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-rw-r--r--sound/hda/hdac_device.c10
-rw-r--r--sound/hda/hdac_i915.c60
-rw-r--r--sound/hda/hdac_regmap.c40
3 files changed, 82 insertions, 28 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index d1a4d6973330..03c9872c31cf 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -299,13 +299,11 @@ EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
int parm)
{
- int val;
+ unsigned int cmd, val;
- if (codec->regmap)
- regcache_cache_bypass(codec->regmap, true);
- val = snd_hdac_read_parm(codec, nid, parm);
- if (codec->regmap)
- regcache_cache_bypass(codec->regmap, false);
+ cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
+ if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
+ return -1;
return val;
}
EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
index 6800e0c5a38f..c9af022676c2 100644
--- a/sound/hda/hdac_i915.c
+++ b/sound/hda/hdac_i915.c
@@ -20,6 +20,7 @@
#include <sound/core.h>
#include <sound/hdaudio.h>
#include <sound/hda_i915.h>
+#include <sound/hda_register.h>
static struct i915_audio_component *hdac_acomp;
@@ -97,26 +98,65 @@ int snd_hdac_display_power(struct hdac_bus *bus, bool enable)
}
EXPORT_SYMBOL_GPL(snd_hdac_display_power);
+#define CONTROLLER_IN_GPU(pci) (((pci)->device == 0x0a0c) || \
+ ((pci)->device == 0x0c0c) || \
+ ((pci)->device == 0x0d0c) || \
+ ((pci)->device == 0x160c))
+
/**
- * snd_hdac_get_display_clk - Get CDCLK in kHz
+ * snd_hdac_i915_set_bclk - Reprogram BCLK for HSW/BDW
* @bus: HDA core bus
*
- * This function is supposed to be used only by a HD-audio controller
- * driver that needs the interaction with i915 graphics.
+ * Intel HSW/BDW display HDA controller is in GPU. Both its power and link BCLK
+ * depends on GPU. Two Extended Mode registers EM4 (M value) and EM5 (N Value)
+ * are used to convert CDClk (Core Display Clock) to 24MHz BCLK:
+ * BCLK = CDCLK * M / N
+ * The values will be lost when the display power well is disabled and need to
+ * be restored to avoid abnormal playback speed.
*
- * This function queries CDCLK value in kHz from the graphics driver and
- * returns the value. A negative code is returned in error.
+ * Call this function at initializing and changing power well, as well as
+ * at ELD notifier for the hotplug.
*/
-int snd_hdac_get_display_clk(struct hdac_bus *bus)
+void snd_hdac_i915_set_bclk(struct hdac_bus *bus)
{
struct i915_audio_component *acomp = bus->audio_component;
+ struct pci_dev *pci = to_pci_dev(bus->dev);
+ int cdclk_freq;
+ unsigned int bclk_m, bclk_n;
+
+ if (!acomp || !acomp->ops || !acomp->ops->get_cdclk_freq)
+ return; /* only for i915 binding */
+ if (!CONTROLLER_IN_GPU(pci))
+ return; /* only HSW/BDW */
+
+ cdclk_freq = acomp->ops->get_cdclk_freq(acomp->dev);
+ switch (cdclk_freq) {
+ case 337500:
+ bclk_m = 16;
+ bclk_n = 225;
+ break;
- if (!acomp || !acomp->ops)
- return -ENODEV;
+ case 450000:
+ default: /* default CDCLK 450MHz */
+ bclk_m = 4;
+ bclk_n = 75;
+ break;
+
+ case 540000:
+ bclk_m = 4;
+ bclk_n = 90;
+ break;
+
+ case 675000:
+ bclk_m = 8;
+ bclk_n = 225;
+ break;
+ }
- return acomp->ops->get_cdclk_freq(acomp->dev);
+ snd_hdac_chip_writew(bus, HSW_EM4, bclk_m);
+ snd_hdac_chip_writew(bus, HSW_EM5, bclk_n);
}
-EXPORT_SYMBOL_GPL(snd_hdac_get_display_clk);
+EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk);
/* There is a fixed mapping between audio pin node and display port.
* on SNB, IVY, HSW, BSW, SKL, BXT, KBL:
diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c
index bdbcd6b75ff6..87041ddd29cb 100644
--- a/sound/hda/hdac_regmap.c
+++ b/sound/hda/hdac_regmap.c
@@ -453,14 +453,30 @@ int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
- unsigned int *val)
+ unsigned int *val, bool uncached)
{
- if (!codec->regmap)
+ if (uncached || !codec->regmap)
return hda_reg_read(codec, reg, val);
else
return regmap_read(codec->regmap, reg, val);
}
+static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
+ unsigned int reg, unsigned int *val,
+ bool uncached)
+{
+ int err;
+
+ err = reg_raw_read(codec, reg, val, uncached);
+ if (err == -EAGAIN) {
+ err = snd_hdac_power_up_pm(codec);
+ if (!err)
+ err = reg_raw_read(codec, reg, val, uncached);
+ snd_hdac_power_down_pm(codec);
+ }
+ return err;
+}
+
/**
* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
* @codec: the codec object
@@ -472,19 +488,19 @@ static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
unsigned int *val)
{
- int err;
-
- err = reg_raw_read(codec, reg, val);
- if (err == -EAGAIN) {
- err = snd_hdac_power_up_pm(codec);
- if (!err)
- err = reg_raw_read(codec, reg, val);
- snd_hdac_power_down_pm(codec);
- }
- return err;
+ return __snd_hdac_regmap_read_raw(codec, reg, val, false);
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
+/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
+ * cache but always via hda verbs.
+ */
+int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
+ unsigned int reg, unsigned int *val)
+{
+ return __snd_hdac_regmap_read_raw(codec, reg, val, true);
+}
+
/**
* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
* @codec: the codec object