drm/i915: filter out the read/write of GPIO registers from debug tracing

These registers are written very frequently, are timing sensitive, and
not particularly relevant to any debugging, so remove the tracepoints
from these.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 2be4f728ed0c7b250550613cc93259462db9735a..8f5c0d33ea0087d2a3537d7c7a3e25788e740dbf 100644 (file)
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -85,8 +85,9 @@ static u32 get_reserved(struct intel_gpio *gpio)
 
        /* On most chips, these bits must be preserved in software. */
        if (!IS_I830(dev) && !IS_845G(dev))
-               reserved = I915_READ(gpio->reg) & (GPIO_DATA_PULLUP_DISABLE |
-                                                  GPIO_CLOCK_PULLUP_DISABLE);
+               reserved = I915_READ_NOTRACE(gpio->reg) &
+                                            (GPIO_DATA_PULLUP_DISABLE |
+                                             GPIO_CLOCK_PULLUP_DISABLE);
 
        return reserved;
 }
@@ -96,9 +97,9 @@ static int get_clock(void *data)
        struct intel_gpio *gpio = data;
        struct drm_i915_private *dev_priv = gpio->dev_priv;
        u32 reserved = get_reserved(gpio);
-       I915_WRITE(gpio->reg, reserved | GPIO_CLOCK_DIR_MASK);
-       I915_WRITE(gpio->reg, reserved);
-       return (I915_READ(gpio->reg) & GPIO_CLOCK_VAL_IN) != 0;
+       I915_WRITE_NOTRACE(gpio->reg, reserved | GPIO_CLOCK_DIR_MASK);
+       I915_WRITE_NOTRACE(gpio->reg, reserved);
+       return (I915_READ_NOTRACE(gpio->reg) & GPIO_CLOCK_VAL_IN) != 0;
 }
 
 static int get_data(void *data)
@@ -106,9 +107,9 @@ static int get_data(void *data)
        struct intel_gpio *gpio = data;
        struct drm_i915_private *dev_priv = gpio->dev_priv;
        u32 reserved = get_reserved(gpio);
-       I915_WRITE(gpio->reg, reserved | GPIO_DATA_DIR_MASK);
-       I915_WRITE(gpio->reg, reserved);
-       return (I915_READ(gpio->reg) & GPIO_DATA_VAL_IN) != 0;
+       I915_WRITE_NOTRACE(gpio->reg, reserved | GPIO_DATA_DIR_MASK);
+       I915_WRITE_NOTRACE(gpio->reg, reserved);
+       return (I915_READ_NOTRACE(gpio->reg) & GPIO_DATA_VAL_IN) != 0;
 }
 
 static void set_clock(void *data, int state_high)
@@ -124,8 +125,8 @@ static void set_clock(void *data, int state_high)
                clock_bits = GPIO_CLOCK_DIR_OUT | GPIO_CLOCK_DIR_MASK |
                        GPIO_CLOCK_VAL_MASK;
 
-       I915_WRITE(gpio->reg, reserved | clock_bits);
-       POSTING_READ(gpio->reg);
+       I915_WRITE_NOTRACE(gpio->reg, reserved | clock_bits);
+       POSTING_READ_NOTRACE(gpio->reg);
 }
 
 static void set_data(void *data, int state_high)
@@ -141,8 +142,8 @@ static void set_data(void *data, int state_high)
                data_bits = GPIO_DATA_DIR_OUT | GPIO_DATA_DIR_MASK |
                        GPIO_DATA_VAL_MASK;
 
-       I915_WRITE(gpio->reg, reserved | data_bits);
-       POSTING_READ(gpio->reg);
+       I915_WRITE_NOTRACE(gpio->reg, reserved | data_bits);
+       POSTING_READ_NOTRACE(gpio->reg);
 }
 
 static struct i2c_adapter *