+bool radeon_combios_get_primary_dac_info(struct radeon_encoder *encoder)
+{
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_radeon_private *dev_priv = dev->dev_private;
+ uint16_t dac_info;
+ uint8_t rev, bg, dac;
+
+ /* check CRT table */
+ dac_info = combios_get_table_offset(dev, COMBIOS_CRT_INFO_TABLE);
+ if (dac_info) {
+ rev = radeon_bios8(dev_priv, dac_info) & 0x3;
+ if (rev < 2) {
+ bg = radeon_bios8(dev_priv, dac_info + 0x2) & 0xf;
+ dac = (radeon_bios8(dev_priv, dac_info + 0x2) >> 4) & 0xf;
+ encoder->ps2_pdac_adj = (bg << 8) | (dac);
+
+ return true;
+ } else {
+ bg = radeon_bios8(dev_priv, dac_info + 0x2) & 0xf;
+ dac = radeon_bios8(dev_priv, dac_info + 0x3) & 0xf;
+ encoder->ps2_pdac_adj = (bg << 8) | (dac);
+
+ return true;
+ }
+
+ }
+
+ return false;
+}
+