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提交 e957d772 编写于 作者: C Chris Wilson
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drm/i915/sdvo: Fix GMBUSification 

Besides a couple of bugs when writing more than a single byte along the
GMBUS, SDVO was completely failing whilst trying to use GMBUS, so use
bit banging instead.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
上级 a56ba56c
隐藏空白更改
内联 并排
Showing with 339 addition and 196 deletion
drivers/gpu/drm/i915/i915_drv.h
浏览文件 @ e957d772
...@@ -132,10 +132,12 @@ struct drm_i915_fence_reg { ...@@ -132,10 +132,12 @@ struct drm_i915_fence_reg {
}; };
struct sdvo_device_mapping { struct sdvo_device_mapping {
u8 initialized;
u8 dvo_port; u8 dvo_port;
u8 slave_addr; u8 slave_addr;
u8 dvo_wiring; u8 dvo_wiring;
u8 initialized; u8 i2c_pin;
u8 i2c_speed;
u8 ddc_pin; u8 ddc_pin;
}; };
...@@ -248,8 +250,8 @@ typedef struct drm_i915_private { ...@@ -248,8 +250,8 @@ typedef struct drm_i915_private {
struct intel_gmbus { struct intel_gmbus {
struct i2c_adapter adapter; struct i2c_adapter adapter;
struct i2c_adapter *force_bitbanging; struct i2c_adapter *force_bit;
int pin; u32 reg0;
} *gmbus; } *gmbus;
struct pci_dev *bridge_dev; struct pci_dev *bridge_dev;
...@@ -1104,6 +1106,8 @@ extern int i915_restore_state(struct drm_device *dev); ...@@ -1104,6 +1106,8 @@ extern int i915_restore_state(struct drm_device *dev);
/* intel_i2c.c */ /* intel_i2c.c */
extern int intel_setup_gmbus(struct drm_device *dev); extern int intel_setup_gmbus(struct drm_device *dev);
extern void intel_teardown_gmbus(struct drm_device *dev); extern void intel_teardown_gmbus(struct drm_device *dev);
extern void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
extern void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
extern void intel_i2c_reset(struct drm_device *dev); extern void intel_i2c_reset(struct drm_device *dev);
/* intel_opregion.c */ /* intel_opregion.c */
......
drivers/gpu/drm/i915/intel_bios.c
浏览文件 @ e957d772
...@@ -369,7 +369,16 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, ...@@ -369,7 +369,16 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
p_mapping->slave_addr = p_child->slave_addr; p_mapping->slave_addr = p_child->slave_addr;
p_mapping->dvo_wiring = p_child->dvo_wiring; p_mapping->dvo_wiring = p_child->dvo_wiring;
p_mapping->ddc_pin = p_child->ddc_pin; p_mapping->ddc_pin = p_child->ddc_pin;
p_mapping->i2c_pin = p_child->i2c_pin;
p_mapping->i2c_speed = p_child->i2c_speed;
p_mapping->initialized = 1; p_mapping->initialized = 1;
DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d, i2c_speed=%d\n",
p_mapping->dvo_port,
p_mapping->slave_addr,
p_mapping->dvo_wiring,
p_mapping->ddc_pin,
p_mapping->i2c_pin,
p_mapping->i2c_speed);
} else { } else {
DRM_DEBUG_KMS("Maybe one SDVO port is shared by " DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
"two SDVO device.\n"); "two SDVO device.\n");
......
drivers/gpu/drm/i915/intel_bios.h
浏览文件 @ e957d772
...@@ -197,7 +197,8 @@ struct bdb_general_features { ...@@ -197,7 +197,8 @@ struct bdb_general_features {
struct child_device_config { struct child_device_config {
u16 handle; u16 handle;
u16 device_type; u16 device_type;
u8 device_id[10]; /* See DEVICE_TYPE_* above */ u8 i2c_speed;
u8 rsvd[9];
u16 addin_offset; u16 addin_offset;
u8 dvo_port; /* See Device_PORT_* above */ u8 dvo_port; /* See Device_PORT_* above */
u8 i2c_pin; u8 i2c_pin;
......
