[PATCH 25/43] drm/i915: Include gpio_mmio_base in GMBUS reg defines

ville.syrjala
2015-09-18T17:05:16Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 12 ++++-----
drivers/gpu/drm/i915/intel_i2c.c | 54 +++++++++++++++++-----------------------
2 files changed, 29 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b35e24f..0216771 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2114,7 +2114,7 @@ enum skl_disp_power_wells {
# define GPIO_DATA_VAL_IN (1 << 12)
# define GPIO_DATA_PULLUP_DISABLE (1 << 13)

-#define GMBUS0 0x5100 /* clock/port select */
+#define GMBUS0 (dev_priv->gpio_mmio_base + 0x5100) /* clock/port select */
#define GMBUS_RATE_100KHZ (0<<8)
#define GMBUS_RATE_50KHZ (1<<8)
#define GMBUS_RATE_400KHZ (2<<8) /* reserved on Pineview */
@@ -2133,7 +2133,7 @@ enum skl_disp_power_wells {
#define GMBUS_PIN_2_BXT 2
#define GMBUS_PIN_3_BXT 3
#define GMBUS_NUM_PINS 7 /* including 0 */
-#define GMBUS1 0x5104 /* command/status */
+#define GMBUS1 (dev_priv->gpio_mmio_base + 0x5104) /* command/status */
#define GMBUS_SW_CLR_INT (1<<31)
#define GMBUS_SW_RDY (1<<30)
#define GMBUS_ENT (1<<29) /* enable timeout */
@@ -2147,7 +2147,7 @@ enum skl_disp_power_wells {
#define GMBUS_SLAVE_ADDR_SHIFT 1
#define GMBUS_SLAVE_READ (1<<0)
#define GMBUS_SLAVE_WRITE (0<<0)
-#define GMBUS2 0x5108 /* status */
+#define GMBUS2 (dev_priv->gpio_mmio_base + 0x5108) /* status */
#define GMBUS_INUSE (1<<15)
#define GMBUS_HW_WAIT_PHASE (1<<14)
#define GMBUS_STALL_TIMEOUT (1<<13)
@@ -2155,14 +2155,14 @@ enum skl_disp_power_wells {
#define GMBUS_HW_RDY (1<<11)
#define GMBUS_SATOER (1<<10)
#define GMBUS_ACTIVE (1<<9)
-#define GMBUS3 0x510c /* data buffer bytes 3-0 */
-#define GMBUS4 0x5110 /* interrupt mask (Pineview+) */
+#define GMBUS3 (dev_priv->gpio_mmio_base + 0x510c) /* data buffer bytes 3-0 */
+#define GMBUS4 (dev_priv->gpio_mmio_base + 0x5110) /* interrupt mask (Pineview+) */
#define GMBUS_SLAVE_TIMEOUT_EN (1<<4)
#define GMBUS_NAK_EN (1<<3)
#define GMBUS_IDLE_EN (1<<2)
#define GMBUS_HW_WAIT_EN (1<<1)
#define GMBUS_HW_RDY_EN (1<<0)
-#define GMBUS5 0x5120 /* byte index */
+#define GMBUS5 (dev_priv->gpio_mmio_base + 0x5120) /* byte index */
#define GMBUS_2BYTE_INDEX_EN (1<<31)

/*
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index a64f26c..1369fc4 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -114,8 +114,8 @@ intel_i2c_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

- I915_WRITE(dev_priv->gpio_mmio_base + GMBUS0, 0);
- I915_WRITE(dev_priv->gpio_mmio_base + GMBUS4, 0);
+ I915_WRITE(GMBUS0, 0);
+ I915_WRITE(GMBUS4, 0);
}

static void intel_i2c_quirk_set(struct drm_i915_private *dev_priv, bool enable)
@@ -261,7 +261,6 @@ gmbus_wait_hw_status(struct drm_i915_private *dev_priv,
u32 gmbus4_irq_en)
{
int i;
- int reg_offset = dev_priv->gpio_mmio_base;
u32 gmbus2 = 0;
DEFINE_WAIT(wait);

