diff options
Diffstat (limited to 'linux-core/radeon_combios.c')
| -rw-r--r-- | linux-core/radeon_combios.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/linux-core/radeon_combios.c b/linux-core/radeon_combios.c index e2b768ca..8a1dd8b3 100644 --- a/linux-core/radeon_combios.c +++ b/linux-core/radeon_combios.c @@ -175,6 +175,45 @@ bool radeon_combios_get_lvds_info(struct radeon_encoder *encoder) return true; } +bool radeon_combios_get_tmds_info(struct radeon_encoder *encoder) +{ + struct drm_device *dev = encoder->base.dev; + struct drm_radeon_private *dev_priv = dev->dev_private; + uint16_t tmp; + int i, n; + uint8_t ver; + + tmp = radeon_bios16(dev_priv, dev_priv->bios_header_start + 0x34); + if (!tmp) { + DRM_INFO("No TMDS info found in BIOS\n"); + return false; + } + + ver = radeon_bios8(dev_priv, tmp); + DRM_INFO("DFP table revision: %d\n", ver); + if (ver == 3) { + n = radeon_bios8(dev_priv, tmp + 5) + 1; + if (n > 4) n = 4; + for (i = 0; i < n; i++) { + encoder->tmds_pll[i].value = radeon_bios32(dev_priv, tmp+i*10+0x08); + encoder->tmds_pll[i].freq = radeon_bios16(dev_priv, tmp+i*10+0x10); + } + return true; + } else if (ver == 4) { + int stride = 0; + n = radeon_bios8(dev_priv, tmp + 5) + 1; + if (n > 4) n = 4; + for (i = 0; i < n; i++) { + encoder->tmds_pll[i].value = radeon_bios32(dev_priv, tmp+stride+0x08); + encoder->tmds_pll[i].freq = radeon_bios16(dev_priv, tmp+stride+0x10); + if (i == 0) stride += 10; + else stride += 6; + } + return true; + } + return false; +} + static void radeon_apply_legacy_quirks(struct drm_device *dev, int bios_index) { struct drm_radeon_private *dev_priv = dev->dev_private; |