From 48e4d089dc68ad29267fe6b9c7efc4a66611aeda Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 4 Dec 2008 15:21:40 +0100
Subject: [PATCH] Fix softvol access refine

The commit a13707da6bb0161db855a146c3e4d1d849e4108b

    pcm_softvol plugin: remove access type change for refine

breaks the softvol in the case of RW -> MMAP.  The slave of softvol
must be an mmap although the previous fix forces RW access.

This patch reverts the commit, and the fixed access refine method
to hanle non-interleaved <-> interleaved changes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 src/pcm/pcm_softvol.c |   56 +++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/src/pcm/pcm_softvol.c b/src/pcm/pcm_softvol.c
index 4c5f0f7..637e5cb 100644
--- a/src/pcm/pcm_softvol.c
+++ b/src/pcm/pcm_softvol.c
@@ -399,6 +399,7 @@ static int snd_pcm_softvol_hw_refine_cprepare(snd_pcm_t *pcm,
 {
 	int err;
 	snd_pcm_softvol_t *svol = pcm->private_data;
+	snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM };
 	snd_pcm_format_mask_t format_mask = {
 		{
 			(1ULL << SND_PCM_FORMAT_S16_LE) |
@@ -412,6 +413,10 @@ static int snd_pcm_softvol_hw_refine_cprepare(snd_pcm_t *pcm,
 		snd_pcm_format_mask_none(&format_mask);
 		snd_pcm_format_mask_set(&format_mask, svol->sformat);
 	}
+	err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS,
+					 &access_mask);
+	if (err < 0)
+		return err;
 	err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
 					 &format_mask);
 	if (err < 0)
@@ -429,7 +434,10 @@ static int snd_pcm_softvol_hw_refine_cprepare(snd_pcm_t *pcm,
 static int snd_pcm_softvol_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams)
 {
 	snd_pcm_softvol_t *svol = pcm->private_data;
+	snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP };
 	_snd_pcm_hw_params_any(sparams);
+	_snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS,
+				   &saccess_mask);
 	if (svol->sformat != SND_PCM_FORMAT_UNKNOWN) {
 		_snd_pcm_hw_params_set_format(sparams, svol->sformat);
 		_snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD);
@@ -437,14 +445,45 @@ static int snd_pcm_softvol_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_
 	return 0;
 }
 
+/*
+ * refine the access mask
+ */
+static int check_access_mask(snd_pcm_hw_params_t *src,
+			     snd_pcm_hw_params_t *dst)
+{
+	const snd_pcm_access_mask_t *mask;
+	snd_pcm_access_mask_t smask;
+
+	mask = snd_pcm_hw_param_get_mask(src, SND_PCM_HW_PARAM_ACCESS);
+	snd_mask_none(&smask);
+	if (snd_pcm_access_mask_test(mask, SND_PCM_ACCESS_RW_INTERLEAVED) ||
+	    snd_pcm_access_mask_test(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED)) {
+		snd_pcm_access_mask_set(&smask,
+					SND_PCM_ACCESS_RW_INTERLEAVED);
+		snd_pcm_access_mask_set(&smask,
+					SND_PCM_ACCESS_MMAP_INTERLEAVED);
+	}
+	if (snd_pcm_access_mask_test(mask, SND_PCM_ACCESS_RW_NONINTERLEAVED) ||
+	    snd_pcm_access_mask_test(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED))  {
+		snd_pcm_access_mask_set(&smask,
+					SND_PCM_ACCESS_RW_NONINTERLEAVED);
+		snd_pcm_access_mask_set(&smask,
+					SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
+	}
+	if (snd_pcm_access_mask_test(mask, SND_PCM_ACCESS_MMAP_COMPLEX))
+		snd_pcm_access_mask_set(&smask,
+					SND_PCM_ACCESS_MMAP_COMPLEX);
+
+	return _snd_pcm_hw_param_set_mask(dst, SND_PCM_HW_PARAM_ACCESS, &smask);
+}
+
 static int snd_pcm_softvol_hw_refine_schange(snd_pcm_t *pcm,
 					     snd_pcm_hw_params_t *params,
 					     snd_pcm_hw_params_t *sparams)
 {
 	snd_pcm_softvol_t *svol = pcm->private_data;
 	int err;
-	unsigned int links = (SND_PCM_HW_PARBIT_ACCESS |
-			      SND_PCM_HW_PARBIT_CHANNELS |
+	unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
 			      SND_PCM_HW_PARBIT_RATE |
 			      SND_PCM_HW_PARBIT_PERIODS |
 			      SND_PCM_HW_PARBIT_PERIOD_SIZE |
@@ -459,6 +498,11 @@ static int snd_pcm_softvol_hw_refine_schange(snd_pcm_t *pcm,
 	err = _snd_pcm_hw_params_refine(sparams, links, params);
 	if (err < 0)
 		return err;
+
+	err = check_access_mask(params, sparams);
+	if (err < 0)
+		return err;
+
 	return 0;
 }
 	
@@ -468,8 +512,7 @@ static int snd_pcm_softvol_hw_refine_cchange(snd_pcm_t *pcm,
 {
 	snd_pcm_softvol_t *svol = pcm->private_data;
 	int err;
-	unsigned int links = (SND_PCM_HW_PARBIT_ACCESS |
-			      SND_PCM_HW_PARBIT_CHANNELS |
+	unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
 			      SND_PCM_HW_PARBIT_RATE |
 			      SND_PCM_HW_PARBIT_PERIODS |
 			      SND_PCM_HW_PARBIT_PERIOD_SIZE |
@@ -484,6 +527,11 @@ static int snd_pcm_softvol_hw_refine_cchange(snd_pcm_t *pcm,
 	err = _snd_pcm_hw_params_refine(params, links, sparams);
 	if (err < 0)
 		return err;
+
+	err = check_access_mask(sparams, params);
+	if (err < 0)
+		return err;
+
 	return 0;
 }
 
-- 
1.6.1.2