From 0e384803c5f2528735e43b8d30f90ea82f6b3f47 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Thu, 18 Sep 2008 10:13:30 +1000 Subject: radeon: don't do full edid for detection purposes --- linux-core/radeon_i2c.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'linux-core/radeon_i2c.c') diff --git a/linux-core/radeon_i2c.c b/linux-core/radeon_i2c.c index 00fc7c0e..94a485ba 100644 --- a/linux-core/radeon_i2c.c +++ b/linux-core/radeon_i2c.c @@ -27,6 +27,38 @@ #include "radeon_drm.h" #include "radeon_drv.h" +/** + * radeon_ddc_probe + * + */ +bool radeon_ddc_probe(struct radeon_connector *radeon_connector) +{ + u8 out_buf[] = { 0x0, 0x0}; + u8 buf[2]; + int ret; + struct i2c_msg msgs[] = { + { + .addr = 0x50, + .flags = 0, + .len = 1, + .buf = out_buf, + }, + { + .addr = 0x50, + .flags = I2C_M_RD, + .len = 1, + .buf = buf, + } + }; + + ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); + if (ret == 2) + return true; + + return false; +} + + void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state) { struct drm_radeon_private *dev_priv = radeon_connector->base.dev->dev_private; @@ -161,3 +193,4 @@ struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) { return NULL; } + -- cgit v1.2.3