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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>
This commit is contained in:
Yuanhan Liu 2010-11-08 09:58:16 +00:00 committed by Chris Wilson
parent 65e5ecb066
commit db5e4172a0
1 changed files with 13 additions and 12 deletions
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25
drivers/gpu/drm/i915/intel_i2c.c
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@ -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 *