drm/radeon: Fully initialize LVDS info also when we can't get it from the ROM.

This makes the panel on my PowerBook light up.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 06e8038bc4ac..afc4db280b94 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -799,6 +799,7 @@ static struct radeon_encoder_lvds *radeon_legacy_get_lvds_info_from_regs(struct
         struct radeon_encoder_lvds *lvds = NULL;
         uint32_t fp_vert_stretch, fp_horz_stretch;
         uint32_t ppll_div_sel, ppll_val;
+        uint32_t lvds_ss_gen_cntl = RREG32(RADEON_LVDS_SS_GEN_CNTL);
 
         lvds = kzalloc(sizeof(struct radeon_encoder_lvds), GFP_KERNEL);
 
@@ -808,6 +809,14 @@ static struct radeon_encoder_lvds *radeon_legacy_get_lvds_info_from_regs(struct
         fp_vert_stretch = RREG32(RADEON_FP_VERT_STRETCH);
         fp_horz_stretch = RREG32(RADEON_FP_HORZ_STRETCH);
 
+        /* These should be fail-safe defaults, fingers crossed */
+        lvds->panel_pwr_delay = 200;
+        lvds->panel_vcc_delay = 2000;
+
+        lvds->lvds_gen_cntl = RREG32(RADEON_LVDS_GEN_CNTL);
+        lvds->panel_digon_delay = (lvds_ss_gen_cntl >> RADEON_LVDS_PWRSEQ_DELAY1_SHIFT) & 0xf;
+        lvds->panel_blon_delay = (lvds_ss_gen_cntl >> RADEON_LVDS_PWRSEQ_DELAY2_SHIFT) & 0xf;
+
         if (fp_vert_stretch & RADEON_VERT_STRETCH_ENABLE)
                 lvds->native_mode.panel_yres =
                     ((fp_vert_stretch & RADEON_VERT_PANEL_SIZE) >>