diff options
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv04_dfp.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/drivers/gpu/drm/nouveau/nv04_dfp.c b/drivers/gpu/drm/nouveau/nv04_dfp.c index 9871570d2ff4..a5dcf7685800 100644 --- a/drivers/gpu/drm/nouveau/nv04_dfp.c +++ b/drivers/gpu/drm/nouveau/nv04_dfp.c @@ -146,6 +146,36 @@ void nv04_dfp_update_fp_control(struct drm_encoder *encoder, int mode) } } +static struct drm_encoder *get_tmds_slave(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb; + struct drm_encoder *slave; + + if (dcb->type != OUTPUT_TMDS || dcb->location == DCB_LOC_ON_CHIP) + return NULL; + + /* Some BIOSes (e.g. the one in a Quadro FX1000) report several + * TMDS transmitters at the same I2C address, in the same I2C + * bus. This can still work because in that case one of them is + * always hard-wired to a reasonable configuration using straps, + * and the other one needs to be programmed. + * + * I don't think there's a way to know which is which, even the + * blob programs the one exposed via I2C for *both* heads, so + * let's do the same. + */ + list_for_each_entry(slave, &dev->mode_config.encoder_list, head) { + struct dcb_entry *slave_dcb = nouveau_encoder(slave)->dcb; + + if (slave_dcb->type == OUTPUT_TMDS && get_slave_funcs(slave) && + slave_dcb->tmdsconf.slave_addr == dcb->tmdsconf.slave_addr) + return slave; + } + + return NULL; +} + static bool nv04_dfp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) @@ -432,9 +462,9 @@ static void nv04_dfp_commit(struct drm_encoder *encoder) NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0x00100000); /* Init external transmitters */ - if (get_slave_funcs(encoder)) - get_slave_funcs(encoder)->mode_set(encoder, &nv_encoder->mode, - &nv_encoder->mode); + if (get_tmds_slave(encoder)) + get_slave_funcs(get_tmds_slave(encoder))->mode_set( + encoder, &nv_encoder->mode, &nv_encoder->mode); helper->dpms(encoder, DRM_MODE_DPMS_ON); @@ -581,7 +611,8 @@ static void nv04_tmds_slave_init(struct drm_encoder *encoder) }; int type; - if (!nv_gf4_disp_arch(dev) || !i2c) + if (!nv_gf4_disp_arch(dev) || !i2c || + get_tmds_slave(encoder)) return; type = nouveau_i2c_identify(dev, "TMDS transmitter", info, 2); |