From: Damien Lespiau <damien.lespiau at intel.com>
SBI_GEN0 is used instead of SBI_DBUFF0 on ULT platforms.
Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_display.c | 12 +++++++++---
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index acf768d..90c4f43 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4563,6 +4563,8 @@
#define SBI_SSCAUXDIV_FINALDIV2SEL(x) ((x)<<4)
#define SBI_DBUFF0 0x2a00
#define SBI_DBUFF0_ENABLE (1<<0)
+#define SBI_GEN0 0x1f00
+#define SBI_GEN0_ENABLE (1<<0)
/* LPT PIXCLK_GATE */
#define PIXCLK_GATE 0xC6020
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0eba466..6472065 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5132,9 +5132,15 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
}
- tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);
- tmp |= SBI_DBUFF0_ENABLE;
- intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK);
+ if (IS_ULT(dev)) {
+ tmp = intel_sbi_read(dev_priv, SBI_GEN0, SBI_ICLK);
+ tmp |= SBI_GEN0_ENABLE;
+ intel_sbi_write(dev_priv, SBI_GEN0, tmp, SBI_ICLK);
+ } else {
+ tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);
+ tmp |= SBI_DBUFF0_ENABLE;
+ intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK);
+ }
}
/*
--
1.7.7.5
