Re: [PATCH 2/2] drm/i915/audio: do not mess with audio registers if port is invalid

From: Daniel Vetter <daniel@ffwll.ch>
To: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 2/2] drm/i915/audio: do not mess with audio registers if port is invalid
Date: Wed, 6 May 2015 13:11:56 +0200	[thread overview]
Message-ID: <20150506111156.GX30184@phenom.ffwll.local> (raw)
In-Reply-To: <55485628.7070009@intel.com>

On Tue, May 05, 2015 at 11:03:28AM +0530, Sivakumar Thulasimani wrote:
> Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
> 
> On 5/4/2015 7:50 PM, Jani Nikula wrote:
> >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 <jani.nikula@intel.com>

Queued for -next, thanks for the patch.
-Daniel

> >---
> >  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);
> 
> -- 
> regards,
> Sivakumar
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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