drm/radeon/kms: make sure ss id matches

entries in the ss table aren't always ordered
by id.

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

1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index d7b0feb7d47f..6cac0651d0f1 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1006,6 +1006,7 @@ static struct radeon_atom_ss *radeon_atombios_get_ss_info(struct
         struct _ATOM_SPREAD_SPECTRUM_INFO *ss_info;
         uint8_t frev, crev;
         struct radeon_atom_ss *ss = NULL;
+        int i;
 
         if (id > ATOM_MAX_SS_ENTRY)
                 return NULL;
@@ -1023,12 +1024,17 @@ static struct radeon_atom_ss *radeon_atombios_get_ss_info(struct
                 if (!ss)
                         return NULL;
 
-                ss->percentage = le16_to_cpu(ss_info->asSS_Info[id].usSpreadSpectrumPercentage);
-                ss->type = ss_info->asSS_Info[id].ucSpreadSpectrumType;
-                ss->step = ss_info->asSS_Info[id].ucSS_Step;
-                ss->delay = ss_info->asSS_Info[id].ucSS_Delay;
-                ss->range = ss_info->asSS_Info[id].ucSS_Range;
-                ss->refdiv = ss_info->asSS_Info[id].ucRecommendedRef_Div;
+                for (i = 0; i < ATOM_MAX_SS_ENTRY; i++) {
+                        if (ss_info->asSS_Info[i].ucSS_Id == id) {
+                                ss->percentage =
+                                        le16_to_cpu(ss_info->asSS_Info[i].usSpreadSpectrumPercentage);
+                                ss->type = ss_info->asSS_Info[i].ucSpreadSpectrumType;
+                                ss->step = ss_info->asSS_Info[i].ucSS_Step;
+                                ss->delay = ss_info->asSS_Info[i].ucSS_Delay;
+                                ss->range = ss_info->asSS_Info[i].ucSS_Range;
+                                ss->refdiv = ss_info->asSS_Info[i].ucRecommendedRef_Div;
+                        }
+                }
         }
         return ss;
 }