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drm/i915: Add crtc .crtc_get_shared_dpll()

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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>
This commit is contained in:
Ville Syrjälä 2022-03-25 14:32:01 +02:00
parent 3bb9e25767
commit a8e85faaa5
3 changed files with 52 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/gpu/drm/i915/display/intel_display.c
View file

@ -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;
}
/*

47
drivers/gpu/drm/i915/display/intel_dpll.c
View file

@ -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)
{

2
drivers/gpu/drm/i915/display/intel_dpll.h
View file

@ -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);