Slightly different than other platforms.
v2 [Jani]: Fix IOSF_BYTE_ENABLES_SHIFT shift. Use common routine.
v3: drop turbo defines from this patch (Ville)
use PCI_DEVFN(2,0) instead of open coding (Ville)
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_reg.h | 14 +++++++++++
drivers/gpu/drm/i915/intel_pm.c | 53 +++++++++++++++++++++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 182c494..642cb1f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1845,6 +1845,8 @@ int __gen6_gt_wait_for_fifo(struct drm_i915_private
*dev_priv);
int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32
*val);
int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32
val);
+int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32
*val);
+int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32
val);
#define __i915_read(x, y) \
u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 68051d6..85f8b0b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4451,6 +4451,20 @@
#define GEN6_PCODE_DATA 0x138128
#define GEN6_PCODE_FREQ_IA_RATIO_SHIFT 8
+#define VLV_IOSF_DOORBELL_REQ 0x182100
+#define IOSF_DEVFN_SHIFT 24
+#define IOSF_OPCODE_SHIFT 16
+#define IOSF_PORT_SHIFT 8
+#define IOSF_BYTE_ENABLES_SHIFT 4
+#define IOSF_BAR_SHIFT 1
+#define IOSF_SB_BUSY (1<<0)
+#define IOSF_PORT_PUNIT 0x4
+#define VLV_IOSF_DATA 0x182104
+#define VLV_IOSF_ADDR 0x182108
+
+#define PUNIT_OPCODE_REG_READ 6
+#define PUNIT_OPCODE_REG_WRITE 7
+
#define GEN6_GT_CORE_STATUS 0x138060
#define GEN6_CORE_CPD_STATE_MASK (7<<4)
#define GEN6_RCn_MASK 7
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 6fa9b79..9776281 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4525,3 +4525,56 @@ int sandybridge_pcode_write(struct drm_i915_private
*dev_priv, u8 mbox, u32 val)
return 0;
}
+
+static int vlv_punit_rw(struct drm_i915_private *dev_priv, u8 opcode,
+ u8 addr, u32 *val)
+{
+ u32 cmd, devfn, port, be, bar;
+
+ bar = 0;
+ be = 0xf;
+ port = IOSF_PORT_PUNIT;
+ devfn = PCI_DEVFN(2,0);
+
+ cmd = (devfn << IOSF_DEVFN_SHIFT) | (opcode << IOSF_OPCODE_SHIFT) |
+ (port << IOSF_PORT_SHIFT) | (be << IOSF_BYTE_ENABLES_SHIFT) |
+ (bar << IOSF_BAR_SHIFT);
+
+ WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+ if (I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) {
+ DRM_DEBUG_DRIVER("warning: pcode (%s) mailbox access failed\n",
+ opcode == PUNIT_OPCODE_REG_READ ?
+ "read" : "write");
+ return -EAGAIN;
+ }
+
+ I915_WRITE(VLV_IOSF_ADDR, addr);
+ if (opcode == PUNIT_OPCODE_REG_WRITE)
+ I915_WRITE(VLV_IOSF_DATA, *val);
+ I915_WRITE(VLV_IOSF_DOORBELL_REQ, cmd);
+
+ if (wait_for((I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) == 0,
+ 500)) {
+ DRM_ERROR("timeout waiting for pcode %s (%d) to finish\n",
+ opcode == PUNIT_OPCODE_REG_READ ? "read" : "write",
+ addr);
+ return -ETIMEDOUT;
+ }
+
+ if (opcode == PUNIT_OPCODE_REG_READ)
+ *val = I915_READ(VLV_IOSF_DATA);
+ I915_WRITE(VLV_IOSF_DATA, 0);
+
+ return 0;
+}
+
+int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
+{
+ return vlv_punit_rw(dev_priv, PUNIT_OPCODE_REG_READ, addr, val);
+}
+
+int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
+{
+ return vlv_punit_rw(dev_priv, PUNIT_OPCODE_REG_WRITE, addr, &val);
+}
--
1.7.10.4
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