drivers/gpu/drm/i915/intel_i2c.c
浏览文件 @ e957d772
...@@ -38,6 +38,12 @@ ...@@ -38,6 +38,12 @@
#define I2C_RISEFALL_TIME 20 #define I2C_RISEFALL_TIME 20
static inline struct intel_gmbus *
to_intel_gmbus(struct i2c_adapter *i2c)
{
return container_of(i2c, struct intel_gmbus, adapter);
}
struct intel_gpio { struct intel_gpio {
struct i2c_adapter adapter; struct i2c_adapter adapter;
struct i2c_algo_bit_data algo; struct i2c_algo_bit_data algo;
...@@ -71,10 +77,27 @@ static void intel_i2c_quirk_set(struct drm_i915_private *dev_priv, bool enable) ...@@ -71,10 +77,27 @@ static void intel_i2c_quirk_set(struct drm_i915_private *dev_priv, bool enable)
I915_WRITE(DSPCLK_GATE_D, val); I915_WRITE(DSPCLK_GATE_D, val);
} }
static u32 get_reserved(struct intel_gpio *gpio)
{
struct drm_i915_private *dev_priv = gpio->dev_priv;
struct drm_device *dev = dev_priv->dev;
u32 reserved = 0;
/* 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);
return reserved;
}
static int get_clock(void *data) static int get_clock(void *data)
{ {
struct intel_gpio *gpio = data; struct intel_gpio *gpio = data;
struct drm_i915_private *dev_priv = gpio->dev_priv; 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; return (I915_READ(gpio->reg) & GPIO_CLOCK_VAL_IN) != 0;
} }
...@@ -82,6 +105,9 @@ static int get_data(void *data) ...@@ -82,6 +105,9 @@ static int get_data(void *data)
{ {
struct intel_gpio *gpio = data; struct intel_gpio *gpio = data;
struct drm_i915_private *dev_priv = gpio->dev_priv; 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; return (I915_READ(gpio->reg) & GPIO_DATA_VAL_IN) != 0;
} }
...@@ -89,13 +115,8 @@ static void set_clock(void *data, int state_high) ...@@ -89,13 +115,8 @@ static void set_clock(void *data, int state_high)
{ {
struct intel_gpio *gpio = data; struct intel_gpio *gpio = data;
struct drm_i915_private *dev_priv = gpio->dev_priv; struct drm_i915_private *dev_priv = gpio->dev_priv;
struct drm_device *dev = dev_priv->dev; u32 reserved = get_reserved(gpio);
u32 reserved = 0, clock_bits; u32 clock_bits;
/* 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);
if (state_high) if (state_high)
clock_bits = GPIO_CLOCK_DIR_IN | GPIO_CLOCK_DIR_MASK; clock_bits = GPIO_CLOCK_DIR_IN | GPIO_CLOCK_DIR_MASK;
...@@ -111,13 +132,8 @@ static void set_data(void *data, int state_high) ...@@ -111,13 +132,8 @@ static void set_data(void *data, int state_high)
{ {
struct intel_gpio *gpio = data; struct intel_gpio *gpio = data;
struct drm_i915_private *dev_priv = gpio->dev_priv; struct drm_i915_private *dev_priv = gpio->dev_priv;
struct drm_device *dev = dev_priv->dev; u32 reserved = get_reserved(gpio);
u32 reserved = 0, data_bits; u32 data_bits;
/* 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);
if (state_high) if (state_high)
data_bits = GPIO_DATA_DIR_IN | GPIO_DATA_DIR_MASK; data_bits = GPIO_DATA_DIR_IN | GPIO_DATA_DIR_MASK;
...@@ -155,7 +171,7 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin) ...@@ -155,7 +171,7 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin)
gpio->reg += PCH_GPIOA - GPIOA; gpio->reg += PCH_GPIOA - GPIOA;
gpio->dev_priv = dev_priv; gpio->dev_priv = dev_priv;
snprintf(gpio->adapter.name, I2C_NAME_SIZE, "GPIO %d", pin); snprintf(gpio->adapter.name, I2C_NAME_SIZE, "GPIO%c", "?BACDEF?"[pin]);
gpio->adapter.owner = THIS_MODULE; gpio->adapter.owner = THIS_MODULE;
gpio->adapter.algo_data = &gpio->algo; gpio->adapter.algo_data = &gpio->algo;
gpio->adapter.dev.parent = &dev_priv->dev->pdev->dev; gpio->adapter.dev.parent = &dev_priv->dev->pdev->dev;
...@@ -170,16 +186,6 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin) ...@@ -170,16 +186,6 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin)
if (i2c_bit_add_bus(&gpio->adapter)) if (i2c_bit_add_bus(&gpio->adapter))
goto out_free; goto out_free;
intel_i2c_reset(dev_priv->dev);
/* JJJ: raise SCL and SDA? */
intel_i2c_quirk_set(dev_priv, true);
set_data(gpio, 1);
udelay(I2C_RISEFALL_TIME);
set_clock(gpio, 1);
udelay(I2C_RISEFALL_TIME);
