drm/radeon/kms: update new pll algo

- add support for pre-avivo chips
- add support for fixed post/ref dividers
- add support for non-fractional fb dividers

By default avivo chips use the new algo and
pre-avivo chips use the old algo. Use the "new_pll"
module option to toggle between them.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 33aed6c2d41..6f8619cd1a0 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1191,12 +1191,16 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
                 lvds->ss = radeon_atombios_get_ss_info(encoder, lvds_info->info.ucSS_Id);
 
                 if (ASIC_IS_AVIVO(rdev)) {
-                        if (radeon_new_pll)
-                                lvds->pll_algo = PLL_ALGO_AVIVO;
+                        if (radeon_new_pll == 0)
+                                lvds->pll_algo = PLL_ALGO_LEGACY;
+                        else
+                                lvds->pll_algo = PLL_ALGO_NEW;
+                } else {
+                        if (radeon_new_pll == 1)
+                                lvds->pll_algo = PLL_ALGO_NEW;
                         else
                                 lvds->pll_algo = PLL_ALGO_LEGACY;
-                } else
-                        lvds->pll_algo = PLL_ALGO_LEGACY;
+                }
 
                 /* LVDS quirks */
                 radeon_atom_apply_lvds_quirks(dev, lvds);