From d3902c3eba3666f001fa82fa16109aa4ab0074dc Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Mon, 4 May 2015 17:20:49 +0300 Subject: [PATCH] drm/i915/audio: do not mess with audio registers if port is invalid We should no longer enter the codec enable/disable functions in question with port A anyway, but to err on the safe side, keep the warnings. Just bail out early without messing with the registers. Signed-off-by: Jani Nikula Reviewed-by: Sivakumar Thulasimani Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_audio.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index f72e93a45e11..c4312177b0ee 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -269,6 +269,9 @@ static void ilk_audio_codec_disable(struct intel_encoder *encoder) DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n", port_name(port), pipe_name(pipe)); + if (WARN_ON(port == PORT_A)) + return; + if (HAS_PCH_IBX(dev_priv->dev)) { aud_config = IBX_AUD_CFG(pipe); aud_cntrl_st2 = IBX_AUD_CNTL_ST2; @@ -290,12 +293,7 @@ static void ilk_audio_codec_disable(struct intel_encoder *encoder) tmp |= AUD_CONFIG_N_VALUE_INDEX; I915_WRITE(aud_config, tmp); - if (WARN_ON(!port)) { - eldv = IBX_ELD_VALID(PORT_B) | IBX_ELD_VALID(PORT_C) | - IBX_ELD_VALID(PORT_D); - } else { - eldv = IBX_ELD_VALID(port); - } + eldv = IBX_ELD_VALID(port); /* Invalidate ELD */ tmp = I915_READ(aud_cntrl_st2); @@ -325,6 +323,9 @@ static void ilk_audio_codec_enable(struct drm_connector *connector, DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n", port_name(port), pipe_name(pipe), drm_eld_size(eld)); + if (WARN_ON(port == PORT_A)) + return; + /* * FIXME: We're supposed to wait for vblank here, but we have vblanks * disabled during the mode set. The proper fix would be to push the @@ -349,12 +350,7 @@ static void ilk_audio_codec_enable(struct drm_connector *connector, aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; } - if (WARN_ON(!port)) { - eldv = IBX_ELD_VALID(PORT_B) | IBX_ELD_VALID(PORT_C) | - IBX_ELD_VALID(PORT_D); - } else { - eldv = IBX_ELD_VALID(port); - } + eldv = IBX_ELD_VALID(port); /* Invalidate ELD */ tmp = I915_READ(aud_cntrl_st2); -- 2.20.1