Slightly different than other platforms.
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_reg.h | 22 ++++++++++++
drivers/gpu/drm/i915/intel_pm.c | 74 +++++++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 34f01a9..60eee7d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1749,6 +1749,8 @@ 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, bool trace);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7e13f34..7325b7a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4335,6 +4335,28 @@
#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_REG_GPU_LFM 0xd3
+#define PUNIT_REG_GPU_FREQ_REQ 0xd4
+#define PUNIT_REG_GPU_FREQ_STS 0xd8
+#define PUNIT_REG_MEDIA_TURBO_FREQ_REQ 0xdc
+
+#define PUNIT_OPCODE_REG_READ 6
+#define PUNIT_OPCODE_REG_WRITE 7
+
+#define PUNIT_FUSE_BUS2 0xf6 /* bits 47:40 */
+#define PUNIT_FUSE_BUS1 0xf5 /* bits 55:48 */
+
#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 7d812ba..bb97309 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4356,3 +4356,77 @@ int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
return 0;
}
+
+int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
+{
+ u32 cmd, devfn, opcode, port, be, bar;
+
+ bar = 0;
+ be = 0xf;
+ port = IOSF_PORT_PUNIT;
+ opcode = PUNIT_OPCODE_REG_READ;
+ devfn = 16;
+
+ 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 (read) mailbox access failed\n");
+ return -EAGAIN;
+ }
+
+ I915_WRITE(VLV_IOSF_ADDR, addr);
+ 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 read (%d) to finish\n",
+ addr);
+ return -ETIMEDOUT;
+ }
+
+ *val = I915_READ(VLV_IOSF_DATA);
+ I915_WRITE(VLV_IOSF_DATA, 0);
+
+ return 0;
+}
+
+int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
+{
+ u32 cmd, devfn, opcode, port, be, bar;
+
+ bar = 0;
+ be = 0xf;
+ port = IOSF_PORT_PUNIT;
+ opcode = PUNIT_OPCODE_REG_WRITE;
+ devfn = 16;
+
+ 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 (write) mailbox access failed\n");
+ return -EAGAIN;
+ }
+
+ I915_WRITE(VLV_IOSF_ADDR, addr);
+ 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 write (%d) to finish\n",
+ addr);
+ return -ETIMEDOUT;
+ }
+
+ I915_WRITE(VLV_IOSF_DATA, 0);
+
+ return 0;
+}
--
1.7.9.5
