[Intel-gfx] [PATCH 1/4] drm/i915: Use a crtc mask instead of a refcount for dpll functions.
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Mon Feb 29 12:52:20 UTC 2016
This makes it easier to verify correct dpll setup with only a single crtc.
It it also useful to detect double dpll enable/disable.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_display.c | 68 ++++++++++++++++++++----------------
3 files changed, 40 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index c6e64e2c951e..200e45922587 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3211,7 +3211,7 @@ static int i915_shared_dplls_info(struct seq_file *m, void *unused)
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));
+ pll->config.crtc_mask, hweight32(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/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 10480939159c..c7401b50818c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -392,7 +392,7 @@ struct intel_shared_dpll_config {
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 */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a5d61084ae98..5dd59cae9f06 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1866,7 +1866,7 @@ static 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);
@@ -1888,6 +1888,7 @@ static 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 = intel_crtc_to_shared_dpll(crtc);
+ unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base);
if (WARN_ON(pll == NULL))
return;
@@ -1895,11 +1896,16 @@ static void intel_enable_shared_dpll(struct intel_crtc *crtc)
if (WARN_ON(pll->config.crtc_mask == 0))
return;
+ if (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->name, hweight32(pll->active_mask), pll->on,
crtc->base.base.id);
- if (pll->active++) {
+ pll->active_mask |= crtc_mask;
+
+ if (pll->active_mask != crtc_mask) {
WARN_ON(!pll->on);
assert_shared_dpll_enabled(dev_priv, pll);
return;
@@ -1918,30 +1924,33 @@ static 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 = intel_crtc_to_shared_dpll(crtc);
+ unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base);
/* PCH only available on ILK+ */
- if (INTEL_INFO(dev)->gen < 5)
+ if (INTEL_INFO(dev_priv)->gen < 5)
return;
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,
+ if (WARN_ON(!(pll->active_mask & crtc_mask)))
+ return;
+
+ 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)) {
+ pll->active_mask &= ~crtc_mask;
+ if (pll->active_mask) {
assert_shared_dpll_disabled(dev_priv, pll);
return;
}
assert_shared_dpll_enabled(dev_priv, pll);
WARN_ON(!pll->on);
- if (--pll->active)
- return;
DRM_DEBUG_KMS("disabling %s\n", pll->name);
pll->disable(dev_priv, pll);
@@ -4294,10 +4303,10 @@ struct intel_shared_dpll *intel_get_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 0x%08x)\n",
crtc->base.base.id, pll->name,
shared_dpll[i].crtc_mask,
- pll->active);
+ pll->active_mask);
goto found;
}
}
@@ -12952,12 +12961,12 @@ check_shared_dpll_state(struct drm_device *dev)
active = pll->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,
+ 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);
+ I915_STATE_WARN(pll->active_mask && !pll->on,
"pll in active use but not on in sw tracking\n");
- I915_STATE_WARN(pll->on && !pll->active,
+ I915_STATE_WARN(pll->on && !pll->active_mask,
"pll in on but not on in use in sw tracking\n");
I915_STATE_WARN(pll->on != active,
"pll on state mismatch (expected %i, found %i)\n",
@@ -12965,16 +12974,16 @@ check_shared_dpll_state(struct drm_device *dev)
for_each_intel_crtc(dev, crtc) {
if (crtc->base.state->enable && intel_crtc_to_shared_dpll(crtc) == pll)
- enabled_crtcs++;
+ enabled_crtcs |= 1 << drm_crtc_index(&crtc->base);
if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll)
- active_crtcs++;
+ 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)),
@@ -15760,14 +15769,13 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
pll->on = pll->get_hw_state(dev_priv, pll,
&pll->config.hw_state);
- pll->active = 0;
+ pll->active_mask = 0;
pll->config.crtc_mask = 0;
for_each_intel_crtc(dev, crtc) {
- if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll) {
- pll->active++;
+ if (crtc->active && intel_crtc_to_shared_dpll(crtc) == 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);
@@ -15889,7 +15897,7 @@ 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);
--
2.1.0
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