drm/i915/audio: port is going to be just fine, simplify checks

If it was wrong, we'd be screwed already.

Cc: Libin Yang <libin.yang@linux.intel.com>
Reviewed-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/8cf454ccefc05b234aa81c45a4ce9018e7c9324f.1476111629.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index d452e7b..58a222f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -251,8 +251,9 @@ static void hsw_audio_config_update(struct intel_crtc *intel_crtc,
 {
        struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
        struct i915_audio_component *acomp = dev_priv->audio_component;
+       int rate = acomp ? acomp->aud_sample_rate[port] : 0;
        enum pipe pipe = intel_crtc->pipe;
-       int n, rate;
+       int n;
        u32 tmp;
 
        tmp = I915_READ(HSW_AUD_CFG(pipe));
@@ -265,15 +266,6 @@ static void hsw_audio_config_update(struct intel_crtc *intel_crtc,
 
        tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
        if (audio_rate_need_prog(intel_crtc, adjusted_mode)) {
-               if (!acomp)
-                       rate = 0;
-               else if (port >= PORT_A && port <= PORT_E)
-                       rate = acomp->aud_sample_rate[port];
-               else {
-                       DRM_ERROR("invalid port: %d\n", port);
-                       rate = 0;
-               }
-
                n = audio_config_get_n(adjusted_mode, rate);
                if (n != 0)
                        tmp = audio_config_setup_n_reg(n, tmp);