[Intel-gfx] [PATCH v3] drm/i915: Beef up the IPS vs. CRC workaround
ville.syrjala at linux.intel.com
ville.syrjala at linux.intel.com
Thu Aug 17 14:55:09 UTC 2017
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
Oneshot disabling of IPS when CRC capturing is started is insufficient.
IPS may get re-enabled by any plane update, and hence tests that keep
CRC capturing on across plane updates will start to see inconsistent
results as soon as IPS kicks back in. Add a new knob into the crtc state
to make sure IPS stays disabled as long as CRC capturing is enabled.
Forcing a modeset is the easiest way to handle this since that's already
how we do the panel fitter workaround. It's a little heavy handed just
for IPS, but seeing as we might already do the panel fitter workaround
I think it's better to follow that. We migth want to optimize both cases
later if someone gets too upset by the extra delay from the modeset.
v2: Check the right thing when deciding whether to force a modeset
v3: Rebase, check HAS_IPS before forcing a modeset,
move ips_force_disable check into pipe_config_supports_ips()
Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Marta Lofstedt <marta.lofstedt at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101664
Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
Tested-by: Marta Lofsted <marta.lofstedt at intel.com> #v2
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 7 +++-
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_pipe_crc.c | 62 ++++++++++++++++-------------------
3 files changed, 36 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0e93ec201fe3..e8a24b59c91c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6263,6 +6263,9 @@ static int ironlake_fdi_compute_config(struct intel_crtc *intel_crtc,
static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
struct intel_crtc_state *pipe_config)
{
+ if (pipe_config->ips_force_disable)
+ return false;
+
if (pipe_config->pipe_bpp > 24)
return false;
@@ -10830,7 +10833,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
struct intel_dpll_hw_state dpll_hw_state;
struct intel_shared_dpll *shared_dpll;
struct intel_crtc_wm_state wm_state;
- bool force_thru;
+ bool force_thru, ips_force_disable;
/* FIXME: before the switch to atomic started, a new pipe_config was
* kzalloc'd. Code that depends on any field being zero should be
@@ -10841,6 +10844,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
shared_dpll = crtc_state->shared_dpll;
dpll_hw_state = crtc_state->dpll_hw_state;
force_thru = crtc_state->pch_pfit.force_thru;
+ ips_force_disable = crtc_state->ips_force_disable;
if (IS_G4X(dev_priv) ||
IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
wm_state = crtc_state->wm;
@@ -10854,6 +10858,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
crtc_state->shared_dpll = shared_dpll;
crtc_state->dpll_hw_state = dpll_hw_state;
crtc_state->pch_pfit.force_thru = force_thru;
+ crtc_state->ips_force_disable = ips_force_disable;
if (IS_G4X(dev_priv) ||
IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
crtc_state->wm = wm_state;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index fa47285918f4..8a9db2279bbd 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -753,6 +753,7 @@ struct intel_crtc_state {
struct intel_link_m_n fdi_m_n;
bool ips_enabled;
+ bool ips_force_disable;
bool enable_fbc;
diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c b/drivers/gpu/drm/i915/intel_pipe_crc.c
index 8fbd2bd0877f..4e22bb927fed 100644
--- a/drivers/gpu/drm/i915/intel_pipe_crc.c
+++ b/drivers/gpu/drm/i915/intel_pipe_crc.c
@@ -506,8 +506,8 @@ static int ilk_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source,
return 0;
}
-static void hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private *dev_priv,
- bool enable)
+static void hsw_pipe_A_crc_wa(struct drm_i915_private *dev_priv,
+ bool enable)
{
struct drm_device *dev = &dev_priv->drm;
struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
@@ -533,10 +533,24 @@ static void hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private *dev_priv,
goto put_state;
}
- pipe_config->pch_pfit.force_thru = enable;
- if (pipe_config->cpu_transcoder == TRANSCODER_EDP &&
- pipe_config->pch_pfit.enabled != enable)
- pipe_config->base.connectors_changed = true;
+ if (HAS_IPS(dev_priv)) {
+ /*
+ * When IPS gets enabled, the pipe CRC changes. Since IPS gets
+ * enabled and disabled dynamically based on package C states,
+ * user space can't make reliable use of the CRCs, so let's just
+ * completely disable it.
