From 8c8abcb90927dd7f2caed5b364a6b705a5509aea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Fri, 25 Mar 2022 14:32:01 +0200
Subject: drm/i915: Add crtc .crtc_get_shared_dpll()
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Git-commit: a8e85faaa51fc9cada6ea272cbf60d6ad880eddf
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Start splitting the .compute_crtc_clock() into two parts; one
part does the computation, the second part does the shared dpll
assignment. I want to move the actual computation part much earlier
into the compute_config() phase.
v2: dg2_crtc_get_shared_dpll() not needed (Jani)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220325123205.22140-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_display.c | 4 ++
drivers/gpu/drm/i915/display/intel_dpll.c | 47 +++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_dpll.h | 2 +
3 files changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index ef6ffe6a1a3e..0decf3d24237 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -4908,6 +4908,10 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
ret = intel_dpll_crtc_compute_clock(state, crtc);
if (ret)
return ret;
+
+ ret = intel_dpll_crtc_get_shared_dpll(state, crtc);
+ if (ret)
+ return ret;
}
/*
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c b/drivers/gpu/drm/i915/display/intel_dpll.c
index bc59efe18e89..6eef0b8a91eb 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll.c
@@ -20,6 +20,8 @@
struct intel_dpll_funcs {
int (*crtc_compute_clock)(struct intel_atomic_state *state,
struct intel_crtc *crtc);
+ int (*crtc_get_shared_dpll)(struct intel_atomic_state *state,
+ struct intel_crtc *crtc);
};
struct intel_limit {
@@ -930,6 +932,12 @@ static void i8xx_compute_dpll(struct intel_crtc_state *crtc_state,
static int hsw_crtc_compute_clock(struct intel_atomic_state *state,
struct intel_crtc *crtc)
+{
+ return 0;
+}
+
+static int hsw_crtc_get_shared_dpll(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(state->base.dev);
struct intel_crtc_state *crtc_state =
@@ -1087,7 +1095,6 @@ static int ilk_crtc_compute_clock(struct intel_atomic_state *state,
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_limit *limit;
int refclk = 120000;
- int ret;
/* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
if (!crtc_state->has_pch_encoder)
@@ -1127,6 +1134,21 @@ static int ilk_crtc_compute_clock(struct intel_atomic_state *state,
ilk_compute_dpll(crtc_state, &crtc_state->dpll,
&crtc_state->dpll);
+ return 0;
+}
+
+static int ilk_crtc_get_shared_dpll(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+ struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+ int ret;
+
+ /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
+ if (!crtc_state->has_pch_encoder)
+ return 0;
+
ret = intel_reserve_shared_dplls(state, crtc, NULL);
if (ret) {
drm_dbg_kms(&dev_priv->drm,
@@ -1376,10 +1398,12 @@ static const struct intel_dpll_funcs dg2_dpll_funcs = {
static const struct intel_dpll_funcs hsw_dpll_funcs = {
.crtc_compute_clock = hsw_crtc_compute_clock,
+ .crtc_get_shared_dpll = hsw_crtc_get_shared_dpll,
};
static const struct intel_dpll_funcs ilk_dpll_funcs = {
.crtc_compute_clock = ilk_crtc_compute_clock,
+ .crtc_get_shared_dpll = ilk_crtc_get_shared_dpll,
};
static const struct intel_dpll_funcs chv_dpll_funcs = {
@@ -1427,6 +1451,27 @@ int intel_dpll_crtc_compute_clock(struct intel_atomic_state *state,
return i915->dpll_funcs->crtc_compute_clock(state, crtc);
}
+int intel_dpll_crtc_get_shared_dpll(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+
+ drm_WARN_ON(&i915->drm, !intel_crtc_needs_modeset(crtc_state));
+
+ if (drm_WARN_ON(&i915->drm, crtc_state->shared_dpll))
+ return 0;
+
+ if (!crtc_state->hw.enable)
+ return 0;
+
+ if (!i915->dpll_funcs->crtc_get_shared_dpll)
+ return 0;
+
+ return i915->dpll_funcs->crtc_get_shared_dpll(state, crtc);
+}
+
void
intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
{
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.h b/drivers/gpu/drm/i915/display/intel_dpll.h
index e9731b2dd01c..bbc30542f29f 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll.h
+++ b/drivers/gpu/drm/i915/display/intel_dpll.h
@@ -18,6 +18,8 @@ enum pipe;
void intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv);
int intel_dpll_crtc_compute_clock(struct intel_atomic_state *state,
struct intel_crtc *crtc);
+int intel_dpll_crtc_get_shared_dpll(struct intel_atomic_state *state,
+ struct intel_crtc *crtc);
int vlv_calc_dpll_params(int refclk, struct dpll *clock);
int pnv_calc_dpll_params(int refclk, struct dpll *clock);
int i9xx_calc_dpll_params(int refclk, struct dpll *clock);
--
2.38.1