drm/i915, intel_ips: When i915 loads after IPS, make IPS relink to i915.
[~shefty/rdma-dev.git] / drivers / platform / x86 / intel_ips.c
index c44a5e8b8b82da9d06706d9cd3a3ec0fcb2b883c..f0b3ad13c273fb73394cc78ca8fb36521a8a4c90 100644 (file)
@@ -75,6 +75,7 @@
 #include <drm/i915_drm.h>
 #include <asm/msr.h>
 #include <asm/processor.h>
+#include "intel_ips.h"
 
 #define PCI_DEVICE_ID_INTEL_THERMAL_SENSOR 0x3b32
 
 #define thm_writel(off, val) writel((val), ips->regmap + (off))
 
 static const int IPS_ADJUST_PERIOD = 5000; /* ms */
+static bool late_i915_load = false;
 
 /* For initial average collection */
 static const int IPS_SAMPLE_PERIOD = 200; /* ms */
@@ -339,6 +341,9 @@ struct ips_driver {
        u64 orig_turbo_ratios;
 };
 
+static bool
+ips_gpu_turbo_enabled(struct ips_driver *ips);
+
 /**
  * ips_cpu_busy - is CPU busy?
  * @ips: IPS driver struct
@@ -517,7 +522,7 @@ static void ips_disable_cpu_turbo(struct ips_driver *ips)
  */
 static bool ips_gpu_busy(struct ips_driver *ips)
 {
-       if (!ips->gpu_turbo_enabled)
+       if (!ips_gpu_turbo_enabled(ips))
                return false;
 
        return ips->gpu_busy();
@@ -532,7 +537,7 @@ static bool ips_gpu_busy(struct ips_driver *ips)
  */
 static void ips_gpu_raise(struct ips_driver *ips)
 {
-       if (!ips->gpu_turbo_enabled)
+       if (!ips_gpu_turbo_enabled(ips))
                return;
 
        if (!ips->gpu_raise())
@@ -549,7 +554,7 @@ static void ips_gpu_raise(struct ips_driver *ips)
  */
 static void ips_gpu_lower(struct ips_driver *ips)
 {
-       if (!ips->gpu_turbo_enabled)
+       if (!ips_gpu_turbo_enabled(ips))
                return;
 
        if (!ips->gpu_lower())
@@ -1454,6 +1459,31 @@ out_err:
        return false;
 }
 
+static bool
+ips_gpu_turbo_enabled(struct ips_driver *ips)
+{
+       if (!ips->gpu_busy && late_i915_load) {
+               if (ips_get_i915_syms(ips)) {
+                       dev_info(&ips->dev->dev,
+                                "i915 driver attached, reenabling gpu turbo\n");
+                       ips->gpu_turbo_enabled = !(thm_readl(THM_HTS) & HTS_GTD_DIS);
+               }
+       }
+
+       return ips->gpu_turbo_enabled;
+}
+
+void
+ips_link_to_i915_driver()
+{
+       /* We can't cleanly get at the various ips_driver structs from
+        * this caller (the i915 driver), so just set a flag saying
+        * that it's time to try getting the symbols again.
+        */
+       late_i915_load = true;
+}
+EXPORT_SYMBOL_GPL(ips_link_to_i915_driver);
+
 static DEFINE_PCI_DEVICE_TABLE(ips_id_table) = {
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL,
                     PCI_DEVICE_ID_INTEL_THERMAL_SENSOR), },