On to, 2015-09-24 at 10:22 +0530, Sonika Jindal wrote:
> 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)
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> ---
> 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));
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