intel_i2c_quirk_set(dev_priv, false);
return &gpio->adapter; return &gpio->adapter;
out_free: out_free:
...@@ -188,17 +194,27 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin) ...@@ -188,17 +194,27 @@ intel_gpio_create(struct drm_i915_private *dev_priv, u32 pin)
} }
static int static int
quirk_i2c_transfer(struct drm_i915_private *dev_priv, intel_i2c_quirk_xfer(struct drm_i915_private *dev_priv,
struct i2c_adapter *adapter, struct i2c_adapter *adapter,
struct i2c_msg *msgs, struct i2c_msg *msgs,
int num) int num)
{ {
struct intel_gpio *gpio = container_of(adapter,
struct intel_gpio,
adapter);
int ret; int ret;
intel_i2c_reset(dev_priv->dev); intel_i2c_reset(dev_priv->dev);
intel_i2c_quirk_set(dev_priv, true); intel_i2c_quirk_set(dev_priv, true);
ret = i2c_transfer(adapter, msgs, num); set_data(gpio, 1);
set_clock(gpio, 1);
udelay(I2C_RISEFALL_TIME);
ret = adapter->algo->master_xfer(adapter, msgs, num);
set_data(gpio, 1);
set_clock(gpio, 1);
intel_i2c_quirk_set(dev_priv, false); intel_i2c_quirk_set(dev_priv, false);
return ret; return ret;
...@@ -213,21 +229,15 @@ gmbus_xfer(struct i2c_adapter *adapter, ...@@ -213,21 +229,15 @@ gmbus_xfer(struct i2c_adapter *adapter,
struct intel_gmbus, struct intel_gmbus,
adapter); adapter);
struct drm_i915_private *dev_priv = adapter->algo_data; struct drm_i915_private *dev_priv = adapter->algo_data;
int i, speed, reg_offset; int i, reg_offset;
if (bus->force_bitbanging) if (bus->force_bit)
return quirk_i2c_transfer(dev_priv, bus->force_bitbanging, msgs, num); return intel_i2c_quirk_xfer(dev_priv,
bus->force_bit, msgs, num);
reg_offset = HAS_PCH_SPLIT(dev_priv->dev) ? PCH_GMBUS0 - GMBUS0 : 0; reg_offset = HAS_PCH_SPLIT(dev_priv->dev) ? PCH_GMBUS0 - GMBUS0 : 0;
speed = GMBUS_RATE_100KHZ; I915_WRITE(GMBUS0 + reg_offset, bus->reg0);
if (INTEL_INFO(dev_priv->dev)->gen > 4 || IS_G4X(dev_priv->dev)) {
if (bus->pin == GMBUS_PORT_DPB) /* SDVO only? */
speed = GMBUS_RATE_1MHZ;
else
speed = GMBUS_RATE_400KHZ;
}
I915_WRITE(GMBUS0 + reg_offset, speed | bus->pin);
for (i = 0; i < num; i++) { for (i = 0; i < num; i++) {
u16 len = msgs[i].len; u16 len = msgs[i].len;
...@@ -239,6 +249,7 @@ gmbus_xfer(struct i2c_adapter *adapter, ...@@ -239,6 +249,7 @@ gmbus_xfer(struct i2c_adapter *adapter,
(len << GMBUS_BYTE_COUNT_SHIFT) | (len << GMBUS_BYTE_COUNT_SHIFT) |
(msgs[i].addr << GMBUS_SLAVE_ADDR_SHIFT) | (msgs[i].addr << GMBUS_SLAVE_ADDR_SHIFT) |
GMBUS_SLAVE_READ | GMBUS_SW_RDY); GMBUS_SLAVE_READ | GMBUS_SW_RDY);
POSTING_READ(GMBUS2+reg_offset);
do { do {
u32 val, loop = 0; u32 val, loop = 0;
...@@ -254,20 +265,35 @@ gmbus_xfer(struct i2c_adapter *adapter, ...@@ -254,20 +265,35 @@ gmbus_xfer(struct i2c_adapter *adapter,
} while (--len && ++loop < 4); } while (--len && ++loop < 4);
} while (len); } while (len);
} else { } else {
u32 val = 0, loop = 0; u32 val, loop;
BUG_ON(msgs[i].len > 4);
val = loop = 0;
do { do {
val |= *buf++ << (loop*8); val |= *buf++ << (8 * loop);
} while (--len && +loop < 4); } while (--len && ++loop < 4);
I915_WRITE(GMBUS3 + reg_offset, val); I915_WRITE(GMBUS3 + reg_offset, val);
I915_WRITE(GMBUS1 + reg_offset, I915_WRITE(GMBUS1 + reg_offset,
(i + 1 == num ? GMBUS_CYCLE_STOP : GMBUS_CYCLE_WAIT ) | (i + 1 == num ? GMBUS_CYCLE_STOP : GMBUS_CYCLE_WAIT) |
(msgs[i].len << GMBUS_BYTE_COUNT_SHIFT) | (msgs[i].len << GMBUS_BYTE_COUNT_SHIFT) |
(msgs[i].addr << GMBUS_SLAVE_ADDR_SHIFT) | (msgs[i].addr << GMBUS_SLAVE_ADDR_SHIFT) |
GMBUS_SLAVE_WRITE | GMBUS_SW_RDY); GMBUS_SLAVE_WRITE | GMBUS_SW_RDY);
POSTING_READ(GMBUS2+reg_offset);
while (len) {
if (wait_for(I915_READ(GMBUS2 + reg_offset) & (GMBUS_SATOER | GMBUS_HW_RDY), 50))
goto timeout;
if (I915_READ(GMBUS2 + reg_offset) & GMBUS_SATOER)
return 0;
val = loop = 0;
do {
val |= *buf++ << (8 * loop);
} while (--len && ++loop < 4);
I915_WRITE(GMBUS3 + reg_offset, val);
POSTING_READ(GMBUS2+reg_offset);
}
} }
if (i + 1 < num && wait_for(I915_READ(GMBUS2 + reg_offset) & (GMBUS_SATOER | GMBUS_HW_WAIT_PHASE), 50)) if (i + 1 < num && wait_for(I915_READ(GMBUS2 + reg_offset) & (GMBUS_SATOER | GMBUS_HW_WAIT_PHASE), 50))
