[alsa-devel] [PATCH 1/2] ALSA: hda - Load firmware in hda_intel.c
Takashi Iwai
tiwai at suse.de
Thu Aug 9 15:10:37 CEST 2012
This is a preliminary work for the deferred probing for
request_firmware() errors at init.
This patch moves the call of request_firmware() to hda_intel.c, and
call it in the earlier stage of probing rather than
azx_probe_continue().
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/pci/hda/hda_codec.h | 2 +-
sound/pci/hda/hda_hwdep.c | 39 +++++++++++++--------------------------
sound/pci/hda/hda_intel.c | 29 ++++++++++++++++++++++++-----
3 files changed, 38 insertions(+), 32 deletions(-)
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index c422d33..39e43753 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -1072,7 +1072,7 @@ static inline void snd_hda_power_down(struct hda_codec *codec) {}
/*
* patch firmware
*/
-int snd_hda_load_patch(struct hda_bus *bus, const char *patch);
+int snd_hda_load_patch(struct hda_bus *bus, size_t size, const void *buf);
#endif
/*
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 6b2efb8..b9a644c 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -25,7 +25,6 @@
#include <linux/mutex.h>
#include <linux/ctype.h>
#include <linux/string.h>
-#include <linux/firmware.h>
#include <linux/export.h>
#include <sound/core.h>
#include "hda_codec.h"
@@ -747,18 +746,21 @@ static int parse_line_mode(char *buf, struct hda_bus *bus)
*
* the spaces at the beginning and the end of the line are stripped
*/
-static int get_line_from_fw(char *buf, int size, struct firmware *fw)
+static int get_line_from_fw(char *buf, int size, size_t *fw_size_p,
+ const void **fw_data_p)
{
int len;
- const char *p = fw->data;
- while (isspace(*p) && fw->size) {
+ size_t fw_size = *fw_size_p;
+ const char *p = *fw_data_p;
+
+ while (isspace(*p) && fw_size) {
p++;
- fw->size--;
+ fw_size--;
}
- if (!fw->size)
+ if (!fw_size)
return 0;
- for (len = 0; len < fw->size; len++) {
+ for (len = 0; len < fw_size; len++) {
if (!*p)
break;
if (*p == '\n') {
@@ -770,8 +772,8 @@ static int get_line_from_fw(char *buf, int size, struct firmware *fw)
*buf++ = *p++;
}
*buf = 0;
- fw->size -= len;
- fw->data = p;
+ *fw_size_p = fw_size - len;
+ *fw_data_p = p;
remove_trail_spaces(buf);
return 1;
}
@@ -779,29 +781,15 @@ static int get_line_from_fw(char *buf, int size, struct firmware *fw)
/*
* load a "patch" firmware file and parse it
*/
-int snd_hda_load_patch(struct hda_bus *bus, const char *patch)
+int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
{
- int err;
- const struct firmware *fw;
- struct firmware tmp;
char buf[128];
struct hda_codec *codec;
int line_mode;
- struct device *dev = bus->card->dev;
-
- if (snd_BUG_ON(!dev))
- return -ENODEV;
- err = request_firmware(&fw, patch, dev);
- if (err < 0) {
- printk(KERN_ERR "hda-codec: Cannot load the patch '%s'\n",
- patch);
- return err;
- }
- tmp = *fw;
line_mode = LINE_MODE_NONE;
codec = NULL;
- while (get_line_from_fw(buf, sizeof(buf) - 1, &tmp)) {
+ while (get_line_from_fw(buf, sizeof(buf) - 1, &fw_size, &fw_buf)) {
if (!*buf || *buf == '#' || *buf == '\n')
continue;
if (*buf == '[')
@@ -810,7 +798,6 @@ int snd_hda_load_patch(struct hda_bus *bus, const char *patch)
(codec || !patch_items[line_mode].need_codec))
patch_items[line_mode].parser(buf, bus, &codec);
}
- release_firmware(fw);
return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_load_patch);
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index c8aced1..b25d539 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -55,6 +55,7 @@
#include <sound/initval.h>
#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
+#include <linux/firmware.h>
#include "hda_codec.h"
@@ -470,6 +471,10 @@ struct azx {
struct snd_dma_buffer rb;
struct snd_dma_buffer posbuf;
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+ const struct firmware *fw;
+#endif
+
/* flags */
int position_fix[2]; /* for both playback/capture streams */
int poll_count;
@@ -2639,6 +2644,10 @@ static int azx_free(struct azx *chip)
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip->azx_dev);
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+ if (chip->fw)
+ release_firmware(chip->fw);
+#endif
kfree(chip);
return 0;
@@ -3167,7 +3176,6 @@ static int __devinit azx_probe(struct pci_dev *pci,
return err;
}
- /* set this here since it's referred in snd_hda_load_patch() */
snd_card_set_dev(card, &pci->dev);
err = azx_create(card, pci, dev, pci_id->driver_data, &chip);
@@ -3175,6 +3183,16 @@ static int __devinit azx_probe(struct pci_dev *pci,
goto out_free;
card->private_data = chip;
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+ if (patch[dev] && *patch[dev]) {
+ snd_printk(KERN_ERR SFX "Applying patch firmware '%s'\n",
+ patch[dev]);
+ err = request_firmware(&chip->fw, patch[dev], &pci->dev);
+ if (err < 0)
+ goto out_free;
+ }
+#endif /* CONFIG_SND_HDA_PATCH_LOADER */
+
if (!chip->disabled) {
err = azx_probe_continue(chip);
if (err < 0)
@@ -3205,12 +3223,13 @@ static int DELAYED_INIT_MARK azx_probe_continue(struct azx *chip)
if (err < 0)
goto out_free;
#ifdef CONFIG_SND_HDA_PATCH_LOADER
- if (patch[dev] && *patch[dev]) {
- snd_printk(KERN_ERR SFX "Applying patch firmware '%s'\n",
- patch[dev]);
- err = snd_hda_load_patch(chip->bus, patch[dev]);
+ if (chip->fw) {
+ err = snd_hda_load_patch(chip->bus, chip->fw->size,
+ chip->fw->data);
if (err < 0)
goto out_free;
+ release_firmware(chip->fw); /* no longer needed */
+ chip->fw = NULL;
}
#endif
if ((probe_only[dev] & 1) == 0) {
--
1.7.11.4
More information about the Alsa-devel
mailing list