[Intel-gfx] [RFC 3/3] drm/i915/icl: Calculate DPLL params for DSI

[Ville Syrjälä]

On Fri, Sep 14, 2018 at 12:24:14PM +0530, Vandita Kulkarni wrote:
> From: Madhav Chauhan <madhav.chauhan at intel.com>
> 
> This patch calculate various DPLL dividers and
> parameters for DSI encoder and adjust AFE clock
> for DSI. For DSI, 8x clock is AFE clock.
> 
> v2: Extend haswell_crtc_compute_clock() for Gen11 DSI
> v3: Rebase
> 
> Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
> Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c  | 4 +++-
>  drivers/gpu/drm/i915/intel_dpll_mgr.c | 7 ++++++-
>  2 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 6928dcc..1a44c5e 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9238,10 +9238,12 @@ void hsw_disable_pc8(struct drm_i915_private *dev_priv)
>  static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
>  				      struct intel_crtc_state *crtc_state)
>  {
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>  	struct intel_atomic_state *state =
>  		to_intel_atomic_state(crtc_state->base.state);
>  
> -	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI)) {
> +	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
> +				 IS_ICELAKE(dev_priv)) {
>  		struct intel_encoder *encoder =
>  			intel_get_crtc_new_encoder(state, crtc_state);
>  
> diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
> index 36ed155..5175e44 100644
> --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
> +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
> @@ -22,6 +22,7 @@
>   */
>  
>  #include "intel_drv.h"
> +#include "intel_dsi.h"
>  
>  /**
>   * DOC: Display PLLs
> @@ -2532,7 +2533,11 @@ static bool icl_calc_dpll_state(struct intel_crtc_state *crtc_state,
>  		ret = icl_calc_tbt_pll(dev_priv, clock, &pll_params);
>  	else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
>  		ret = cnl_ddi_calculate_wrpll(clock, dev_priv, &pll_params);
> -	else
> +	else if (encoder->type == INTEL_OUTPUT_DSI) {
> +		struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
> +		ret = cnl_ddi_calculate_wrpll(intel_dsi->bitrate_khz/5,

Missing port_clock=whatever in compute config?

> +					      dev_priv, &pll_params);
> +	} else
>  		ret = icl_calc_dp_combo_pll(dev_priv, clock, &pll_params);
>  
>  	if (!ret)
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel