[Intel-gfx] [PATCH 2/2] drm/i915: KBL - Recommended buffer translation programming for DisplayPort
Vivi, Rodrigo
rodrigo.vivi at intel.com
Tue Oct 4 00:30:51 UTC 2016
On Mon, 2016-10-03 at 13:50 +0300, Jani Nikula wrote:
> On Fri, 30 Sep 2016, Rodrigo Vivi <rodrigo.vivi at intel.com> wrote:
> > According to spec: "KBL re-uses SKL values, except where
> > specific KBL values are listed."
> >
> > And recently spec has changed adding different table for Display Port only.
> > But for all SKUs (H,S,U,Y) we have slightly different values.
> >
> > Cc: Manasi Navare <manasi.d.navare at intel.com>
> > Cc: Arthur Runyan <arthur.j.runyan at intel.com>
> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_ddi.c | 88 +++++++++++++++++++++++++++++++++++-----
> > 1 file changed, 78 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > index 018964b..1573360 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -167,8 +167,47 @@ static const struct ddi_buf_trans skl_y_ddi_translations_dp[] = {
> > { 0x80005012, 0x000000C0, 0x3 },
> > };
> >
> > +/* Kabylake H and S */
> > +static const struct ddi_buf_trans kbl_ddi_translations_dp[] = {
> > + { 0x00002016, 0x000000A0, 0x0 },
> > + { 0x00005012, 0x0000009B, 0x0 },
> > + { 0x00007011, 0x00000088, 0x0 },
> > + { 0x80009010, 0x000000C0, 0x1 },
> > + { 0x00002016, 0x0000009B, 0x0 },
> > + { 0x00005012, 0x00000088, 0x0 },
> > + { 0x80007011, 0x000000C0, 0x1 },
> > + { 0x00002016, 0x0000009F, 0x0 },
> > + { 0x80005012, 0x000000C0, 0x1 },
> > +};
> > +
> > +/* Kabylake U */
> > +static const struct ddi_buf_trans kbl_u_ddi_translations_dp[] = {
> > + { 0x0000201B, 0x000000A1, 0x0 },
> > + { 0x00005012, 0x00000088, 0x0 },
> > + { 0x80007011, 0x000000CD, 0x3 },
> > + { 0x80009010, 0x000000C0, 0x3 },
> > + { 0x0000201B, 0x0000009D, 0x0 },
> > + { 0x80005012, 0x000000C0, 0x3 },
> > + { 0x80007011, 0x000000C0, 0x3 },
> > + { 0x00002016, 0x0000004F, 0x0 },
> > + { 0x80005012, 0x000000C0, 0x3 },
> > +};
> > +
> > +/* Kabylake Y */
> > +static const struct ddi_buf_trans kbl_y_ddi_translations_dp[] = {
> > + { 0x00001017, 0x000000A1, 0x0 },
> > + { 0x00005012, 0x00000088, 0x0 },
> > + { 0x80007011, 0x000000CD, 0x3 },
> > + { 0x8000800F, 0x000000C0, 0x3 },
> > + { 0x00001017, 0x0000009D, 0x0 },
> > + { 0x80005012, 0x000000C0, 0x3 },
> > + { 0x80007011, 0x000000C0, 0x3 },
> > + { 0x00001017, 0x0000004C, 0x0 },
> > + { 0x80005012, 0x000000C0, 0x3 },
> > +};
> > +
> > /*
> > - * Skylake H and S
> > + * Skylake/Kabylake H and S
> > * eDP 1.4 low vswing translation parameters
> > */
> > static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
> > @@ -185,7 +224,7 @@ static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
> > };
> >
> > /*
> > - * Skylake U
> > + * Skylake/Kabylake U
> > * eDP 1.4 low vswing translation parameters
> > */
> > static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
> > @@ -202,7 +241,7 @@ static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
> > };
> >
> > /*
> > - * Skylake Y
> > + * Skylake/Kabylake Y
> > * eDP 1.4 low vswing translation parameters
> > */
> > static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
> > @@ -218,7 +257,7 @@ static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
> > { 0x00000018, 0x0000008A, 0x0 },
> > };
> >
> > -/* Skylake U, H and S */
> > +/* Skylake/Kabylake U, H and S */
> > static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
> > { 0x00000018, 0x000000AC, 0x0 },
> > { 0x00005012, 0x0000009D, 0x0 },
> > @@ -233,7 +272,7 @@ static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
> > { 0x80000018, 0x000000C0, 0x1 },
> > };
> >
> > -/* Skylake Y */
> > +/* Skylake/Kabylake Y */
> > static const struct ddi_buf_trans skl_y_ddi_translations_hdmi[] = {
> > { 0x00000018, 0x000000A1, 0x0 },
