Merge tag 'mhi-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi into char-misc-next

Manivannan writes:
  "MHI Host:

   Core:
   - Use mhi_soc_reset() API for resetting the modem in case of crash.
   - Fixed a race condition between mhi_prepare_channel() and M0 state
     transition. This can happen when mhi_prepare_channel() was updating the
     read/write pointers and in parallel, the mhi_pm_m0_transition() rings
     the doorbell of all channels without checking if it was enabled or not.
     Fixed the race by ringing the doorbell only for the enabled channels in
     mhi_pm_m0_transition().

   pci_generic:
   - Added a secondary "AT" port using the OEM reserved channel of Telit FN990
     modem.
   - Added support for a SDX55 variant modem that exists in the Qualcomm
     SC8280XP Compute Reference Design (CRD).
   - Added support for a T99W175 variant modem manufactured by HP. The modem
     uses the same configuration as of T99W175, but with a different VID:PID.
   - Added local definitions for some VIDs (Thales and Quectel).

   MAINTAINERS:
   - Removed Hemant from MHI MAINTAINERS list since he left Qualcomm and
     expressed his wish to not continue doing reviews for MHI patches."

* tag 'mhi-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi:
  bus: mhi: host: pci_generic: Add definition for some VIDs
  bus: mhi: host: pci_generic: Add HP variant of T99W175
  bus: mhi: host: pci_generic: add support for sc8280xp-crd SDX55 variant
  MAINTAINERS: Remove Hemant from MHI bus
  bus: mhi: host: pci_generic: Add a secondary AT port to Telit FN990
  bus: mhi: host: Fix race between channel preparation and M0 event
  bus: mhi: host: Use mhi_soc_reset() API in place of register write

4 files changed, 21 insertions, 12 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 2585e7edc335..38bae79369a3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13405,7 +13405,6 @@ F:	arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
 
 MHI BUS
 M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
-R:	Hemant Kumar <quic_hemantk@quicinc.com>
 L:	mhi@lists.linux.dev
 L:	linux-arm-msm@vger.kernel.org
 S:	Maintained
diff --git a/drivers/bus/mhi/host/boot.c b/drivers/bus/mhi/host/boot.c
index 26d0eddb1477..1c69feee1703 100644
--- a/drivers/bus/mhi/host/boot.c
+++ b/drivers/bus/mhi/host/boot.c
@@ -118,9 +118,7 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
 			/* Hardware reset so force device to enter RDDM */
 			dev_dbg(dev,
 				"Did not enter RDDM, do a host req reset\n");
-			mhi_write_reg(mhi_cntrl, mhi_cntrl->regs,
-				      MHI_SOC_RESET_REQ_OFFSET,
-				      MHI_SOC_RESET_REQ);
+			mhi_soc_reset(mhi_cntrl);
 			udelay(delayus);
 		}
 
diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index caa4ce28cf9e..f39657f71483 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -24,6 +24,10 @@
 
 #define HEALTH_CHECK_PERIOD (HZ * 2)
 
+/* PCI VID definitions */
+#define PCI_VENDOR_ID_THALES	0x1269
+#define PCI_VENDOR_ID_QUECTEL	0x1eac
+
 /**
  * struct mhi_pci_dev_info - MHI PCI device specific information
  * @config: MHI controller configuration
@@ -340,6 +344,8 @@ static const struct mhi_channel_config mhi_foxconn_sdx55_channels[] = {
 	MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
 	MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
 	MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(92, "DUN2", 32, 1),
+	MHI_CHANNEL_CONFIG_DL(93, "DUN2", 32, 1),
 	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0_MBIM", 128, 2),
 	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
 };
@@ -542,6 +548,8 @@ static const struct mhi_pci_dev_info mhi_telit_fn990_info = {
 static const struct pci_device_id mhi_pci_id_table[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0304),
 		.driver_data = (kernel_ulong_t) &mhi_qcom_sdx24_info },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, PCI_VENDOR_ID_QCOM, 0x010c),
+		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
 	/* EM919x (sdx55), use the same vid:pid as qcom-sdx55m */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x18d7, 0x0200),
 		.driver_data = (kernel_ulong_t) &mhi_sierra_em919x_info },
@@ -555,11 +563,11 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 		.driver_data = (kernel_ulong_t) &mhi_telit_fn990_info },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0308),
 		.driver_data = (kernel_ulong_t) &mhi_qcom_sdx65_info },
-	{ PCI_DEVICE(0x1eac, 0x1001), /* EM120R-GL (sdx24) */
+	{ PCI_DEVICE(PCI_VENDOR_ID_QUECTEL, 0x1001), /* EM120R-GL (sdx24) */
 		.driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
-	{ PCI_DEVICE(0x1eac, 0x1002), /* EM160R-GL (sdx24) */
+	{ PCI_DEVICE(PCI_VENDOR_ID_QUECTEL, 0x1002), /* EM160R-GL (sdx24) */
 		.driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
-	{ PCI_DEVICE(0x1eac, 0x2001), /* EM120R-GL for FCCL (sdx24) */
+	{ PCI_DEVICE(PCI_VENDOR_ID_QUECTEL, 0x2001), /* EM120R-GL for FCCL (sdx24) */
 		.driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
 	/* T99W175 (sdx55), Both for eSIM and Non-eSIM */
 	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0ab),
@@ -583,17 +591,20 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0d9),
 		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx65_info },
 	/* MV31-W (Cinterion) */
-	{ PCI_DEVICE(0x1269, 0x00b3),
+	{ PCI_DEVICE(PCI_VENDOR_ID_THALES, 0x00b3),
 		.driver_data = (kernel_ulong_t) &mhi_mv31_info },
 	/* MV31-W (Cinterion), based on new baseline */
-	{ PCI_DEVICE(0x1269, 0x00b4),
+	{ PCI_DEVICE(PCI_VENDOR_ID_THALES, 0x00b4),
 		.driver_data = (kernel_ulong_t) &mhi_mv31_info },
 	/* MV32-WA (Cinterion) */
-	{ PCI_DEVICE(0x1269, 0x00ba),
+	{ PCI_DEVICE(PCI_VENDOR_ID_THALES, 0x00ba),
 		.driver_data = (kernel_ulong_t) &mhi_mv32_info },
 	/* MV32-WB (Cinterion) */
-	{ PCI_DEVICE(0x1269, 0x00bb),
+	{ PCI_DEVICE(PCI_VENDOR_ID_THALES, 0x00bb),
 		.driver_data = (kernel_ulong_t) &mhi_mv32_info },
+	/* T99W175 (sdx55), HP variant */
+	{ PCI_DEVICE(0x03f0, 0x0a6c),
+		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
 	{  }
 };
 MODULE_DEVICE_TABLE(pci, mhi_pci_id_table);
diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
index 4a42186ff111..083459028a4b 100644
--- a/drivers/bus/mhi/host/pm.c
+++ b/drivers/bus/mhi/host/pm.c
@@ -301,7 +301,8 @@ int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl)
 		read_lock_irq(&mhi_chan->lock);
 
 		/* Only ring DB if ring is not empty */
-		if (tre_ring->base && tre_ring->wp  != tre_ring->rp)
+		if (tre_ring->base && tre_ring->wp  != tre_ring->rp &&
+		    mhi_chan->ch_state == MHI_CH_STATE_ENABLED)
 			mhi_ring_chan_db(mhi_cntrl, mhi_chan);
 		read_unlock_irq(&mhi_chan->lock);
 	}