+
+#ifdef CONFIG_PMAC_BACKLIGHT
+
+/* TODO: Dbl check these tables, we don't go up to full ON backlight
+ * in these, possibly because we noticed MacOS doesn't, but I'd prefer
+ * having some more official numbers from ATI
+ */
+static int backlight_conv_m6[] = {
+ 0xff, 0xc0, 0xb5, 0xaa, 0x9f, 0x94, 0x89, 0x7e,
+ 0x73, 0x68, 0x5d, 0x52, 0x47, 0x3c, 0x31, 0x24
+};
+static int backlight_conv_m7[] = {
+ 0x00, 0x3f, 0x4a, 0x55, 0x60, 0x6b, 0x76, 0x81,
+ 0x8c, 0x97, 0xa2, 0xad, 0xb8, 0xc3, 0xce, 0xd9
+};
+
+#define BACKLIGHT_LVDS_OFF
+#undef BACKLIGHT_DAC_OFF
+
+/* We turn off the LCD completely instead of just dimming the backlight.
+ * This provides some greater power saving and the display is useless
+ * without backlight anyway.
+ */
+static int radeon_set_backlight_enable(int on, int level, void *data)
+{
+ struct radeonfb_info *rinfo = (struct radeonfb_info *)data;
+ u32 lvds_gen_cntl, tmpPixclksCntl;
+ int* conv_table;
+
+ if (rinfo->mon1_type != MT_LCD)
+ return 0;
+
+ /* Pardon me for that hack... maybe some day we can figure
+ * out in what direction backlight should work on a given
+ * panel ?
+ */
+ if ((rinfo->family == CHIP_FAMILY_RV200 ||
+ rinfo->family == CHIP_FAMILY_RV250 ||
+ rinfo->family == CHIP_FAMILY_RV280 ||
+ rinfo->family == CHIP_FAMILY_RV350) &&
+ !machine_is_compatible("PowerBook4,3") &&
+ !machine_is_compatible("PowerBook6,3") &&
+ !machine_is_compatible("PowerBook6,5"))
+ conv_table = backlight_conv_m7;
+ else
+ conv_table = backlight_conv_m6;
+
+ del_timer_sync(&rinfo->lvds_timer);
+ radeon_engine_idle();
+
+ lvds_gen_cntl = INREG(LVDS_GEN_CNTL);
+ if (on && (level > BACKLIGHT_OFF)) {
+ lvds_gen_cntl &= ~LVDS_DISPLAY_DIS;
+ if (!(lvds_gen_cntl & LVDS_BLON) || !(lvds_gen_cntl & LVDS_ON)) {
+ lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_DIGON);
+ lvds_gen_cntl |= LVDS_BLON | LVDS_EN;
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
+ lvds_gen_cntl |= (conv_table[level] <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ lvds_gen_cntl |= LVDS_ON;
+ lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_BL_MOD_EN);
+ rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
+ mod_timer(&rinfo->lvds_timer,
+ jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
+ } else {
+ lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
+ lvds_gen_cntl |= (conv_table[level] <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ }
+ rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
+ rinfo->init_state.lvds_gen_cntl |= rinfo->pending_lvds_gen_cntl
+ & LVDS_STATE_MASK;
+ } else {
+ /* Asic bug, when turning off LVDS_ON, we have to make sure
+ RADEON_PIXCLK_LVDS_ALWAYS_ON bit is off
+ */
+ tmpPixclksCntl = INPLL(PIXCLKS_CNTL);
+ if (rinfo->is_mobility || rinfo->is_IGP)
+ OUTPLLP(PIXCLKS_CNTL, 0, ~PIXCLK_LVDS_ALWAYS_ONb);
+ lvds_gen_cntl &= ~(LVDS_BL_MOD_LEVEL_MASK | LVDS_BL_MOD_EN);
+ lvds_gen_cntl |= (conv_table[0] <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ lvds_gen_cntl |= LVDS_DISPLAY_DIS;
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ udelay(100);
+ lvds_gen_cntl &= ~(LVDS_ON | LVDS_EN);
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ lvds_gen_cntl &= ~(LVDS_DIGON);
+ rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
+ mod_timer(&rinfo->lvds_timer,
+ jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
+ if (rinfo->is_mobility || rinfo->is_IGP)
+ OUTPLL(PIXCLKS_CNTL, tmpPixclksCntl);
+ }
+ rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
+ rinfo->init_state.lvds_gen_cntl |= (lvds_gen_cntl & LVDS_STATE_MASK);
+
+ return 0;
+}
+
+
+static int radeon_set_backlight_level(int level, void *data)
+{
+ return radeon_set_backlight_enable(1, level, data);
+}
+#endif /* CONFIG_PMAC_BACKLIGHT */
+
+