nouveau_platform_power_down(gpu);
-	nouveau_platform_remove_iommu(&pdev->dev, gpu);
-
-	return err;
 }
 
 static int nouveau_platform_remove(struct platform_device *pdev)
 {
-	struct drm_device *drm_dev = platform_get_drvdata(pdev);
-	struct nouveau_drm *drm = nouveau_drm(drm_dev);
-	struct nvkm_device *device = nvxx_device(&drm->device);
-	struct nouveau_platform_gpu *gpu = nv_device_to_platform(device)->gpu;
-	int err;
-
-	nouveau_drm_device_remove(drm_dev);
-
-	err = nouveau_platform_power_down(gpu);
-
-	nouveau_platform_remove_iommu(&pdev->dev, gpu);
-
-	return err;
+	struct drm_device *dev = platform_get_drvdata(pdev);
+	nouveau_drm_device_remove(dev);
+	return 0;
 }
 
 #if IS_ENABLED(CONFIG_OF)
+static const struct nvkm_device_tegra_func gk20a_platform_data = {
+	.iommu_bit = 34,
+};
+
 static const struct of_device_id nouveau_platform_match[] = {
-	{ .compatible = "nvidia,gk20a" },
+	{
+		.compatible = "nvidia,gk20a",
+		.data = &gk20a_platform_data,
+	},
+	{
+		.compatible = "nvidia,gm20b",
+		.data = &gk20a_platform_data,
+	},
 	{ }
 };