From 2dd66ebde4431c93bfa211bc967a6f2089283aa6 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Mon, 14 Mar 2016 09:27:52 +0100 Subject: [PATCH] drm/i915: Use a crtc mask instead of a refcount for dpll functions, v2. This makes it easier to verify correct dpll setup with only a single crtc. It is also useful to detect double dpll enable/disable. Changes since v1: - Rebase on top of Ander's dpll rework. - Change debugfs active to a mask. - Change enabled_crtcs and active_crtcs to unsigned. Signed-off-by: Maarten Lankhorst Link: http://patchwork.freedesktop.org/patch/msgid/1457944075-14123-2-git-send-email-maarten.lankhorst@linux.intel.com Reviewed-by: Ander Conselvan de Oliveira --- drivers/gpu/drm/i915/i915_debugfs.c | 4 +-- drivers/gpu/drm/i915/intel_display.c | 43 +++++++++++++-------------- drivers/gpu/drm/i915/intel_dpll_mgr.c | 35 ++++++++++++---------- drivers/gpu/drm/i915/intel_dpll_mgr.h | 2 +- 4 files changed, 43 insertions(+), 41 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 1d8c3ef29318..ccdca2c7d799 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -3212,8 +3212,8 @@ static int i915_shared_dplls_info(struct seq_file *m, void *unused) struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i]; seq_printf(m, "DPLL%i: %s, id: %i\n", i, pll->name, pll->id); - seq_printf(m, " crtc_mask: 0x%08x, active: %d, on: %s\n", - pll->config.crtc_mask, pll->active, yesno(pll->on)); + seq_printf(m, " crtc_mask: 0x%08x, active: 0x%x, on: %s\n", + pll->config.crtc_mask, pll->active_mask, yesno(pll->on)); seq_printf(m, " tracked hardware state:\n"); seq_printf(m, " dpll: 0x%08x\n", pll->config.hw_state.dpll); seq_printf(m, " dpll_md: 0x%08x\n", diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f3bcafa22e84..089d65eaef75 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12962,7 +12962,7 @@ check_shared_dpll_state(struct drm_device *dev) for (i = 0; i < dev_priv->num_shared_dpll; i++) { struct intel_shared_dpll *pll = intel_get_shared_dpll_by_id(dev_priv, i); - int enabled_crtcs = 0, active_crtcs = 0; + unsigned enabled_crtcs = 0, active_crtcs = 0; bool active; memset(&dpll_hw_state, 0, sizeof(dpll_hw_state)); @@ -12971,15 +12971,15 @@ check_shared_dpll_state(struct drm_device *dev) active = pll->funcs.get_hw_state(dev_priv, pll, &dpll_hw_state); - I915_STATE_WARN(pll->active > hweight32(pll->config.crtc_mask), - "more active pll users than references: %i vs %i\n", - pll->active, hweight32(pll->config.crtc_mask)); - I915_STATE_WARN(pll->active && !pll->on, - "pll in active use but not on in sw tracking\n"); + I915_STATE_WARN(pll->active_mask & ~pll->config.crtc_mask, + "more active pll users than references: %x vs %x\n", + pll->active_mask, pll->config.crtc_mask); if (!(pll->flags & INTEL_DPLL_ALWAYS_ON)) { - I915_STATE_WARN(pll->on && !pll->active, - "pll in on but not on in use in sw tracking\n"); + I915_STATE_WARN(!pll->on && pll->active_mask, + "pll in active use but not on in sw tracking\n"); + I915_STATE_WARN(pll->on && !pll->active_mask, + "pll is on but not used by any active crtc\n"); I915_STATE_WARN(pll->on != active, "pll on state mismatch (expected %i, found %i)\n", pll->on, active); @@ -12987,16 +12987,17 @@ check_shared_dpll_state(struct drm_device *dev) for_each_intel_crtc(dev, crtc) { if (crtc->base.state->enable && crtc->config->shared_dpll == pll) - enabled_crtcs++; - if (crtc->active && crtc->config->shared_dpll == pll) - active_crtcs++; + enabled_crtcs |= 1 << drm_crtc_index(&crtc->base); + if (crtc->base.state->active && crtc->config->shared_dpll == pll) + active_crtcs |= 1 << drm_crtc_index(&crtc->base); } - I915_STATE_WARN(pll->active != active_crtcs, - "pll active crtcs mismatch (expected %i, found %i)\n", - pll->active, active_crtcs); - I915_STATE_WARN(hweight32(pll->config.crtc_mask) != enabled_crtcs, - "pll enabled crtcs mismatch (expected %i, found %i)\n", - hweight32(pll->config.crtc_mask), enabled_crtcs); + + I915_STATE_WARN(pll->active_mask != active_crtcs, + "pll active crtcs mismatch (expected %x, found %x)\n", + pll->active_mask, active_crtcs); + I915_STATE_WARN(pll->config.crtc_mask != enabled_crtcs, + "pll enabled crtcs mismatch (expected %x, found %x)\n", + pll->config.crtc_mask, enabled_crtcs); I915_STATE_WARN(pll->on && memcmp(&pll->config.hw_state, &dpll_hw_state, sizeof(dpll_hw_state)), @@ -15694,14 +15695,12 