drm/radeon: properly handle SS overrides on TN (v2)

The IntegratedSystemInfo table changed versions
on TN.  Update the SS override lookup to handle it.

v2: fix copy-paste typo.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index b1e3820..f9c21f9 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1263,6 +1263,8 @@ bool radeon_atom_get_clock_info(struct drm_device *dev)
 union igp_info {
        struct _ATOM_INTEGRATED_SYSTEM_INFO info;
        struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_2;
+       struct _ATOM_INTEGRATED_SYSTEM_INFO_V6 info_6;
+       struct _ATOM_INTEGRATED_SYSTEM_INFO_V1_7 info_7;
 };
 
 bool radeon_atombios_sideport_present(struct radeon_device *rdev)
@@ -1390,27 +1392,50 @@ static void radeon_atombios_get_igp_ss_overrides(struct radeon_device *rdev,
        struct radeon_mode_info *mode_info = &rdev->mode_info;
        int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo);
        u16 data_offset, size;
-       struct _ATOM_INTEGRATED_SYSTEM_INFO_V6 *igp_info;
+       union igp_info *igp_info;
        u8 frev, crev;
        u16 percentage = 0, rate = 0;
 
        /* get any igp specific overrides */
        if (atom_parse_data_header(mode_info->atom_context, index, &size,
                                   &frev, &crev, &data_offset)) {
-               igp_info = (struct _ATOM_INTEGRATED_SYSTEM_INFO_V6 *)
+               igp_info = (union igp_info *)
                        (mode_info->atom_context->bios + data_offset);
-               switch (id) {
-               case ASIC_INTERNAL_SS_ON_TMDS:
-                       percentage = le16_to_cpu(igp_info->usDVISSPercentage);
-                       rate = le16_to_cpu(igp_info->usDVISSpreadRateIn10Hz);
+               switch (crev) {
+               case 6:
+                       switch (id) {
+                       case ASIC_INTERNAL_SS_ON_TMDS:
+                               percentage = le16_to_cpu(igp_info->info_6.usDVISSPercentage);
+                               rate = le16_to_cpu(igp_info->info_6.usDVISSpreadRateIn10Hz);
+                               break;
+                       case ASIC_INTERNAL_SS_ON_HDMI:
+                               percentage = le16_to_cpu(igp_info->info_6.usHDMISSPercentage);
+                               rate = le16_to_cpu(igp_info->info_6.usHDMISSpreadRateIn10Hz);
+                               break;
+                       case ASIC_INTERNAL_SS_ON_LVDS:
+                               percentage = le16_to_cpu(igp_info->info_6.usLvdsSSPercentage);
+                               rate = le16_to_cpu(igp_info->info_6.usLvdsSSpreadRateIn10Hz);
+                               break;
+                       }
                        break;
-               case ASIC_INTERNAL_SS_ON_HDMI:
-                       percentage = le16_to_cpu(igp_info->usHDMISSPercentage);
-                       rate = le16_to_cpu(igp_info->usHDMISSpreadRateIn10Hz);
+               case 7:
+                       switch (id) {
+                       case ASIC_INTERNAL_SS_ON_TMDS:
+                               percentage = le16_to_cpu(igp_info->info_7.usDVISSPercentage);
+                               rate = le16_to_cpu(igp_info->info_7.usDVISSpreadRateIn10Hz);
+                               break;
+                       case ASIC_INTERNAL_SS_ON_HDMI:
+                               percentage = le16_to_cpu(igp_info->info_7.usHDMISSPercentage);
+                               rate = le16_to_cpu(igp_info->info_7.usHDMISSpreadRateIn10Hz);
+                               break;
+                       case ASIC_INTERNAL_SS_ON_LVDS:
+                               percentage = le16_to_cpu(igp_info->info_7.usLvdsSSPercentage);
+                               rate = le16_to_cpu(igp_info->info_7.usLvdsSSpreadRateIn10Hz);
+                               break;
+                       }
                        break;
-               case ASIC_INTERNAL_SS_ON_LVDS:
-                       percentage = le16_to_cpu(igp_info->usLvdsSSPercentage);
-                       rate = le16_to_cpu(igp_info->usLvdsSSpreadRateIn10Hz);
+               default:
+                       DRM_ERROR("Unsupported IGP table: %d %d\n", frev, crev);
                        break;
                }
                if (percentage)