drm/i915: add an explict mmio base for gpio/gmbus io
Again, Valleyview modes these around, so make the mmio base more
explicit to consolidate the base address computations to one
HAS_PCH_SPLIT check.
v2: Fix up the PCH_SPLIT braino ... it actually works that way round.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 601c86e..1486c76 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -49,10 +49,7 @@
intel_i2c_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- if (HAS_PCH_SPLIT(dev))
- I915_WRITE(PCH_GMBUS0, 0);
- else
- I915_WRITE(GMBUS0, 0);
+ I915_WRITE(dev_priv->gpio_mmio_base + GMBUS0, 0);
}
static void intel_i2c_quirk_set(struct drm_i915_private *dev_priv, bool enable)
@@ -162,8 +159,7 @@
algo = &bus->bit_algo;
bus->gpio_reg = map_pin_to_reg[pin];
- if (HAS_PCH_SPLIT(dev_priv->dev))
- bus->gpio_reg += PCH_GPIOA - GPIOA;
+ bus->gpio_reg += dev_priv->gpio_mmio_base;
bus->adapter.algo_data = algo;
algo->setsda = set_data;
@@ -219,7 +215,7 @@
goto out;
}
- reg_offset = HAS_PCH_SPLIT(dev_priv->dev) ? PCH_GMBUS0 - GMBUS0 : 0;
+ reg_offset = dev_priv->gpio_mmio_base;
I915_WRITE(GMBUS0 + reg_offset, bus->reg0);
@@ -359,6 +355,11 @@
struct drm_i915_private *dev_priv = dev->dev_private;
int ret, i;
+ if (HAS_PCH_SPLIT(dev))
+ dev_priv->gpio_mmio_base = PCH_GPIOA - GPIOA;
+ else
+ dev_priv->gpio_mmio_base = 0;
+
dev_priv->gmbus = kcalloc(GMBUS_NUM_PORTS, sizeof(struct intel_gmbus),
GFP_KERNEL);
if (dev_priv->gmbus == NULL)