CI system spotted an error on CFL system when running IGT tests with display disabled. In this case, the 'INTEL_INFO(dev_priv)->num_pipes' is set to 0. This will cause that we prematurely return from 'get_saved_enc()'.
To fix this issue, the patch introduces a 'max_pipes' variable which caches the maximum number of available pipes. Reference: https://bugs.freedesktop.org/show_bug.cgi?id=103206 Signed-off-by: Mika Kahola <mika.kah...@intel.com> --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_audio.c | 2 +- drivers/gpu/drm/i915/intel_device_info.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 770305b..6229ff8 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -868,6 +868,7 @@ struct intel_device_info { u8 num_pipes; u8 num_sprites[I915_MAX_PIPES]; u8 num_scalers[I915_MAX_PIPES]; + u8 max_pipes; unsigned int page_sizes; /* page sizes supported by the HW */ diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index 0ddba16..147bd3d 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -754,7 +754,7 @@ static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv, { struct intel_encoder *encoder; - if (WARN_ON(pipe >= INTEL_INFO(dev_priv)->num_pipes)) + if (WARN_ON(pipe >= INTEL_INFO(dev_priv)->max_pipes)) return NULL; /* MST */ diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index 875d428..ba1a807 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -376,6 +376,8 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) info->num_sprites[pipe] = 1; } + info->max_pipes = info->num_pipes; + if (i915_modparams.disable_display) { DRM_INFO("Display disabled (module parameter)\n"); info->num_pipes = 0; -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
