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drm/i915: Extract ilk_fb_cb_factor()

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Pull the code to calculate PCH DPLL tuning factor
into its own function. Helps declutter ilk_update_pll_dividers().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412182703.19916-6-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2024-04-12 21:26:50 +03:00
parent 4d6e86fbec
commit 3705cb818b
1 changed files with 17 additions and 15 deletions
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32
drivers/gpu/drm/i915/display/intel_dpll.c
View File

@ -1192,6 +1192,22 @@ static int mtl_crtc_compute_clock(struct intel_atomic_state *state,
return 0;
}
static int ilk_fb_cb_factor(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *i915 = to_i915(crtc->base.dev);
if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
((intel_panel_use_ssc(i915) && i915->display.vbt.lvds_ssc_freq == 100000) ||
(HAS_PCH_IBX(i915) && intel_is_dual_link_lvds(i915))))
return 25;
if (crtc_state->sdvo_tv_clock)
return 20;
return 21;
}
static bool ilk_needs_fb_cb_tune(const struct dpll *dpll, int factor)
{
return dpll->m < factor * dpll->n;
@ -1201,22 +1217,8 @@ static void ilk_update_pll_dividers(struct intel_crtc_state *crtc_state,
const struct dpll *clock,
const struct dpll *reduced_clock)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
int factor = ilk_fb_cb_factor(crtc_state);
u32 fp, fp2;
int factor;
/* Enable autotuning of the PLL clock (if permissible) */
factor = 21;
if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
if ((intel_panel_use_ssc(dev_priv) &&
dev_priv->display.vbt.lvds_ssc_freq == 100000) ||
(HAS_PCH_IBX(dev_priv) &&
intel_is_dual_link_lvds(dev_priv)))
factor = 25;
} else if (crtc_state->sdvo_tv_clock) {
factor = 20;
}
fp = i9xx_dpll_compute_fp(clock);
if (ilk_needs_fb_cb_tune(clock, factor))