@@ -271,13 +270,13 @@ gmbus_wait_hw_status(struct drm_i915_private *dev_priv,
/* Important: The hw handles only the first bit, so set only one! Since
* we also need to check for NAKs besides the hw ready/idle signal, we
* need to wake up periodically and check that ourselves. */
- I915_WRITE(GMBUS4 + reg_offset, gmbus4_irq_en);
+ I915_WRITE(GMBUS4, gmbus4_irq_en);

for (i = 0; i < msecs_to_jiffies_timeout(50); i++) {
prepare_to_wait(&dev_priv->gmbus_wait_queue, &wait,
TASK_UNINTERRUPTIBLE);

- gmbus2 = I915_READ_NOTRACE(GMBUS2 + reg_offset);
+ gmbus2 = I915_READ_NOTRACE(GMBUS2);
if (gmbus2 & (GMBUS_SATOER | gmbus2_status))
break;

@@ -285,7 +284,7 @@ gmbus_wait_hw_status(struct drm_i915_private *dev_priv,
}
finish_wait(&dev_priv->gmbus_wait_queue, &wait);

- I915_WRITE(GMBUS4 + reg_offset, 0);
+ I915_WRITE(GMBUS4, 0);

if (gmbus2 & GMBUS_SATOER)
return -ENXIO;
@@ -298,20 +297,19 @@ static int
gmbus_wait_idle(struct drm_i915_private *dev_priv)
{
int ret;
- int reg_offset = dev_priv->gpio_mmio_base;

-#define C ((I915_READ_NOTRACE(GMBUS2 + reg_offset) & GMBUS_ACTIVE) == 0)
+#define C ((I915_READ_NOTRACE(GMBUS2) & GMBUS_ACTIVE) == 0)

if (!HAS_GMBUS_IRQ(dev_priv->dev))
return wait_for(C, 10);

/* Important: The hw handles only the first bit, so set only one! */
- I915_WRITE(GMBUS4 + reg_offset, GMBUS_IDLE_EN);
+ I915_WRITE(GMBUS4, GMBUS_IDLE_EN);

ret = wait_event_timeout(dev_priv->gmbus_wait_queue, C,
msecs_to_jiffies_timeout(10));

- I915_WRITE(GMBUS4 + reg_offset, 0);
+ I915_WRITE(GMBUS4, 0);

if (ret)
return 0;
@@ -325,9 +323,7 @@ gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
unsigned short addr, u8 *buf, unsigned int len,
u32 gmbus1_index)
{
- int reg_offset = dev_priv->gpio_mmio_base;
-
- I915_WRITE(GMBUS1 + reg_offset,
+ I915_WRITE(GMBUS1,
gmbus1_index |
GMBUS_CYCLE_WAIT |
(len << GMBUS_BYTE_COUNT_SHIFT) |
@@ -342,7 +338,7 @@ gmbus_xfer_read_chunk(struct drm_i915_private *dev_priv,
if (ret)
return ret;

- val = I915_READ(GMBUS3 + reg_offset);
+ val = I915_READ(GMBUS3);
do {
*buf++ = val & 0xff;
val >>= 8;
@@ -380,7 +376,6 @@ static int
gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
unsigned short addr, u8 *buf, unsigned int len)
{
- int reg_offset = dev_priv->gpio_mmio_base;
unsigned int chunk_size = len;
u32 val, loop;

@@ -390,8 +385,8 @@ gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
len -= 1;
}

- I915_WRITE(GMBUS3 + reg_offset, val);
- I915_WRITE(GMBUS1 + reg_offset,
+ I915_WRITE(GMBUS3, val);
+ I915_WRITE(GMBUS1,
GMBUS_CYCLE_WAIT |
(chunk_size << GMBUS_BYTE_COUNT_SHIFT) |
(addr << GMBUS_SLAVE_ADDR_SHIFT) |
@@ -404,7 +399,7 @@ gmbus_xfer_write_chunk(struct drm_i915_private *dev_priv,
val |= *buf++ << (8 * loop);
} while (--len && ++loop < 4);

