[PATCH 2/3] drm/i915/icl: Calculate DPLL params for DSI

[Vandita Kulkarni <vandita.kulkarni@intel.com>]

From: Madhav Chauhan <madhav.chauhan@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

v4: use port clock instead of bitrate.

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c  | 4 +++-
 drivers/gpu/drm/i915/intel_dpll_mgr.c | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fc7e3b0..ddbba92 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9250,10 +9250,12 @@ 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 7bdff5b..f31acf1 100644
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -2525,6 +2525,8 @@ 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 if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
+		ret = cnl_ddi_calculate_wrpll(clock/5, dev_priv, &pll_params);
 	else
 		ret = icl_calc_dp_combo_pll(dev_priv, clock, &pll_params);
 
-- 
1.9.1

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