[Intel-gfx] [PATCH] drm/i915: KBL - Recommended buffer translation programming for DisplayPort
Manasi Navare
manasi.d.navare at intel.com
Tue Oct 18 21:42:14 UTC 2016
On Tue, Oct 18, 2016 at 08:57:36AM -0700, Rodrigo Vivi 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.
>
> v2: Fix wrong condition spotted by Jani.
> v3: Fix 7th entry of KBL H and S table - by Manasi.
>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare 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 0def25d..6f793e5 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -167,8 +167,47 @@ struct ddi_buf_trans {
> { 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, 0x00000097, 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 @@ struct ddi_buf_trans {
> };
>
> /*
> - * 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 @@ struct ddi_buf_trans {
> };
>
> /*
> - * 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 @@ struct ddi_buf_trans {
> { 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 @@ struct ddi_buf_trans {
> { 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 @@ enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
> 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 @@ enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
> }
>
> 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 @@ enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
> }
> }
>
> - return skl_get_buf_trans_dp(dev_priv, n_entries);
> + if (IS_KABYLAKE(dev_priv))
> + return kbl_get_buf_trans_dp(dev_priv, n_entries);
> + else
> + return skl_get_buf_trans_dp(dev_priv, n_entries);
> }
>
> 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) {
> --
> 1.9.1
>
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