Bspec update tells that we have to enable oscaledcompmethod instead of
ouniqetrangenmethod for enabling scale value during swing programming.
v2: Adding back 'don't care' values to bxt_ddi_translations_dp and add
error message if ouniquetrangemethod was set (Imre)
Signed-off-by: Sonika Jindal <sonika.jindal@xxxxxxxxx>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx>(v1)
---
drivers/gpu/drm/i915/i915_reg.h | 3 ++-
drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++--
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 812b7b2..3f2135d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1395,7 +1395,8 @@ enum skl_disp_power_wells {
#define BXT_PORT_TX_DW3_LN0(port) _PORT3(port, _PORT_TX_DW3_LN0_A, \
_PORT_TX_DW3_LN0_B, \
_PORT_TX_DW3_LN0_C)
-#define UNIQE_TRANGE_EN_METHOD (1 << 27)
+#define SCALE_DCOMP_METHOD (1 << 26)
+#define UNIQUE_TRANGE_EN_METHOD (1 << 27)
#define _PORT_TX_DW4_LN0_A 0x162510
#define _PORT_TX_DW4_LN0_B 0x6C510
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index fec51df..7705bc9 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2151,9 +2151,13 @@ static void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
I915_WRITE(BXT_PORT_TX_DW2_GRP(port), val);
val = I915_READ(BXT_PORT_TX_DW3_LN0(port));
- val &= ~UNIQE_TRANGE_EN_METHOD;
+ val &= ~SCALE_DCOMP_METHOD;
if (ddi_translations[level].enable)
- val |= UNIQE_TRANGE_EN_METHOD;
+ val |= SCALE_DCOMP_METHOD;
+
+ if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
+ DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
+
I915_WRITE(BXT_PORT_TX_DW3_GRP(port), val);
val = I915_READ(BXT_PORT_TX_DW4_LN0(port));
--
1.7.10.4
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