...@@ -279,17 +305,25 @@ gmbus_xfer(struct i2c_adapter *adapter, ...@@ -279,17 +305,25 @@ gmbus_xfer(struct i2c_adapter *adapter,
return num; return num;
timeout: timeout:
DRM_INFO("GMBUS timed out, falling back to bit banging on pin %d\n", bus->pin); DRM_INFO("GMBUS timed out, falling back to bit banging on pin %d [%s]\n",
bus->reg0 & 0xff, bus->adapter.name);
/* Hardware may not support GMBUS over these pins? Try GPIO bitbanging instead. */ /* Hardware may not support GMBUS over these pins? Try GPIO bitbanging instead. */
bus->force_bitbanging = intel_gpio_create(dev_priv, bus->pin); bus->force_bit = intel_gpio_create(dev_priv, bus->reg0 & 0xff);
if (!bus->force_bitbanging) if (!bus->force_bit)
return -ENOMEM; return -ENOMEM;
return quirk_i2c_transfer(dev_priv, bus->force_bitbanging, msgs, num); return intel_i2c_quirk_xfer(dev_priv, bus->force_bit, msgs, num);
} }
static u32 gmbus_func(struct i2c_adapter *adapter) static u32 gmbus_func(struct i2c_adapter *adapter)
{ {
struct intel_gmbus *bus = container_of(adapter,
struct intel_gmbus,
adapter);
if (bus->force_bit)
bus->force_bit->algo->functionality(bus->force_bit);
return (I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | return (I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
/* I2C_FUNC_10BIT_ADDR | */ /* I2C_FUNC_10BIT_ADDR | */
I2C_FUNC_SMBUS_READ_BLOCK_DATA | I2C_FUNC_SMBUS_READ_BLOCK_DATA |
...@@ -307,15 +341,15 @@ static const struct i2c_algorithm gmbus_algorithm = { ...@@ -307,15 +341,15 @@ static const struct i2c_algorithm gmbus_algorithm = {
*/ */
int intel_setup_gmbus(struct drm_device *dev) int intel_setup_gmbus(struct drm_device *dev)
{ {
static const char *names[] = { static const char *names[GMBUS_NUM_PORTS] = {
"disabled", "disabled",
"ssc", "ssc",
"vga", "vga",
"panel", "panel",
"dpc", "dpc",
"dpb", "dpb",
"dpd",
"reserved" "reserved"
"dpd",
}; };
struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_private *dev_priv = dev->dev_private;
int ret, i; int ret, i;
...@@ -343,7 +377,8 @@ int intel_setup_gmbus(struct drm_device *dev) ...@@ -343,7 +377,8 @@ int intel_setup_gmbus(struct drm_device *dev)
if (ret) if (ret)
goto err; goto err;
bus->pin = i; /* By default use a conservative clock rate */
bus->reg0 = i | GMBUS_RATE_100KHZ;
} }
intel_i2c_reset(dev_priv->dev); intel_i2c_reset(dev_priv->dev);
...@@ -360,6 +395,38 @@ int intel_setup_gmbus(struct drm_device *dev) ...@@ -360,6 +395,38 @@ int intel_setup_gmbus(struct drm_device *dev)
return ret; return ret;
} }
void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed)
{
struct intel_gmbus *bus = to_intel_gmbus(adapter);
/* speed:
* 0x0 = 100 KHz
* 0x1 = 50 KHz
* 0x2 = 400 KHz
* 0x3 = 1000 Khz
*/
bus->reg0 = (bus->reg0 & ~(0x3 << 8)) | (speed << 8);
}
void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit)
{
struct intel_gmbus *bus = to_intel_gmbus(adapter);
if (force_bit) {
if (bus->force_bit == NULL) {
struct drm_i915_private *dev_priv = adapter->algo_data;
bus->force_bit = intel_gpio_create(dev_priv,
bus->reg0 & 0xff);
}
} else {
if (bus->force_bit) {
i2c_del_adapter(bus->force_bit);
kfree(bus->force_bit);
bus->force_bit = NULL;
}
}
}
void intel_teardown_gmbus(struct drm_device *dev) void intel_teardown_gmbus(struct drm_device *dev)
{ {
struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_private *dev_priv = dev->dev_private;
...@@ -370,9 +437,9 @@ void intel_teardown_gmbus(struct drm_device *dev) ...@@ -370,9 +437,9 @@ void intel_teardown_gmbus(struct drm_device *dev)
for (i = 0; i < GMBUS_NUM_PORTS; i++) { for (i = 0; i < GMBUS_NUM_PORTS; i++) {
struct intel_gmbus *bus = &dev_priv->gmbus[i]; struct intel_gmbus *bus = &dev_priv->gmbus[i];
if (bus->force_bitbanging) { if (bus->force_bit) {
i2c_del_adapter(bus->force_bitbanging); i2c_del_adapter(bus->force_bit);
kfree(bus->force_bitbanging); kfree(bus->force_bit);
} }
i2c_del_adapter(&bus->adapter); i2c_del_adapter(&bus->adapter);
} }
......
