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author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-09-28 23:33:17 +0100 |
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committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-09-28 23:33:17 +0100 |
commit | a8ed0b16a924a59b56906e83d6c033a04a9818f6 (patch) | |
tree | 125d98b944c25394683a66523f99a918c9139a95 /drivers/gpu/drm/i915/dvo_ch7017.c | |
parent | b8232e906381dcba2bb26f0d849d4c25cc9b1368 (diff) | |
download | linux-stable-a8ed0b16a924a59b56906e83d6c033a04a9818f6.tar.gz linux-stable-a8ed0b16a924a59b56906e83d6c033a04a9818f6.tar.bz2 linux-stable-a8ed0b16a924a59b56906e83d6c033a04a9818f6.zip |
drm/i915: Tidy dvo_ch7017 and print out which chip we detect
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/dvo_ch7017.c')
-rw-r--r-- | drivers/gpu/drm/i915/dvo_ch7017.c | 63 |
1 files changed, 27 insertions, 36 deletions
diff --git a/drivers/gpu/drm/i915/dvo_ch7017.c b/drivers/gpu/drm/i915/dvo_ch7017.c index 0bc8ce1ad9aa..af70337567ce 100644 --- a/drivers/gpu/drm/i915/dvo_ch7017.c +++ b/drivers/gpu/drm/i915/dvo_ch7017.c @@ -165,56 +165,35 @@ struct ch7017_priv { static void ch7017_dump_regs(struct intel_dvo_device *dvo); static void ch7017_dpms(struct intel_dvo_device *dvo, int mode); -static bool ch7017_read(struct intel_dvo_device *dvo, int addr, uint8_t *val) +static bool ch7017_read(struct intel_dvo_device *dvo, u8 addr, u8 *val) { - struct i2c_adapter *adapter = dvo->i2c_bus; - u8 out_buf[2]; - u8 in_buf[2]; - struct i2c_msg msgs[] = { { .addr = dvo->slave_addr, .flags = 0, .len = 1, - .buf = out_buf, + .buf = &addr, }, { .addr = dvo->slave_addr, .flags = I2C_M_RD, .len = 1, - .buf = in_buf, + .buf = val, } }; - - out_buf[0] = addr; - out_buf[1] = 0; - - if (i2c_transfer(adapter, msgs, 2) == 2) { - *val= in_buf[0]; - return true; - }; - - return false; + return i2c_transfer(dvo->i2c_bus, msgs, 2) == 2; } -static bool ch7017_write(struct intel_dvo_device *dvo, int addr, uint8_t val) +static bool ch7017_write(struct intel_dvo_device *dvo, u8 addr, u8 val) { - struct i2c_adapter *adapter = dvo->i2c_bus; - uint8_t out_buf[2]; + uint8_t buf[2] = { addr, val }; struct i2c_msg msg = { .addr = dvo->slave_addr, .flags = 0, .len = 2, - .buf = out_buf, + .buf = buf, }; - - out_buf[0] = addr; - out_buf[1] = val; - - if (i2c_transfer(adapter, &msg, 1) == 1) - return true; - - return false; + return i2c_transfer(dvo->i2c_bus, &msg, 1) == 1; } /** Probes for a CH7017 on the given bus and slave address. */ @@ -222,7 +201,8 @@ static bool ch7017_init(struct intel_dvo_device *dvo, struct i2c_adapter *adapter) { struct ch7017_priv *priv; - uint8_t val; + const char *str; + u8 val; priv = kzalloc(sizeof(struct ch7017_priv), GFP_KERNEL); if (priv == NULL) @@ -234,16 +214,27 @@ static bool ch7017_init(struct intel_dvo_device *dvo, if (!ch7017_read(dvo, CH7017_DEVICE_ID, &val)) goto fail; - if (val != CH7017_DEVICE_ID_VALUE && - val != CH7018_DEVICE_ID_VALUE && - val != CH7019_DEVICE_ID_VALUE) { + switch (val) { + case CH7017_DEVICE_ID_VALUE: + str = "ch7017"; + break; + case CH7018_DEVICE_ID_VALUE: + str = "ch7018"; + break; + case CH7019_DEVICE_ID_VALUE: + str = "ch7019"; + break; + default: DRM_DEBUG_KMS("ch701x not detected, got %d: from %s " - "Slave %d.\n", - val, adapter->name,dvo->slave_addr); + "slave %d.\n", + val, adapter->name,dvo->slave_addr); goto fail; } + DRM_DEBUG_KMS("%s detected on %s, addr %d\n", + str, adapter->name, dvo->slave_addr); return true; + fail: kfree(priv); return false; @@ -365,7 +356,7 @@ static void ch7017_dpms(struct intel_dvo_device *dvo, int mode) } /* XXX: Should actually wait for update power status somehow */ - udelay(20000); + msleep(20); } static void ch7017_dump_regs(struct intel_dvo_device *dvo) |