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author | Maarten Lankhorst | 2016-03-14 09:27:52 +0100 |
---|---|---|
committer | Maarten Lankhorst | 2016-03-17 09:27:28 +0100 |
commit | 2dd66ebde4431c93bfa211bc967a6f2089283aa6 (patch) | |
tree | 851fc8e93ae3b23d8105a86d7bccf3952a808e68 /drivers/gpu/drm/i915/intel_display.c | |
parent | drm/i915: Fix race condition in intel_dp_destroy_mst_connector() (diff) | |
download | kernel-qcow2-linux-2dd66ebde4431c93bfa211bc967a6f2089283aa6.tar.gz kernel-qcow2-linux-2dd66ebde4431c93bfa211bc967a6f2089283aa6.tar.xz kernel-qcow2-linux-2dd66ebde4431c93bfa211bc967a6f2089283aa6.zip |
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 <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457944075-14123-2-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 43 |
1 files changed, 21 insertions, 22 deletions
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); |