drivers/gpu/drm/i915/intel_sdvo.c
浏览文件 @ e957d772
...@@ -68,6 +68,8 @@ struct intel_sdvo { ...@@ -68,6 +68,8 @@ struct intel_sdvo {
struct i2c_adapter *i2c; struct i2c_adapter *i2c;
u8 slave_addr; u8 slave_addr;
struct i2c_adapter ddc;
/* Register for the SDVO device: SDVOB or SDVOC */ /* Register for the SDVO device: SDVOB or SDVOC */
int sdvo_reg; int sdvo_reg;
...@@ -247,49 +249,29 @@ static void intel_sdvo_write_sdvox(struct intel_sdvo *intel_sdvo, u32 val) ...@@ -247,49 +249,29 @@ static void intel_sdvo_write_sdvox(struct intel_sdvo *intel_sdvo, u32 val)
static bool intel_sdvo_read_byte(struct intel_sdvo *intel_sdvo, u8 addr, u8 *ch) static bool intel_sdvo_read_byte(struct intel_sdvo *intel_sdvo, u8 addr, u8 *ch)
{ {
u8 out_buf[2] = { addr, 0 };
u8 buf[2];
struct i2c_msg msgs[] = { struct i2c_msg msgs[] = {
{ {
.addr = intel_sdvo->slave_addr >> 1, .addr = intel_sdvo->slave_addr,
.flags = 0, .flags = 0,
.len = 1, .len = 1,
.buf = out_buf, .buf = &addr,
}, },
{ {
.addr = intel_sdvo->slave_addr >> 1, .addr = intel_sdvo->slave_addr,
.flags = I2C_M_RD, .flags = I2C_M_RD,
.len = 1, .len = 1,
.buf = buf, .buf = ch,
} }
}; };
int ret; int ret;
if ((ret = i2c_transfer(intel_sdvo->i2c, msgs, 2)) == 2) if ((ret = i2c_transfer(intel_sdvo->i2c, msgs, 2)) == 2)
{
*ch = buf[0];
return true; return true;
}
DRM_DEBUG_KMS("i2c transfer returned %d\n", ret); DRM_DEBUG_KMS("i2c transfer returned %d\n", ret);
return false; return false;
} }
static bool intel_sdvo_write_byte(struct intel_sdvo *intel_sdvo, int addr, u8 ch)
{
u8 out_buf[2] = { addr, ch };
struct i2c_msg msgs[] = {
{
.addr = intel_sdvo->slave_addr >> 1,
.flags = 0,
.len = 2,
.buf = out_buf,
}
};
return i2c_transfer(intel_sdvo->i2c, msgs, 1) == 1;
}
#define SDVO_CMD_NAME_ENTRY(cmd) {cmd, #cmd} #define SDVO_CMD_NAME_ENTRY(cmd) {cmd, #cmd}
/** Mapping of command numbers to names, for debug output */ /** Mapping of command numbers to names, for debug output */
static const struct _sdvo_cmd_name { static const struct _sdvo_cmd_name {
...@@ -434,32 +416,80 @@ static void intel_sdvo_debug_write(struct intel_sdvo *intel_sdvo, u8 cmd, ...@@ -434,32 +416,80 @@ static void intel_sdvo_debug_write(struct intel_sdvo *intel_sdvo, u8 cmd,
DRM_LOG_KMS("\n"); DRM_LOG_KMS("\n");
} }
static const char *cmd_status_names[] = {
"Power on",
"Success",
"Not supported",
"Invalid arg",
"Pending",
"Target not specified",
"Scaling not supported"
};
static bool intel_sdvo_write_cmd(struct intel_sdvo *intel_sdvo, u8 cmd, static bool intel_sdvo_write_cmd(struct intel_sdvo *intel_sdvo, u8 cmd,
const void *args, int args_len) const void *args, int args_len)
{ {
int i; u8 buf[args_len*2 + 2], status;
struct i2c_msg msgs[args_len + 3];
int i, ret;
intel_sdvo_debug_write(intel_sdvo, cmd, args, args_len); intel_sdvo_debug_write(intel_sdvo, cmd, args, args_len);
for (i = 0; i < args_len; i++) { for (i = 0; i < args_len; i++) {
if (!intel_sdvo_write_byte(intel_sdvo, SDVO_I2C_ARG_0 - i, msgs[i].addr = intel_sdvo->slave_addr;
((u8*)args)[i])) msgs[i].flags = 0;
msgs[i].len = 2;
msgs[i].buf = buf + 2 *i;
buf[2*i + 0] = SDVO_I2C_ARG_0 - i;
buf[2*i + 1] = ((u8*)args)[i];
}
msgs[i].addr = intel_sdvo->slave_addr;
msgs[i].flags = 0;
msgs[i].len = 2;
msgs[i].buf = buf + 2*i;
buf[2*i + 0] = SDVO_I2C_OPCODE;
buf[2*i + 1] = cmd;
/* the following two are to read the response */
status = SDVO_I2C_CMD_STATUS;
msgs[i+1].addr = intel_sdvo->slave_addr;
msgs[i+1].flags = 0;
msgs[i+1].len = 1;
msgs[i+1].buf = &status;
msgs[i+2].addr = intel_sdvo->slave_addr;
msgs[i+2].flags = I2C_M_RD;
msgs[i+2].len = 1;
msgs[i+2].buf = &status;
ret = i2c_transfer(intel_sdvo->i2c, msgs, i+3);
if (ret < 0) {
DRM_DEBUG_KMS("I2c transfer returned %d\n", ret);
return false;
}
if (ret != i+3) {
/* failure in I2C transfer */
DRM_DEBUG_KMS("I2c transfer returned %d/%d\n", ret, i+3);
return false;
}
i = 3;
while (status == SDVO_CMD_STATUS_PENDING && i--) {
if (!intel_sdvo_read_byte(intel_sdvo,
SDVO_I2C_CMD_STATUS,
&status))
return false; return false;
} }
if (status != SDVO_CMD_STATUS_SUCCESS) {
DRM_DEBUG_KMS("command returns response %s [%d]\n",
status <= SDVO_CMD_STATUS_SCALING_NOT_SUPP ? cmd_status_names[status] : "???",
status);
return false;
}
return intel_sdvo_write_byte(intel_sdvo, SDVO_I2C_OPCODE, cmd); return true;
} }
static const char *cmd_status_names[] = {
"Power on",
"Success",
"Not supported",
"Invalid arg",
"Pending",
"Target not specified",
"Scaling not supported"
};
static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo, static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
void *response, int response_len) void *response, int response_len)
{ {
...@@ -497,13 +527,9 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo, ...@@ -497,13 +527,9 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
SDVO_I2C_RETURN_0 + i, SDVO_I2C_RETURN_0 + i,
&((u8 *)response)[i])) &((u8 *)response)[i]))
goto log_fail; goto log_fail;
DRM_LOG_KMS("%02X ", ((u8 *)response)[i]); DRM_LOG_KMS(" %02X", ((u8 *)response)[i]);
} }
for (; i < 8; i++)
DRM_LOG_KMS(" ");
DRM_LOG_KMS("\n"); DRM_LOG_KMS("\n");
return true; return true;
log_fail: log_fail:
...@@ -521,75 +547,17 @@ static int intel_sdvo_get_pixel_multiplier(struct drm_display_mode *mode) ...@@ -521,75 +547,17 @@ static int intel_sdvo_get_pixel_multiplier(struct drm_display_mode *mode)
return 4; return 4;
} }
/** static bool intel_sdvo_set_control_bus_switch(struct intel_sdvo *intel_sdvo,
* Try to read the response after issuie the DDC switch command. But it u8 ddc_bus)
* is noted that we must do the action of reading response and issuing DDC
* switch command in one I2C transaction. Otherwise when we try to start
* another I2C transaction after issuing the DDC bus switch, it will be
* switched to the internal SDVO register.
