ENGR00209022 Update gpu clock management code

-This patch from vivante.They need to bypass the
reference count in clock management code as they
may touch clock while they just want to change
power state.

Signed-off-by: Loren Huang <b02279@freescale.com>
Acked-by: Lily Zhang

diff --git a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
index 510b0300e3c4fcad7d8a6c2a0207139fd1957740..cbc7c848917e7b7e9fc65906d9eeca93c8c7e54a 100644 (file)
--- a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
+++ b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
@@ -6934,46 +6934,55 @@ gckOS_SetGPUPower(
     struct clk *clk_2dcore = Os->device->clk_2d_core;
     struct clk *clk_2d_axi = Os->device->clk_2d_axi;
     struct clk *clk_vg_axi = Os->device->clk_vg_axi;
+    
+    gctBOOL oldClockState = gcvFALSE;
 
     gcmkHEADER_ARG("Os=0x%X Core=%d Clock=%d Power=%d", Os, Core, Clock, Power);
+
+    if (Os->device->kernels[Core] != NULL)
+        oldClockState = Os->device->kernels[Core]->hardware->clockState;
+
     if (Clock == gcvTRUE) {
-        switch (Core) {
-        case gcvCORE_MAJOR:
-            clk_enable(clk_3dcore);
-            if (cpu_is_mx6q())
-                clk_enable(clk_3dshader);
-            break;
-        case gcvCORE_2D:
-            clk_enable(clk_2dcore);
-            clk_enable(clk_2d_axi);
-            break;
-        case gcvCORE_VG:
-            clk_enable(clk_2dcore);
-            clk_enable(clk_vg_axi);
-            break;
-        default:
-            break;
+        if (oldClockState == gcvFALSE) {
+            switch (Core) {
+            case gcvCORE_MAJOR:
+                clk_enable(clk_3dcore);
+                if (cpu_is_mx6q())
+                    clk_enable(clk_3dshader);
+                break;
+            case gcvCORE_2D:
+                clk_enable(clk_2dcore);
+                clk_enable(clk_2d_axi);
+                break;
+            case gcvCORE_VG:
+                clk_enable(clk_2dcore);
+                clk_enable(clk_vg_axi);
+                break;
+            default:
+                break;
+            }
         }
     } else {
-        switch (Core) {
-        case gcvCORE_MAJOR:
-            if (cpu_is_mx6q())
-                clk_disable(clk_3dshader);
-            clk_disable(clk_3dcore);
-            break;
-        case gcvCORE_2D:
-            clk_disable(clk_2dcore);
-            clk_disable(clk_2d_axi);
-            break;
-        case gcvCORE_VG:
-            clk_disable(clk_2dcore);
-            clk_disable(clk_vg_axi);
-            break;
-        default:
-            break;
+        if (oldClockState == gcvTRUE) {
+            switch (Core) {
+            case gcvCORE_MAJOR:
+                if (cpu_is_mx6q())
+                    clk_disable(clk_3dshader);
+                clk_disable(clk_3dcore);
+                break;
+            case gcvCORE_2D:
+                clk_disable(clk_2dcore);
+                clk_disable(clk_2d_axi);
+                break;
+            case gcvCORE_VG:
+                clk_disable(clk_2dcore);
+                clk_disable(clk_vg_axi);
+                break;
+            default:
+                break;
+            }
         }
     }
-    /* TODO: Put your code here. */
 
     gcmkFOOTER_NO();
     return gcvSTATUS_OK;