ALSA: hda: program GSC ID

For HDA as client to have access to APR region, it should transmit the
correct AID(aperture ID or GSC ID). Currently CO-10 is used for APR and
it expects the AID to be matching. So this has to be programmed in
HDA_HDA_GSC_ID_0 (addr: 0x35101e0)

Bug 200371345

Change-Id: I3e162f175afd394da07da1df8726904f7ea034ff
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1662249
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 3ae56622f..9e5fa4192 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -83,6 +83,9 @@ static const struct of_device_id tegra_disb_pd[] = {
 #define NUM_CAPTURE_SD 1
 #define NUM_PLAYBACK_SD 1
 
+/* GSC_ID register */
+#define HDA_GSC_REG             0x1e0
+
 struct hda_tegra {
         struct azx chip;
         struct device *dev;
@@ -686,7 +689,7 @@ static void hda_tegra_probe_work(struct work_struct *work)
         struct azx *chip = &hda->chip;
         struct platform_device *pdev = to_platform_device(hda->dev);
         struct device_node *np = pdev->dev.of_node;
-        int num_codec_slots = 0;
+        int num_codec_slots = 0, gsc_id;
         struct hdac_bus *bus = azx_bus(chip);
         int err;
 
@@ -708,6 +711,10 @@ static void hda_tegra_probe_work(struct work_struct *work)
                 azx_fpci_writel(chip, BUFSZ_NUM_OF_FRAMES, 0x000a0a0a);
         }
 
+        /* program HDA GSC_ID to get access to APR */
+        if (of_property_read_u32(np, "nvidia,apr-gsc-id", &gsc_id) >= 0)
+                hda_tegra_writel(gsc_id, hda->regs + HDA_GSC_REG);
+
         /* create codec instances */
         err = azx_probe_codecs(chip, num_codec_slots);
         if (err < 0)