*/
static int intel_sdvo_set_control_bus_switch(struct intel_sdvo *intel_sdvo,
u8 target)
{ {
u8 out_buf[2], cmd_buf[2], ret_value[2], ret; return intel_sdvo_write_cmd(intel_sdvo,
struct i2c_msg msgs[] = { SDVO_CMD_SET_CONTROL_BUS_SWITCH,
{ &ddc_bus, 1);
.addr = intel_sdvo->slave_addr >> 1,
.flags = 0,
.len = 2,
.buf = out_buf,
},
/* the following two are to read the response */
{
.addr = intel_sdvo->slave_addr >> 1,
.flags = 0,
.len = 1,
.buf = cmd_buf,
},
{
.addr = intel_sdvo->slave_addr >> 1,
.flags = I2C_M_RD,
.len = 1,
.buf = ret_value,
},
};
intel_sdvo_debug_write(intel_sdvo, SDVO_CMD_SET_CONTROL_BUS_SWITCH,
&target, 1);
/* write the DDC switch command argument */
if (!intel_sdvo_write_byte(intel_sdvo, SDVO_I2C_ARG_0, target))
return -EIO;
out_buf[0] = SDVO_I2C_OPCODE;
out_buf[1] = SDVO_CMD_SET_CONTROL_BUS_SWITCH;
cmd_buf[0] = SDVO_I2C_CMD_STATUS;
cmd_buf[1] = 0;
ret_value[0] = 0;
ret_value[1] = 0;
ret = i2c_transfer(intel_sdvo->i2c, msgs, 3);
if (ret < 0)
return ret;
if (ret != 3) {
/* failure in I2C transfer */
DRM_DEBUG_KMS("I2c transfer returned %d\n", ret);
return -EIO;
}
if (ret_value[0] != SDVO_CMD_STATUS_SUCCESS) {
DRM_DEBUG_KMS("DDC switch command returns response %d\n",
ret_value[0]);
return -EIO;
}
return 0;
} }
static bool intel_sdvo_set_value(struct intel_sdvo *intel_sdvo, u8 cmd, const void *data, int len) static bool intel_sdvo_set_value(struct intel_sdvo *intel_sdvo, u8 cmd, const void *data, int len)
{ {
if (!intel_sdvo_write_cmd(intel_sdvo, cmd, data, len)) return intel_sdvo_write_cmd(intel_sdvo, cmd, data, len);
return false;
return intel_sdvo_read_response(intel_sdvo, NULL, 0);
} }
static bool static bool
...@@ -1272,7 +1240,38 @@ static int intel_sdvo_mode_valid(struct drm_connector *connector, ...@@ -1272,7 +1240,38 @@ static int intel_sdvo_mode_valid(struct drm_connector *connector,
static bool intel_sdvo_get_capabilities(struct intel_sdvo *intel_sdvo, struct intel_sdvo_caps *caps) static bool intel_sdvo_get_capabilities(struct intel_sdvo *intel_sdvo, struct intel_sdvo_caps *caps)
{ {
return intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_DEVICE_CAPS, caps, sizeof(*caps)); if (!intel_sdvo_get_value(intel_sdvo,
SDVO_CMD_GET_DEVICE_CAPS,
caps, sizeof(*caps)))
return false;
DRM_DEBUG_KMS("SDVO capabilities:\n"
" vendor_id: %d\n"
" device_id: %d\n"
" device_rev_id: %d\n"
" sdvo_version_major: %d\n"
" sdvo_version_minor: %d\n"
" sdvo_inputs_mask: %d\n"
" smooth_scaling: %d\n"
" sharp_scaling: %d\n"
" up_scaling: %d\n"
" down_scaling: %d\n"
" stall_support: %d\n"
" output_flags: %d\n",
caps->vendor_id,
caps->device_id,
caps->device_rev_id,
caps->sdvo_version_major,
caps->sdvo_version_minor,
caps->sdvo_inputs_mask,
caps->smooth_scaling,
caps->sharp_scaling,
caps->up_scaling,
caps->down_scaling,
caps->stall_support,
caps->output_flags);
return true;
} }
/* No use! */ /* No use! */
...@@ -1377,16 +1376,10 @@ intel_sdvo_multifunc_encoder(struct intel_sdvo *intel_sdvo) ...@@ -1377,16 +1376,10 @@ intel_sdvo_multifunc_encoder(struct intel_sdvo *intel_sdvo)
} }
static struct edid * static struct edid *
intel_sdvo_get_edid(struct drm_connector *connector, int ddc) intel_sdvo_get_edid(struct drm_connector *connector)
{ {
struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector); struct intel_sdvo *sdvo = intel_attached_sdvo(connector);
int ret; return drm_get_edid(connector, &sdvo->ddc);
ret = intel_sdvo_set_control_bus_switch(intel_sdvo, ddc);
if (ret)
return NULL;
return drm_get_edid(connector, intel_sdvo->i2c);
} }
static struct drm_connector * static struct drm_connector *
...@@ -1447,26 +1440,27 @@ intel_sdvo_hdmi_sink_detect(struct drm_connector *connector) ...@@ -1447,26 +1440,27 @@ intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
enum drm_connector_status status; enum drm_connector_status status;
struct edid *edid; struct edid *edid;
edid = intel_sdvo_get_edid(connector, intel_sdvo->ddc_bus); edid = intel_sdvo_get_edid(connector);
if (edid == NULL && intel_sdvo_multifunc_encoder(intel_sdvo)) { if (edid == NULL && intel_sdvo_multifunc_encoder(intel_sdvo)) {
u8 ddc; u8 ddc, saved_ddc = intel_sdvo->ddc_bus;
/* /*
* Don't use the 1 as the argument of DDC bus switch to get * Don't use the 1 as the argument of DDC bus switch to get
* the EDID. It is used for SDVO SPD ROM. * the EDID. It is used for SDVO SPD ROM.
