System specific spread spectrum overrides can be specified in
the integrated system info table for Fusion APUs. This adds
support for using those overrides.
Signed-off-by: Alex Deucher <alexdeuc...@gmail.com>
---
drivers/gpu/drm/radeon/radeon_atombios.c | 39 ++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c
b/drivers/gpu/drm/radeon/radeon_atombios.c
index 87ead09..4d37b2d 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1321,6 +1321,43 @@ bool radeon_atombios_get_ppll_ss_info(struct
radeon_device *rdev,
return false;
}
+static void radeon_atombios_get_igp_ss_overrides(struct radeon_device *rdev,
+ struct radeon_atom_ss *ss,
+ int id)
+{
+ 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;
+ 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 *)
+ (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);
+ break;
+ case ASIC_INTERNAL_SS_ON_HDMI:
+ percentage = le16_to_cpu(igp_info->usHDMISSPercentage);
+ rate = le16_to_cpu(igp_info->usHDMISSpreadRateIn10Hz);
+ break;
+ case ASIC_INTERNAL_SS_ON_LVDS:
+ percentage = le16_to_cpu(igp_info->usLvdsSSPercentage);
+ rate = le16_to_cpu(igp_info->usLvdsSSpreadRateIn10Hz);
+ break;
+ }
+ if (percentage)
+ ss->percentage = percentage;
+ if (rate)
+ ss->rate = rate;
+ }
+}
+
union asic_ss_info {
struct _ATOM_ASIC_INTERNAL_SS_INFO info;
struct _ATOM_ASIC_INTERNAL_SS_INFO_V2 info_2;
@@ -1385,6 +1422,8 @@ bool radeon_atombios_get_asic_ss_info(struct
radeon_device *rdev,
le16_to_cpu(ss_info->info_3.asSpreadSpectrum[i].usSpreadSpectrumPercentage);
ss->type =
ss_info->info_3.asSpreadSpectrum[i].ucSpreadSpectrumMode;
ss->rate =
le16_to_cpu(ss_info->info_3.asSpreadSpectrum[i].usSpreadRateIn10Hz);
+ if (rdev->flags & RADEON_IS_IGP)
+
radeon_atombios_get_igp_ss_overrides(rdev, ss, id);
return true;
}
}
--
1.7.1.1
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