diff options
Diffstat (limited to 'linux-core/nv50_dac.c')
| -rw-r--r-- | linux-core/nv50_dac.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/linux-core/nv50_dac.c b/linux-core/nv50_dac.c index ca4bb5e1..3f007166 100644 --- a/linux-core/nv50_dac.c +++ b/linux-core/nv50_dac.c @@ -133,6 +133,39 @@ static int nv50_dac_set_power_mode(struct nv50_output *output, int mode) return 0; } +static int nv50_dac_detect(struct nv50_output *output) +{ + struct drm_nouveau_private *dev_priv = output->dev->dev_private; + int or = nv50_output_or_offset(output); + bool present = 0; + uint32_t dpms_state, load_pattern, load_state; + + NV_WRITE(NV50_PDISPLAY_DAC_REGS_CLK_CTRL1(or), 0x00000001); + dpms_state = NV_READ(NV50_PDISPLAY_DAC_REGS_DPMS_CTRL(or)); + + NV_WRITE(NV50_PDISPLAY_DAC_REGS_DPMS_CTRL(or), 0x00150000 | NV50_PDISPLAY_DAC_REGS_DPMS_CTRL_PENDING); + while (NV_READ(NV50_PDISPLAY_DAC_REGS_DPMS_CTRL(or)) & NV50_PDISPLAY_DAC_REGS_DPMS_CTRL_PENDING); + + load_pattern = 340; /* TODO: use a bios table for this */ + + NV_WRITE(NV50_PDISPLAY_DAC_REGS_LOAD_CTRL(or), NV50_PDISPLAY_DAC_REGS_LOAD_CTRL_ACTIVE | load_pattern); + udelay(10000); /* give it some time to process */ + load_state = NV_READ(NV50_PDISPLAY_DAC_REGS_LOAD_CTRL(or)); + + NV_WRITE(NV50_PDISPLAY_DAC_REGS_LOAD_CTRL(or), 0); + NV_WRITE(NV50_PDISPLAY_DAC_REGS_DPMS_CTRL(or), dpms_state); + + if ((load_state & NV50_PDISPLAY_DAC_REGS_LOAD_CTRL_PRESENT) == NV50_PDISPLAY_DAC_REGS_LOAD_CTRL_PRESENT) + present = 1; + + if (present) + NV50_DEBUG("Load was detected on output with or %d\n", or); + else + NV50_DEBUG("Load was not detected on output with or %d\n", or); + + return present; +} + static int nv50_dac_destroy(struct nv50_output *output) { struct drm_device *dev = output->dev; @@ -210,7 +243,7 @@ int nv50_dac_create(struct drm_device *dev, int dcb_entry) output->execute_mode = nv50_dac_execute_mode; output->set_clock_mode = nv50_dac_set_clock_mode; output->set_power_mode = nv50_dac_set_power_mode; - output->detect = NULL; /* TODO */ + output->detect = nv50_dac_detect; output->destroy = nv50_dac_destroy; return 0; |