*/ */
for (ddc = intel_sdvo->ddc_bus >> 1; ddc > 1; ddc >>= 1) { for (ddc = intel_sdvo->ddc_bus >> 1; ddc > 1; ddc >>= 1) {
edid = intel_sdvo_get_edid(connector, ddc); intel_sdvo->ddc_bus = ddc;
if (edid) { edid = intel_sdvo_get_edid(connector);
/* if (edid)
* If we found the EDID on the other bus,
* assume that is the correct DDC bus.
*/
intel_sdvo->ddc_bus = ddc;
break; break;
}
} }
/*
* If we found the EDID on the other bus,
* assume that is the correct DDC bus.
*/
if (edid == NULL)
intel_sdvo->ddc_bus = saved_ddc;
} }
/* /*
...@@ -1499,7 +1493,7 @@ intel_sdvo_detect(struct drm_connector *connector, bool force) ...@@ -1499,7 +1493,7 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
enum drm_connector_status ret; enum drm_connector_status ret;
if (!intel_sdvo_write_cmd(intel_sdvo, if (!intel_sdvo_write_cmd(intel_sdvo,
SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0)) SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0))
return connector_status_unknown; return connector_status_unknown;
if (intel_sdvo->is_tv) { if (intel_sdvo->is_tv) {
/* add 30ms delay when the output type is SDVO-TV */ /* add 30ms delay when the output type is SDVO-TV */
...@@ -1508,7 +1502,9 @@ intel_sdvo_detect(struct drm_connector *connector, bool force) ...@@ -1508,7 +1502,9 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
if (!intel_sdvo_read_response(intel_sdvo, &response, 2)) if (!intel_sdvo_read_response(intel_sdvo, &response, 2))
return connector_status_unknown; return connector_status_unknown;
DRM_DEBUG_KMS("SDVO response %d %d\n", response & 0xff, response >> 8); DRM_DEBUG_KMS("SDVO response %d %d [%x]\n",
response & 0xff, response >> 8,
intel_sdvo_connector->output_flag);
if (response == 0) if (response == 0)
return connector_status_disconnected; return connector_status_disconnected;
...@@ -1541,11 +1537,10 @@ intel_sdvo_detect(struct drm_connector *connector, bool force) ...@@ -1541,11 +1537,10 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
static void intel_sdvo_get_ddc_modes(struct drm_connector *connector) static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
{ {
struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
struct edid *edid; struct edid *edid;
/* set the bus switch and get the modes */ /* set the bus switch and get the modes */
edid = intel_sdvo_get_edid(connector, intel_sdvo->ddc_bus); edid = intel_sdvo_get_edid(connector);
/* /*
* Mac mini hack. On this device, the DVI-I connector shares one DDC * Mac mini hack. On this device, the DVI-I connector shares one DDC
...@@ -1647,7 +1642,8 @@ static void intel_sdvo_get_tv_modes(struct drm_connector *connector) ...@@ -1647,7 +1642,8 @@ static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
return; return;
BUILD_BUG_ON(sizeof(tv_res) != 3); BUILD_BUG_ON(sizeof(tv_res) != 3);
if (!intel_sdvo_write_cmd(intel_sdvo, SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT, if (!intel_sdvo_write_cmd(intel_sdvo,
SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT,
&tv_res, sizeof(tv_res))) &tv_res, sizeof(tv_res)))
return; return;
if (!intel_sdvo_read_response(intel_sdvo, &reply, 3)) if (!intel_sdvo_read_response(intel_sdvo, &reply, 3))
...@@ -1924,6 +1920,7 @@ static void intel_sdvo_enc_destroy(struct drm_encoder *encoder) ...@@ -1924,6 +1920,7 @@ static void intel_sdvo_enc_destroy(struct drm_encoder *encoder)
drm_mode_destroy(encoder->dev, drm_mode_destroy(encoder->dev,
intel_sdvo->sdvo_lvds_fixed_mode); intel_sdvo->sdvo_lvds_fixed_mode);
i2c_del_adapter(&intel_sdvo->ddc);
intel_encoder_destroy(encoder); intel_encoder_destroy(encoder);
} }
...@@ -1991,6 +1988,30 @@ intel_sdvo_select_ddc_bus(struct drm_i915_private *dev_priv, ...@@ -1991,6 +1988,30 @@ intel_sdvo_select_ddc_bus(struct drm_i915_private *dev_priv,
intel_sdvo_guess_ddc_bus(sdvo); intel_sdvo_guess_ddc_bus(sdvo);
} }
static void
