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path: root/drivers/gpu/drm/radeon/radeon_i2c.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_i2c.c73
1 files changed, 56 insertions, 17 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index 6c645fb4dad..da3da1e89d0 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -69,13 +69,15 @@ void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
* holds the i2c port in a bad state - switch hw i2c away before
* doing DDC - do this for all r200s/r300s/r400s for safety sake
*/
- if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
- if (rec->a_clk_reg == RADEON_GPIO_MONID) {
- WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
- R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
- } else {
- WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
- R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
+ if (rec->hw_capable) {
+ if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
+ if (rec->a_clk_reg == RADEON_GPIO_MONID) {
+ WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
+ R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
+ } else {
+ WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
+ R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
+ }
}
}
@@ -86,6 +88,12 @@ void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
WREG32(rec->a_data_reg, temp);
+ /* set the pins to input */
+ temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
+ WREG32(rec->en_clk_reg, temp);
+
+ temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
+ WREG32(rec->en_data_reg, temp);
/* mask the gpio pins for software use */
temp = RREG32(rec->mask_clk_reg);
@@ -172,20 +180,19 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
return NULL;
i2c->adapter.owner = THIS_MODULE;
- i2c->adapter.algo_data = &i2c->algo;
i2c->dev = dev;
- i2c->algo.setsda = set_data;
- i2c->algo.setscl = set_clock;
- i2c->algo.getsda = get_data;
- i2c->algo.getscl = get_clock;
- i2c->algo.udelay = 20;
+ i2c_set_adapdata(&i2c->adapter, i2c);
+ i2c->adapter.algo_data = &i2c->algo.bit;
+ i2c->algo.bit.setsda = set_data;
+ i2c->algo.bit.setscl = set_clock;
+ i2c->algo.bit.getsda = get_data;
+ i2c->algo.bit.getscl = get_clock;
+ i2c->algo.bit.udelay = 20;
/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
* make this, 2 jiffies is a lot more reliable */
- i2c->algo.timeout = 2;
- i2c->algo.data = i2c;
+ i2c->algo.bit.timeout = 2;
+ i2c->algo.bit.data = i2c;
i2c->rec = *rec;
- i2c_set_adapdata(&i2c->adapter, i2c);
-
ret = i2c_bit_add_bus(&i2c->adapter);
if (ret) {
DRM_INFO("Failed to register i2c %s\n", name);
@@ -199,6 +206,38 @@ out_free:
}
+struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
+ struct radeon_i2c_bus_rec *rec,
+ const char *name)
+{
+ struct radeon_i2c_chan *i2c;
+ int ret;
+
+ i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
+ if (i2c == NULL)
+ return NULL;
+
+ i2c->rec = *rec;
+ i2c->adapter.owner = THIS_MODULE;
+ i2c->dev = dev;
+ i2c_set_adapdata(&i2c->adapter, i2c);
+ i2c->adapter.algo_data = &i2c->algo.dp;
+ i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;
+ i2c->algo.dp.address = 0;
+ ret = i2c_dp_aux_add_bus(&i2c->adapter);
+ if (ret) {
+ DRM_INFO("Failed to register i2c %s\n", name);
+ goto out_free;
+ }
+
+ return i2c;
+out_free:
+ kfree(i2c);
+ return NULL;
+
+}
+
+
void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
{
if (!i2c)