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

[Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx>]

From: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx>
---
 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,
+					      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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