ASoC: WM8994: Don't disable the AIF[1|2]CLK_ENA unconditionaly

Since we began using the late clock disable functionality, ensure that
we don't disable the clock if any of the ADC or DAC paths are still
enabled. This happens when we have simultaneous playback and recording.

Signed-off-by: Dimitris Papastamos <[e-mail]>
Acked-by: Liam Girdwood <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>
Cc: [e-mail]

sound/soc/codecs/wm8994.c

···
 
 	unsigned int aif1clk_enable:1;
 	unsigned int aif2clk_enable:1;
+
+	unsigned int aif1clk_disable:1;
+	unsigned int aif2clk_disable:1;
 };
 
 static int wm8994_readable(unsigned int reg)
···
 
 	switch (event) {
 	case SND_SOC_DAPM_PRE_PMU:
-		if (wm8994->aif1clk_enable)
+		if (wm8994->aif1clk_enable) {
 			snd_soc_update_bits(codec, WM8994_AIF1_CLOCKING_1,
 					    WM8994_AIF1CLK_ENA_MASK,
 					    WM8994_AIF1CLK_ENA);
-		if (wm8994->aif2clk_enable)
+			wm8994->aif1clk_enable = 0;
+		}
+		if (wm8994->aif2clk_enable) {
 			snd_soc_update_bits(codec, WM8994_AIF2_CLOCKING_1,
 					    WM8994_AIF2CLK_ENA_MASK,
 					    WM8994_AIF2CLK_ENA);
+			wm8994->aif2clk_enable = 0;
+		}
 		break;
 	}
 
···
 
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMD:
-		if (wm8994->aif1clk_enable) {
+		if (wm8994->aif1clk_disable) {
 			snd_soc_update_bits(codec, WM8994_AIF1_CLOCKING_1,
 					    WM8994_AIF1CLK_ENA_MASK, 0);
-			wm8994->aif1clk_enable = 0;
+			wm8994->aif1clk_disable = 0;
 		}
-		if (wm8994->aif2clk_enable) {
+		if (wm8994->aif2clk_disable) {
 			snd_soc_update_bits(codec, WM8994_AIF2_CLOCKING_1,
 					    WM8994_AIF2CLK_ENA_MASK, 0);
-			wm8994->aif2clk_enable = 0;
+			wm8994->aif2clk_disable = 0;
 		}
 		break;
 	}
···
 	case SND_SOC_DAPM_PRE_PMU:
 		wm8994->aif1clk_enable = 1;
 		break;
+	case SND_SOC_DAPM_POST_PMD:
+		wm8994->aif1clk_disable = 1;
+		break;
 	}
 
 	return 0;
···
 	switch (event) {
 	case SND_SOC_DAPM_PRE_PMU:
 		wm8994->aif2clk_enable = 1;
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		wm8994->aif2clk_disable = 1;
 		break;
 	}