ALSA: hda - use usleep_range in link reset and change timeout check

Reducing the time on HDA link reset can help to reduce the driver loading
time. So we replace msleep with usleep_range to get more accurate time
control and change the value to a smaller one. And a 100ms timeout is set
for both entering and exiting the link reset.

Signed-off-by: Xingchao Wang <xingchao.wang@intel.com>
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index a9cd18b..d00dea0 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1054,7 +1054,7 @@ static void azx_power_notify(struct hda_bus *bus, bool power_up);
 /* reset codec link */
 static int azx_reset(struct azx *chip, int full_reset)
 {
-       int count;
+       unsigned long timeout;
 
        if (!full_reset)
                goto __skip;
@@ -1065,24 +1065,26 @@ static int azx_reset(struct azx *chip, int full_reset)
        /* reset controller */
        azx_writel(chip, GCTL, azx_readl(chip, GCTL) & ~ICH6_GCTL_RESET);
 
-       count = 50;
-       while (azx_readb(chip, GCTL) && --count)
-               msleep(1);
+       timeout = jiffies + msecs_to_jiffies(100);
+       while (azx_readb(chip, GCTL) &&
+                       time_before(jiffies, timeout))
+               usleep_range(500, 1000);
 
        /* delay for >= 100us for codec PLL to settle per spec
         * Rev 0.9 section 5.5.1
         */
-       msleep(1);
+       usleep_range(500, 1000);
 
        /* Bring controller out of reset */
        azx_writeb(chip, GCTL, azx_readb(chip, GCTL) | ICH6_GCTL_RESET);
 
-       count = 50;
-       while (!azx_readb(chip, GCTL) && --count)
-               msleep(1);
+       timeout = jiffies + msecs_to_jiffies(100);
+       while (!azx_readb(chip, GCTL) &&
+                       time_before(jiffies, timeout))
+               usleep_range(500, 1000);
 
        /* Brent Chartrand said to wait >= 540us for codecs to initialize */
-       msleep(1);
+       usleep_range(1000, 1200);
 
       __skip:
        /* check to see if controller is ready */