[Intel-gfx] [PATCH v4 19/23] drm/i915/adl_p: Define and use ADL-P specific DP translation tables

[Clint Taylor]

Values match current BSPEC.

Reviewed-by: Clint Taylor <Clinton.A.Taylor at intel.com>

-Clint


On 5/14/21 8:10 PM, Matt Roper wrote:
> From: Mika Kahola <mika.kahola at intel.com>
>
> Define and use DP voltage swing and pre-emphasis translation tables
> for ADL-P.
>
> v2:
>   - Update according to recent bspec updates; there are now separate
>     tables for RBR/HBR and HBR2/HBR3.  (Anusha)
>
> BSpec: 54956
> Cc: Imre Deak <imre.deak at intel.com>
> Signed-off-by: Mika Kahola <mika.kahola at intel.com>
> Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_ddi.c      |  7 ++-
>   .../drm/i915/display/intel_ddi_buf_trans.c    | 53 +++++++++++++++++++
>   .../drm/i915/display/intel_ddi_buf_trans.h    |  4 ++
>   3 files changed, 63 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 38a4f251b9c9..e0adb14ecd0d 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -985,6 +985,8 @@ static u8 intel_ddi_dp_voltage_max(struct intel_dp *intel_dp,
>   	if (DISPLAY_VER(dev_priv) >= 12) {
>   		if (intel_phy_is_combo(dev_priv, phy))
>   			tgl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
> +		else if (IS_ALDERLAKE_P(dev_priv))
> +			adlp_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
>   		else
>   			tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
>   	} else if (DISPLAY_VER(dev_priv) == 11) {
> @@ -1431,7 +1433,10 @@ tgl_dkl_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
>   	if (enc_to_dig_port(encoder)->tc_mode == TC_PORT_TBT_ALT)
>   		return;
>   
> -	ddi_translations = tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
> +	if (IS_ALDERLAKE_P(dev_priv))
> +		ddi_translations = adlp_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
> +	else
> +		ddi_translations = tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
>   
>   	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
>   		return;
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
> index 7bcdd5c12028..b6388d93c3ea 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
> @@ -735,6 +735,34 @@ static const struct cnl_ddi_buf_trans rkl_combo_phy_ddi_translations_dp_hbr2_hbr
>   	{ 0x6, 0x7F, 0x3F, 0x00, 0x00 },	/* 900   900      0.0   */
>   };
>   
> +static const struct tgl_dkl_phy_ddi_buf_trans adlp_dkl_phy_dp_ddi_trans_hbr[] = {
> +				/* VS	pre-emp	Non-trans mV	Pre-emph dB */
> +	{ 0x7, 0x0, 0x01 },	/* 0	0	400mV		0 dB */
> +	{ 0x5, 0x0, 0x06 },	/* 0	1	400mV		3.5 dB */
> +	{ 0x2, 0x0, 0x0B },	/* 0	2	400mV		6 dB */
> +	{ 0x0, 0x0, 0x17 },	/* 0	3	400mV		9.5 dB */
> +	{ 0x5, 0x0, 0x00 },	/* 1	0	600mV		0 dB */
> +	{ 0x2, 0x0, 0x08 },	/* 1	1	600mV		3.5 dB */
> +	{ 0x0, 0x0, 0x14 },	/* 1	2	600mV		6 dB */
> +	{ 0x2, 0x0, 0x00 },	/* 2	0	800mV		0 dB */
> +	{ 0x0, 0x0, 0x0B },	/* 2	1	800mV		3.5 dB */
> +	{ 0x0, 0x0, 0x00 },	/* 3	0	1200mV		0 dB */
> +};
> +
> +static const struct tgl_dkl_phy_ddi_buf_trans adlp_dkl_phy_dp_ddi_trans_hbr2_hbr3[] = {
> +				/* VS	pre-emp	Non-trans mV	Pre-emph dB */
> +	{ 0x7, 0x0, 0x00 },	/* 0	0	400mV		0 dB */
> +	{ 0x5, 0x0, 0x04 },	/* 0	1	400mV		3.5 dB */
> +	{ 0x2, 0x0, 0x0A },	/* 0	2	400mV		6 dB */
> +	{ 0x0, 0x0, 0x18 },	/* 0	3	400mV		9.5 dB */
> +	{ 0x5, 0x0, 0x00 },	/* 1	0	600mV		0 dB */
> +	{ 0x2, 0x0, 0x06 },	/* 1	1	600mV		3.5 dB */
> +	{ 0x0, 0x0, 0x14 },	/* 1	2	600mV		6 dB */
> +	{ 0x2, 0x0, 0x00 },	/* 2	0	800mV		0 dB */
> +	{ 0x0, 0x0, 0x09 },	/* 2	1	800mV		3.5 dB */
> +	{ 0x0, 0x0, 0x00 },	/* 3	0	1200mV		0 dB */
> +};
> +
>   bool is_hobl_buf_trans(const struct cnl_ddi_buf_trans *table)
>   {
>   	return table == tgl_combo_phy_ddi_translations_edp_hbr2_hobl;
> @@ -1348,6 +1376,31 @@ tgl_get_dkl_buf_trans(struct intel_encoder *encoder,
>   		return tgl_get_dkl_buf_trans_dp(encoder, crtc_state, n_entries);
>   }
>   
> +static const struct tgl_dkl_phy_ddi_buf_trans *
> +adlp_get_dkl_buf_trans_dp(struct intel_encoder *encoder,
> +			  const struct intel_crtc_state *crtc_state,
> +			  int *n_entries)
> +{
> +	if (crtc_state->port_clock > 270000) {
> +		*n_entries = ARRAY_SIZE(adlp_dkl_phy_dp_ddi_trans_hbr2_hbr3);
> +		return adlp_dkl_phy_dp_ddi_trans_hbr;
> +	} else {
> +		*n_entries = ARRAY_SIZE(adlp_dkl_phy_dp_ddi_trans_hbr);
> +		return adlp_dkl_phy_dp_ddi_trans_hbr;
> +	}
> +}
> +
> +const struct tgl_dkl_phy_ddi_buf_trans *
> +adlp_get_dkl_buf_trans(struct intel_encoder *encoder,
> +		      const struct intel_crtc_state *crtc_state,
> +		      int *n_entries)
> +{
> +	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
> +		return tgl_get_dkl_buf_trans_hdmi(encoder, crtc_state, n_entries);
> +	else
> +		return adlp_get_dkl_buf_trans_dp(encoder, crtc_state, n_entries);
> +}
> +
>   int intel_ddi_hdmi_num_entries(struct intel_encoder *encoder,
>   			       const struct intel_crtc_state *crtc_state,
>   			       int *default_entry)
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
> index f8f0ef87e977..4c2efab38642 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
> +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
> @@ -67,6 +67,10 @@ bxt_get_buf_trans(struct intel_encoder *encoder,
>   		  const struct intel_crtc_state *crtc_state,
>   		  int *n_entries);
>   
> +const struct tgl_dkl_phy_ddi_buf_trans *
> +adlp_get_dkl_buf_trans(struct intel_encoder *encoder,
> +		       const struct intel_crtc_state *crtc_state,
> +		       int *n_entries);
>   const struct cnl_ddi_buf_trans *
>   tgl_get_combo_buf_trans(struct intel_encoder *encoder,
>   			const struct intel_crtc_state *crtc_state,