- I915_WRITE(GMBUS3 + reg_offset, val);
+ I915_WRITE(GMBUS3, val);

ret = gmbus_wait_hw_status(dev_priv, GMBUS_HW_RDY,
GMBUS_HW_RDY_EN);
@@ -452,7 +447,6 @@ gmbus_is_index_read(struct i2c_msg *msgs, int i, int num)
static int
gmbus_xfer_index_read(struct drm_i915_private *dev_priv, struct i2c_msg *msgs)
{
- int reg_offset = dev_priv->gpio_mmio_base;
u32 gmbus1_index = 0;
u32 gmbus5 = 0;
int ret;
@@ -466,13 +460,13 @@ gmbus_xfer_index_read(struct drm_i915_private *dev_priv, struct i2c_msg *msgs)

/* GMBUS5 holds 16-bit index */
if (gmbus5)
- I915_WRITE(GMBUS5 + reg_offset, gmbus5);
+ I915_WRITE(GMBUS5, gmbus5);

ret = gmbus_xfer_read(dev_priv, &msgs[1], gmbus1_index);

/* Clear GMBUS5 after each index transfer */
if (gmbus5)
- I915_WRITE(GMBUS5 + reg_offset, 0);
+ I915_WRITE(GMBUS5, 0);

return ret;
}
@@ -486,7 +480,7 @@ gmbus_xfer(struct i2c_adapter *adapter,
struct intel_gmbus,
adapter);
struct drm_i915_private *dev_priv = bus->dev_priv;
- int i = 0, inc, try = 0, reg_offset;
+ int i = 0, inc, try = 0;
int ret = 0;

intel_aux_display_runtime_get(dev_priv);
@@ -497,10 +491,8 @@ gmbus_xfer(struct i2c_adapter *adapter,
goto out;
}

- reg_offset = dev_priv->gpio_mmio_base;
-
retry:
- I915_WRITE(GMBUS0 + reg_offset, bus->reg0);
+ I915_WRITE(GMBUS0, bus->reg0);

for (; i < num; i += inc) {
inc = 1;
@@ -530,7 +522,7 @@ retry:
* a STOP on the very first cycle. To simplify the code we
* unconditionally generate the STOP condition with an additional gmbus
* cycle. */
- I915_WRITE(GMBUS1 + reg_offset, GMBUS_CYCLE_STOP | GMBUS_SW_RDY);
+ I915_WRITE(GMBUS1, GMBUS_CYCLE_STOP | GMBUS_SW_RDY);

/* Mark the GMBUS interface as disabled after waiting for idle.
* We will re-enable it at the start of the next xfer,
@@ -541,7 +533,7 @@ retry:
adapter->name);
ret = -ETIMEDOUT;
}
- I915_WRITE(GMBUS0 + reg_offset, 0);
+ I915_WRITE(GMBUS0, 0);
ret = ret ?: i;
goto out;

@@ -570,9 +562,9 @@ clear_err:
* of resetting the GMBUS controller and so clearing the
* BUS_ERROR raised by the slave's NAK.
*/
- I915_WRITE(GMBUS1 + reg_offset, GMBUS_SW_CLR_INT);
- I915_WRITE(GMBUS1 + reg_offset, 0);
- I915_WRITE(GMBUS0 + reg_offset, 0);
+ I915_WRITE(GMBUS1, GMBUS_SW_CLR_INT);
+ I915_WRITE(GMBUS1, 0);
+ I915_WRITE(GMBUS0, 0);

DRM_DEBUG_KMS("GMBUS [%s] NAK for addr: %04x %c(%d)\n",
adapter->name, msgs[i].addr,
@@ -595,7 +587,7 @@ clear_err:
timeout:
DRM_INFO("GMBUS [%s] timed out, falling back to bit banging on pin %d\n",
bus->adapter.name, bus->reg0 & 0xff);
- I915_WRITE(GMBUS0 + reg_offset, 0);
+ I915_WRITE(GMBUS0, 0);

/* Hardware may not support GMBUS over these pins? Try GPIO bitbanging instead. */
bus->force_bit = 1;
--
2.4.6