[Intel-gfx] [PATCH v2 7/8] drm/i915/lvds: Remove magic from PLL programming

[Ville Syrjälä]

On Wed, Apr 26, 2017 at 08:18:06PM +0300, Imre Deak wrote:
> This looks like a left-over from enabling work. The spec defines
> CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED as reserved set, so follow
> this in the programming.
> 
> v2:
> - Follow the spec to set CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED.
>   (Ville)
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Imre Deak <imre.deak at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/dvo_ch7017.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/dvo_ch7017.c b/drivers/gpu/drm/i915/dvo_ch7017.c
> index b3c7c19..80b3e16 100644
> --- a/drivers/gpu/drm/i915/dvo_ch7017.c
> +++ b/drivers/gpu/drm/i915/dvo_ch7017.c
> @@ -280,10 +280,10 @@ static void ch7017_mode_set(struct intel_dvo_device *dvo,
>  			(0 << CH7017_PHASE_DETECTOR_SHIFT);
>  	} else {
>  		outputs_enable = CH7017_LVDS_CHANNEL_A | CH7017_CHARGE_PUMP_HIGH;
> -		lvds_pll_feedback_div = CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
> +		lvds_pll_feedback_div =
> +			CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
>  			(2 << CH7017_LVDS_PLL_FEED_BACK_DIVIDER_SHIFT) |
>  			(3 << CH7017_LVDS_PLL_FEED_FORWARD_DIVIDER_SHIFT);
> -		lvds_pll_feedback_div = 35;
>  		lvds_control_2 = (3 << CH7017_LOOP_FILTER_SHIFT) |
>  			(0 << CH7017_PHASE_DETECTOR_SHIFT);
>  		if (1) { /* XXX: dual channel panel detection.  Assume yes for now. */
> -- 
> 2.5.0

-- 
Ville Syrjälä
Intel OTC