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) pll->on = pll->funcs.get_hw_state(dev_priv, pll, &pll->config.hw_state); - pll->active = 0; pll->config.crtc_mask = 0; for_each_intel_crtc(dev, crtc) { - if (crtc->active && crtc->config->shared_dpll == pll) { - pll->active++; + if (crtc->active && crtc->config->shared_dpll == pll) pll->config.crtc_mask |= 1 << crtc->pipe; - } } + pll->active_mask = pll->config.crtc_mask; DRM_DEBUG_KMS("%s hw state readout: crtc_mask 0x%08x, on %i\n", pll->name, pll->config.crtc_mask, pll->on); @@ -15825,7 +15824,7 @@ intel_modeset_setup_hw_state(struct drm_device *dev) for (i = 0; i < dev_priv->num_shared_dpll; i++) { struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i]; - if (!pll->on || pll->active) + if (!pll->on || pll->active_mask) continue; DRM_DEBUG_KMS("%s enabled but not in use, disabling\n", pll->name); diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c index 74d5aecc0be5..9bf2c3914625 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c @@ -90,7 +90,7 @@ void intel_prepare_shared_dpll(struct intel_crtc *crtc) return; WARN_ON(!pll->config.crtc_mask); - if (pll->active == 0) { + if (pll->active_mask == 0) { DRM_DEBUG_DRIVER("setting up %s\n", pll->name); WARN_ON(pll->on); assert_shared_dpll_disabled(dev_priv, pll); @@ -112,18 +112,23 @@ void intel_enable_shared_dpll(struct intel_crtc *crtc) struct drm_device *dev = crtc->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_shared_dpll *pll = crtc->config->shared_dpll; + unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base); + unsigned old_mask = pll->active_mask; if (WARN_ON(pll == NULL)) return; - if (WARN_ON(pll->config.crtc_mask == 0)) + if (WARN_ON(!(pll->config.crtc_mask & crtc_mask)) || + WARN_ON(pll->active_mask & crtc_mask)) return; - DRM_DEBUG_KMS("enable %s (active %d, on? %d) for crtc %d\n", - pll->name, pll->active, pll->on, + pll->active_mask |= crtc_mask; + + DRM_DEBUG_KMS("enable %s (active %x, on? %d) for crtc %d\n", + pll->name, pll->active_mask, pll->on, crtc->base.base.id); - if (pll->active++) { + if (old_mask) { WARN_ON(!pll->on); assert_shared_dpll_enabled(dev_priv, pll); return; @@ -142,6 +147,7 @@ void intel_disable_shared_dpll(struct intel_crtc *crtc) struct drm_device *dev = crtc->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_shared_dpll *pll = crtc->config->shared_dpll; + unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base); /* PCH only available on ILK+ */ if (INTEL_INFO(dev)->gen < 5) @@ -150,21 +156,18 @@ void intel_disable_shared_dpll(struct intel_crtc *crtc) if (pll == NULL) return; - if (WARN_ON(!(pll->config.crtc_mask & (1 << drm_crtc_index(&crtc->base))))) + if (WARN_ON(!(pll->config.crtc_mask & crtc_mask))) return; - DRM_DEBUG_KMS("disable %s (active %d, on? %d) for crtc %d\n", - pll->name, pll->active, pll->on, + DRM_DEBUG_KMS("disable %s (active %x, on? %d) for crtc %d\n", + pll->name, pll->active_mask, pll->on, crtc->base.base.id); - if (WARN_ON(pll->active == 0)) { - assert_shared_dpll_disabled(dev_priv, pll); - return; - } - assert_shared_dpll_enabled(dev_priv, pll); WARN_ON(!pll->on); - if (--pll->active) + + pll->active_mask &= ~crtc_mask; + if (pll->active_mask) return; DRM_DEBUG_KMS("disabling %s\n", pll->name); @@ -197,10 +200,10 @@ intel_find_shared_dpll(struct intel_crtc *crtc, if (memcmp(&crtc_state->dpll_hw_state, &shared_dpll[i].hw_state, sizeof(crtc_state->dpll_hw_state)) == 0) { - DRM_DEBUG_KMS("CRTC:%d sharing existing %s (crtc mask 0x%08x, ative %d)\n", + DRM_DEBUG_KMS("CRTC:%d sharing existing %s (crtc mask 0x%08x, active %x)\n", crtc->base.base.id, pll->name, shared_dpll[i].crtc_mask, - pll->active); + pll->active_mask); return pll; } } diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.h b/drivers/gpu/drm/i915/intel_dpll_mgr.h index 1d341472f8b0..89c5ada1a315 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.h +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.h @@ -115,7 +115,7 @@ struct intel_shared_dpll_funcs { struct intel_shared_dpll { struct intel_shared_dpll_config config; - int active; /* count of number of active CRTCs (i.e. DPMS on) */ + unsigned active_mask; /* mask of active CRTCs (i.e. DPMS on) */ bool on; /* is the PLL actually active? Disabled during modeset */ const char *name; /* should match the index in the dev_priv->shared_dplls array */ -- 2.20.1