[Intel-gfx] [PATCH 17/17] drm/i915/icl: Fix the DP Max Voltage for ICL

[Rodrigo Vivi]

On Thu, Feb 22, 2018 at 12:55:19AM -0300, Paulo Zanoni wrote:
> From: Manasi Navare <manasi.d.navare at intel.com>
> 
> On clock recovery this function is called to find out
> the max voltage swing level that we could go.
> 
> However gen 9 functions use the old buffer translation tables
> to figure that out. ICL uses different set of tables for eDP
> and DP for both Combo and MG PHY ports. This patch adds the hook
> for ICL for getting this information from appropriate buf trans tables.
> 
> v5 (from Paulo):
> * New rebase after changes to earlier patches.
> v4:
> * Rebase.
> v3:
> * Follow the coding conventions here
> (https://cgit.freedesktop.org/drm-intel/tree/Documentation/process/codin
> g-style.rst#n191) (Paulo)
> v2:
> * Rebase after patch that adds voltage check inside buf trans
> function (Rodrigo)
> 
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

seems a lot change since my first review, but everything looks
correct to me still on this newer version. So

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

> Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index ad82ef91263e..fbdd2340c8aa 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -2085,7 +2085,13 @@ u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder)
>  	enum port port = encoder->port;
>  	int n_entries;
>  
> -	if (IS_CANNONLAKE(dev_priv)) {
> +	if (IS_ICELAKE(dev_priv)) {
> +		if (port == PORT_A || port == PORT_B)
> +			icl_get_combo_buf_trans(dev_priv, port, encoder->type,
> +						&n_entries);
> +		else
> +			n_entries = ARRAY_SIZE(icl_mg_phy_ddi_translations);
> +	} else if (IS_CANNONLAKE(dev_priv)) {
>  		if (encoder->type == INTEL_OUTPUT_EDP)
>  			cnl_get_buf_trans_edp(dev_priv, &n_entries);
>  		else
> -- 
> 2.14.3
> 
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