> > { 0x00005012, 0x000000DF, 0x0 },
> > @@ -334,10 +373,10 @@ bdw_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
> > static const struct ddi_buf_trans *
> > skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
> > {
> > - if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
> > + if (IS_SKL_ULX(dev_priv)) {
> > *n_entries = ARRAY_SIZE(skl_y_ddi_translations_dp);
> > return skl_y_ddi_translations_dp;
> > - } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv)) {
> > + } else if (IS_SKL_ULT(dev_priv)) {
> > *n_entries = ARRAY_SIZE(skl_u_ddi_translations_dp);
> > return skl_u_ddi_translations_dp;
> > } else {
> > @@ -347,6 +386,21 @@ skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
> > }
> >
> > static const struct ddi_buf_trans *
> > +kbl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
> > +{
> > + if (IS_KBL_ULX(dev_priv)) {
> > + *n_entries = ARRAY_SIZE(kbl_y_ddi_translations_dp);
> > + return kbl_y_ddi_translations_dp;
> > + } else if (IS_KBL_ULT(dev_priv)) {
> > + *n_entries = ARRAY_SIZE(kbl_u_ddi_translations_dp);
> > + return kbl_u_ddi_translations_dp;
> > + } else {
> > + *n_entries = ARRAY_SIZE(kbl_ddi_translations_dp);
> > + return kbl_ddi_translations_dp;
> > + }
> > +}
> > +
> > +static const struct ddi_buf_trans *
> > skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
> > {
> > if (dev_priv->vbt.edp.low_vswing) {
> > @@ -362,7 +416,10 @@ skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
> > }
> > }
> >
> > - return skl_get_buf_trans_dp(dev_priv, n_entries);
> > + if (dev_priv->vbt.edp.low_vswing)
> > + return kbl_get_buf_trans_dp(dev_priv, n_entries);
> > + else
> > + return skl_get_buf_trans_dp(dev_priv, n_entries);
>
> This seems really confusing.
I agree, but I would like to avoid duplicating the identical tables...
those by spec are explicitly same table...
another option without duplicating the tables is duplicating the
function like below... what I believe it is still confusing with all
those skl and kbl inside this function...
what do you prefer?
static const struct ddi_buf_trans
*
kbl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int
*n_entries)
{
if (dev_priv->vbt.edp.low_vswing)
{
if (IS_KBL_ULX(dev_priv))
{
*n_entries =
ARRAY_SIZE(skl_y_ddi_translations_edp);
return
skl_y_ddi_translations_edp;
} else if (IS_KBL_ULT(dev_priv))
{
*n_entries =
ARRAY_SIZE(skl_u_ddi_translations_edp);
return
skl_u_ddi_translations_edp;
} else
{
*n_entries =
ARRAY_SIZE(skl_ddi_translations_edp);
return
skl_ddi_translations_edp;
}
}
return kbl_get_buf_trans_dp(dev_priv,
n_entries);
}
>
> BR,
> Jani.
>
>
> > }
> >
> > static const struct ddi_buf_trans *
> > @@ -430,7 +487,13 @@ void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
> > if (IS_BROXTON(dev_priv))
> > return;
> >
> > - if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
> > + if (IS_KABYLAKE(dev_priv)) {
> > + ddi_translations_fdi = NULL;
> > + ddi_translations_dp =
> > + kbl_get_buf_trans_dp(dev_priv, &n_dp_entries);
> > + ddi_translations_edp =
> > + skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
> > + } else if (IS_SKYLAKE(dev_priv)) {
> > ddi_translations_fdi = NULL;
> > ddi_translations_dp =
> > skl_get_buf_trans_dp(dev_priv, &n_dp_entries);
> > @@ -1437,7 +1500,12 @@ static void skl_ddi_set_iboost(struct intel_encoder *encoder, u32 level)
> > if (dp_iboost) {
> > iboost = dp_iboost;
> > } else {
> > - ddi_translations = skl_get_buf_trans_dp(dev_priv, &n_entries);
> > + if (IS_KABYLAKE(dev_priv))
> > + ddi_translations = kbl_get_buf_trans_dp(dev_priv,
> > + &n_entries);
> > + else
> > + ddi_translations = skl_get_buf_trans_dp(dev_priv,
> > + &n_entries);
> > iboost = ddi_translations[level].i_boost;
> > }
> > } else if (type == INTEL_OUTPUT_EDP) {
>
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