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| author | Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> | 2024-10-30 12:33:19 +0200 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2024-10-31 12:03:17 -0700 |
| commit | 98d2f2530fcc62efcfc816ac5ca352269db95765 (patch) | |
| tree | 2c7f2acaee4cf71af8b896e349b17dd90e7d47f9 /drivers/gpu/drm/i915/display/intel_display_irq.c | |
| parent | 1f12d63a14d7f858c0fab9824102c9a9cc08004d (diff) | |
| download | linux-98d2f2530fcc62efcfc816ac5ca352269db95765.tar.gz linux-98d2f2530fcc62efcfc816ac5ca352269db95765.tar.bz2 linux-98d2f2530fcc62efcfc816ac5ca352269db95765.zip | |
drm/i915: Implement Dbuf overlap detection feature starting from LNL
From LNL onwards there is a new hardware feature, which
allows to detect if the driver wrongly allocated DBuf
entries and they happen to overlap. If enabled this will
cause a specific interrupt to occur.
We now handle it in the driver, by writing correspondent
error message to kernel log.
v2: Initialize dbuf overlap flag in runtime_defaults (Jani Nikula)
v3: Unmask the overlap detection interrupt (Uma)
v4: use display over i915 (Jani Nikula)
v5: Use display instead of dev_priv (Jani Nikula)
v6: rebased to resolve merge conflicts
Bspec: 69450, 69464
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241030103319.207235-1-vinod.govindapillai@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_display_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_irq.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c index 0478fe3cdd86..e1547ebce60e 100644 --- a/drivers/gpu/drm/i915/display/intel_display_irq.c +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c @@ -903,6 +903,13 @@ gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir) struct intel_display *display = &dev_priv->display; bool found = false; + if (HAS_DBUF_OVERLAP_DETECTION(display)) { + if (iir & XE2LPD_DBUF_OVERLAP_DETECTED) { + drm_warn(display->drm, "DBuf overlap detected\n"); + found = true; + } + } + if (DISPLAY_VER(dev_priv) >= 14) { if (iir & (XELPDP_PMDEMAND_RSP | XELPDP_PMDEMAND_RSPTOUT_ERR)) { @@ -1790,6 +1797,9 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) de_port_masked |= DSI0_TE | DSI1_TE; } + if (HAS_DBUF_OVERLAP_DETECTION(display)) + de_misc_masked |= XE2LPD_DBUF_OVERLAP_DETECTED; + if (HAS_DSB(dev_priv)) de_pipe_masked |= GEN12_DSB_INT(INTEL_DSB_0) | GEN12_DSB_INT(INTEL_DSB_1) | |