gpu: nvgpu: bring back tegra idle registration

To make do_idle work when nvgpu is built as a module, reverse the order
of call dependencies for do_idle. Don't provide visible
gk20a_do_{idle,unidle}() functions for the kernel but instead call the
kernel for registering and unregistering pointers to them when the
driver loads and unloads.

Refactor the internal __gk20a_do_{idle,unidle} functions to take a
struct gk20a * instead of struct device *, and use the callback api for
providing that g instead of retrieving the plat device from device tree.

Bug 200290850

Change-Id: Ibef8b069302e547b298069cbb97734f461a10cc3
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1493774
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c b/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
index 275b663f..8c1dbd37 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
@@ -22,7 +22,6 @@
 #include <linux/device.h>
 #include <linux/pm_runtime.h>
 #include <linux/fb.h>
-#include <linux/gk20a.h>
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0))
 #include <soc/tegra/tegra-dvfs.h>
 #endif
@@ -742,7 +741,7 @@ static ssize_t force_idle_store(struct device *dev,
                 if (g->forced_idle)
                         return count; /* do nothing */
                 else {
-                        err = __gk20a_do_idle(dev, false);
+                        err = __gk20a_do_idle(g, false);
                         if (!err) {
                                 g->forced_idle = 1;
                                 dev_info(dev, "gpu is idle : %d\n",
@@ -753,7 +752,7 @@ static ssize_t force_idle_store(struct device *dev,
                 if (!g->forced_idle)
                         return count; /* do nothing */
                 else {
-                        err = __gk20a_do_unidle(dev);
+                        err = __gk20a_do_unidle(g);
                         if (!err) {
                                 g->forced_idle = 0;
                                 dev_info(dev, "gpu is idle : %d\n",