+ */
+ pipe_config->ips_force_disable = enable;
+ if (pipe_config->ips_enabled == enable)
+ pipe_config->base.connectors_changed = true;
+ }
+
+ if (IS_HASWELL(dev_priv)) {
+ pipe_config->pch_pfit.force_thru = enable;
+ if (pipe_config->cpu_transcoder == TRANSCODER_EDP &&
+ pipe_config->pch_pfit.enabled != enable)
+ pipe_config->base.connectors_changed = true;
+ }
ret = drm_atomic_commit(state);
@@ -570,8 +584,9 @@ static int ivb_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_SPRITE_IVB;
break;
case INTEL_PIPE_CRC_SOURCE_PF:
- if (IS_HASWELL(dev_priv) && pipe == PIPE_A)
- hsw_trans_edp_pipe_A_crc_wa(dev_priv, true);
+ if ((IS_HASWELL(dev_priv) ||
+ IS_BROADWELL(dev_priv)) && pipe == PIPE_A)
+ hsw_pipe_A_crc_wa(dev_priv, true);
*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PF_IVB;
break;
@@ -606,7 +621,6 @@ static int pipe_crc_set_source(struct drm_i915_private *dev_priv,
enum intel_pipe_crc_source source)
{
struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
- struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
enum intel_display_power_domain power_domain;
u32 val = 0; /* shut up gcc */
int ret;
@@ -643,14 +657,6 @@ static int pipe_crc_set_source(struct drm_i915_private *dev_priv,
goto out;
}
- /*
- * When IPS gets enabled, the pipe CRC changes. Since IPS gets
- * enabled and disabled dynamically based on package C states,
- * user space can't make reliable use of the CRCs, so let's just
- * completely disable it.
- */
- hsw_disable_ips(crtc);
-
spin_lock_irq(&pipe_crc->lock);
kfree(pipe_crc->entries);
pipe_crc->entries = entries;
@@ -691,10 +697,9 @@ static int pipe_crc_set_source(struct drm_i915_private *dev_priv,
g4x_undo_pipe_scramble_reset(dev_priv, pipe);
else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_undo_pipe_scramble_reset(dev_priv, pipe);
- else if (IS_HASWELL(dev_priv) && pipe == PIPE_A)
- hsw_trans_edp_pipe_A_crc_wa(dev_priv, false);
-
- hsw_enable_ips(crtc);
+ else if ((IS_HASWELL(dev_priv) ||
+ IS_BROADWELL(dev_priv)) && pipe == PIPE_A)
+ hsw_pipe_A_crc_wa(dev_priv, false);
}
ret = 0;
@@ -935,16 +940,6 @@ int intel_crtc_set_crc_source(struct drm_crtc *crtc, const char *source_name,
if (ret != 0)
goto out;
- if (source) {
- /*
- * When IPS gets enabled, the pipe CRC changes. Since IPS gets
- * enabled and disabled dynamically based on package C states,
- * user space can't make reliable use of the CRCs, so let's just
- * completely disable it.
- */
- hsw_disable_ips(intel_crtc);
- }
-
I915_WRITE(PIPE_CRC_CTL(crtc->index), val);
POSTING_READ(PIPE_CRC_CTL(crtc->index));
@@ -953,8 +948,9 @@ int intel_crtc_set_crc_source(struct drm_crtc *crtc, const char *source_name,
g4x_undo_pipe_scramble_reset(dev_priv, crtc->index);
else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_undo_pipe_scramble_reset(dev_priv, crtc->index);
- else if (IS_HASWELL(dev_priv) && crtc->index == PIPE_A)
- hsw_trans_edp_pipe_A_crc_wa(dev_priv, false);
+ else if ((IS_HASWELL(dev_priv) ||
+ IS_BROADWELL(dev_priv)) && crtc->index == PIPE_A)
+ hsw_pipe_A_crc_wa(dev_priv, false);
hsw_enable_ips(intel_crtc);
}
--
2.13.0
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