intel_sdvo_select_i2c_bus(struct drm_i915_private *dev_priv,
struct intel_sdvo *sdvo, u32 reg)
{
struct sdvo_device_mapping *mapping;
u8 pin, speed;
if (IS_SDVOB(reg))
mapping = &dev_priv->sdvo_mappings[0];
else
mapping = &dev_priv->sdvo_mappings[1];
pin = GMBUS_PORT_DPB;
speed = GMBUS_RATE_1MHZ >> 8;
if (mapping->initialized) {
pin = mapping->i2c_pin;
speed = mapping->i2c_speed;
}
sdvo->i2c = &dev_priv->gmbus[pin].adapter;
intel_gmbus_set_speed(sdvo->i2c, speed);
intel_gmbus_force_bit(sdvo->i2c, true);
}
static bool static bool
intel_sdvo_get_digital_encoding_mode(struct intel_sdvo *intel_sdvo, int device) intel_sdvo_get_digital_encoding_mode(struct intel_sdvo *intel_sdvo, int device)
{ {
...@@ -2504,7 +2525,43 @@ static bool intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo, ...@@ -2504,7 +2525,43 @@ static bool intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo,
return intel_sdvo_create_enhance_property_lvds(intel_sdvo, intel_sdvo_connector, enhancements.reply); return intel_sdvo_create_enhance_property_lvds(intel_sdvo, intel_sdvo_connector, enhancements.reply);
else else
return true; return true;
}
static int intel_sdvo_ddc_proxy_xfer(struct i2c_adapter *adapter,
struct i2c_msg *msgs,
int num)
{
struct intel_sdvo *sdvo = adapter->algo_data;
if (!intel_sdvo_set_control_bus_switch(sdvo, sdvo->ddc_bus))
return -EIO;
return sdvo->i2c->algo->master_xfer(sdvo->i2c, msgs, num);
}
static u32 intel_sdvo_ddc_proxy_func(struct i2c_adapter *adapter)
{
struct intel_sdvo *sdvo = adapter->algo_data;
return sdvo->i2c->algo->functionality(sdvo->i2c);
}
static const struct i2c_algorithm intel_sdvo_ddc_proxy = {
.master_xfer = intel_sdvo_ddc_proxy_xfer,
.functionality = intel_sdvo_ddc_proxy_func
};
static bool
intel_sdvo_init_ddc_proxy(struct intel_sdvo *sdvo,
struct drm_device *dev)
{
sdvo->ddc.owner = THIS_MODULE;
sdvo->ddc.class = I2C_CLASS_DDC;
snprintf(sdvo->ddc.name, I2C_NAME_SIZE, "SDVO DDC proxy");
sdvo->ddc.dev.parent = &dev->pdev->dev;
sdvo->ddc.algo_data = sdvo;
sdvo->ddc.algo = &intel_sdvo_ddc_proxy;
return i2c_add_adapter(&sdvo->ddc) == 0;
} }
bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg) bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg)
...@@ -2518,6 +2575,11 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg) ...@@ -2518,6 +2575,11 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg)
if (!intel_sdvo) if (!intel_sdvo)
return false; return false;
if (!intel_sdvo_init_ddc_proxy(intel_sdvo, dev)) {
kfree(intel_sdvo);
return false;
}
intel_sdvo->sdvo_reg = sdvo_reg; intel_sdvo->sdvo_reg = sdvo_reg;
intel_encoder = &intel_sdvo->base; intel_encoder = &intel_sdvo->base;
...@@ -2525,9 +2587,8 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg) ...@@ -2525,9 +2587,8 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg)
/* encoder type will be decided later */ /* encoder type will be decided later */
drm_encoder_init(dev, &intel_encoder->base, &intel_sdvo_enc_funcs, 0); drm_encoder_init(dev, &intel_encoder->base, &intel_sdvo_enc_funcs, 0);
intel_sdvo->i2c = &dev_priv->gmbus[GMBUS_PORT_DPB].adapter; intel_sdvo->slave_addr = intel_sdvo_get_slave_addr(dev, sdvo_reg) >> 1;
intel_sdvo_select_i2c_bus(dev_priv, intel_sdvo, sdvo_reg);
intel_sdvo->slave_addr = intel_sdvo_get_slave_addr(dev, sdvo_reg);
/* Read the regs to test if we can talk to the device */ /* Read the regs to test if we can talk to the device */
for (i = 0; i < 0x40; i++) { for (i = 0; i < 0x40; i++) {
...@@ -2589,6 +2650,7 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg) ...@@ -2589,6 +2650,7 @@ bool intel_sdvo_init(struct drm_device *dev, int sdvo_reg)
err: err:
drm_encoder_cleanup(&intel_encoder->base); drm_encoder_cleanup(&intel_encoder->base);
i2c_del_adapter(&intel_sdvo->ddc);
kfree(intel_sdvo); kfree(intel_sdvo);
return false; return false;
......
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