6.9-stable review patch. If anyone has any objections, please let me know.
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From: Imre Deak imre.deak@intel.com
commit 75800e2e4203ea83bbc9d4f63ad97ea582244a08 upstream.
After registering the audio component in i915_audio_component_init() the audio driver may call i915_audio_component_get_power() via the component ops. This could program AUD_FREQ_CNTRL with an uninitialized value if the latter function is called before display.audio.freq_cntrl gets initialized. The get_power() function also does a modeset which in the above case happens too early before the initialization step and triggers the
"Reject display access from task"
error message added by the Fixes: commit below.
Fix the above issue by registering the audio component only after the initialization step.
Fixes: 87c1694533c9 ("drm/i915: save AUD_FREQ_CNTRL state at audio domain suspend") Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10291 Cc: stable@vger.kernel.org # v5.5+ Signed-off-by: Imre Deak imre.deak@intel.com Reviewed-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20240521143022.3784539-1-imre.... (cherry picked from commit fdd0b80172758ce284f19fa8a26d90c61e4371d2) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_audio.c | 32 +++++++++++++------- drivers/gpu/drm/i915/display/intel_audio.h | 1 drivers/gpu/drm/i915/display/intel_display_driver.c | 2 + 3 files changed, 24 insertions(+), 11 deletions(-)
--- a/drivers/gpu/drm/i915/display/intel_audio.c +++ b/drivers/gpu/drm/i915/display/intel_audio.c @@ -1252,17 +1252,6 @@ static const struct component_ops i915_a static void i915_audio_component_init(struct drm_i915_private *i915) { u32 aud_freq, aud_freq_init; - int ret; - - ret = component_add_typed(i915->drm.dev, - &i915_audio_component_bind_ops, - I915_COMPONENT_AUDIO); - if (ret < 0) { - drm_err(&i915->drm, - "failed to add audio component (%d)\n", ret); - /* continue with reduced functionality */ - return; - }
if (DISPLAY_VER(i915) >= 9) { aud_freq_init = intel_de_read(i915, AUD_FREQ_CNTRL); @@ -1285,6 +1274,21 @@ static void i915_audio_component_init(st
/* init with current cdclk */ intel_audio_cdclk_change_post(i915); +} + +static void i915_audio_component_register(struct drm_i915_private *i915) +{ + int ret; + + ret = component_add_typed(i915->drm.dev, + &i915_audio_component_bind_ops, + I915_COMPONENT_AUDIO); + if (ret < 0) { + drm_err(&i915->drm, + "failed to add audio component (%d)\n", ret); + /* continue with reduced functionality */ + return; + }
i915->display.audio.component_registered = true; } @@ -1317,6 +1321,12 @@ void intel_audio_init(struct drm_i915_pr i915_audio_component_init(i915); }
+void intel_audio_register(struct drm_i915_private *i915) +{ + if (!i915->display.audio.lpe.platdev) + i915_audio_component_register(i915); +} + /** * intel_audio_deinit() - deinitialize the audio driver * @i915: the i915 drm device private data --- a/drivers/gpu/drm/i915/display/intel_audio.h +++ b/drivers/gpu/drm/i915/display/intel_audio.h @@ -28,6 +28,7 @@ void intel_audio_codec_get_config(struct void intel_audio_cdclk_change_pre(struct drm_i915_private *dev_priv); void intel_audio_cdclk_change_post(struct drm_i915_private *dev_priv); void intel_audio_init(struct drm_i915_private *dev_priv); +void intel_audio_register(struct drm_i915_private *i915); void intel_audio_deinit(struct drm_i915_private *dev_priv); void intel_audio_sdp_split_update(const struct intel_crtc_state *crtc_state);
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c +++ b/drivers/gpu/drm/i915/display/intel_display_driver.c @@ -542,6 +542,8 @@ void intel_display_driver_register(struc
intel_display_driver_enable_user_access(i915);
+ intel_audio_register(i915); + intel_display_debugfs_register(i915);
/*