Patch "usb: dwc2: host: Fix hibernation flow" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    usb: dwc2: host: Fix hibernation flow

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-dwc2-host-fix-hibernation-flow.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 3c7b9856a82227db01a20171d2e24c7ce305d59b Mon Sep 17 00:00:00 2001
From: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>
Date: Wed, 13 Mar 2024 09:21:11 +0000
Subject: usb: dwc2: host: Fix hibernation flow

From: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>

commit 3c7b9856a82227db01a20171d2e24c7ce305d59b upstream.

Added to backup/restore registers HFLBADDR, HCCHARi, HCSPLTi,
HCTSIZi, HCDMAi and HCDMABi.

Fixes: 58e52ff6a6c3 ("usb: dwc2: Move register save and restore functions")
Fixes: d17ee77b3044 ("usb: dwc2: add controller hibernation support")
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/c2d10ee6098b9b009a8e94191e046004747d3bdd.1708945444.git.Minas.Harutyunyan@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/dwc2/core.h |   12 ++++++++++++
 drivers/usb/dwc2/hcd.c  |   18 ++++++++++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -716,8 +716,14 @@ struct dwc2_dregs_backup {
  * struct dwc2_hregs_backup - Holds host registers state before
  * entering partial power down
  * @hcfg:		Backup of HCFG register
+ * @hflbaddr:		Backup of HFLBADDR register
  * @haintmsk:		Backup of HAINTMSK register
+ * @hcchar:		Backup of HCCHAR register
+ * @hcsplt:		Backup of HCSPLT register
  * @hcintmsk:		Backup of HCINTMSK register
+ * @hctsiz:		Backup of HCTSIZ register
+ * @hdma:		Backup of HCDMA register
+ * @hcdmab:		Backup of HCDMAB register
  * @hprt0:		Backup of HPTR0 register
  * @hfir:		Backup of HFIR register
  * @hptxfsiz:		Backup of HPTXFSIZ register
@@ -725,8 +731,14 @@ struct dwc2_dregs_backup {
  */
 struct dwc2_hregs_backup {
 	u32 hcfg;
+	u32 hflbaddr;
 	u32 haintmsk;
+	u32 hcchar[MAX_EPS_CHANNELS];
+	u32 hcsplt[MAX_EPS_CHANNELS];
 	u32 hcintmsk[MAX_EPS_CHANNELS];
+	u32 hctsiz[MAX_EPS_CHANNELS];
+	u32 hcidma[MAX_EPS_CHANNELS];
+	u32 hcidmab[MAX_EPS_CHANNELS];
 	u32 hprt0;
 	u32 hfir;
 	u32 hptxfsiz;
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5480,9 +5480,16 @@ int dwc2_backup_host_registers(struct dw
 	/* Backup Host regs */
 	hr = &hsotg->hr_backup;
 	hr->hcfg = dwc2_readl(hsotg, HCFG);
+	hr->hflbaddr = dwc2_readl(hsotg, HFLBADDR);
 	hr->haintmsk = dwc2_readl(hsotg, HAINTMSK);
-	for (i = 0; i < hsotg->params.host_channels; ++i)
+	for (i = 0; i < hsotg->params.host_channels; ++i) {
+		hr->hcchar[i] = dwc2_readl(hsotg, HCCHAR(i));
+		hr->hcsplt[i] = dwc2_readl(hsotg, HCSPLT(i));
 		hr->hcintmsk[i] = dwc2_readl(hsotg, HCINTMSK(i));
+		hr->hctsiz[i] = dwc2_readl(hsotg, HCTSIZ(i));
+		hr->hcidma[i] = dwc2_readl(hsotg, HCDMA(i));
+		hr->hcidmab[i] = dwc2_readl(hsotg, HCDMAB(i));
+	}
 
 	hr->hprt0 = dwc2_read_hprt0(hsotg);
 	hr->hfir = dwc2_readl(hsotg, HFIR);
@@ -5516,10 +5523,17 @@ int dwc2_restore_host_registers(struct d
 	hr->valid = false;
 
 	dwc2_writel(hsotg, hr->hcfg, HCFG);
+	dwc2_writel(hsotg, hr->hflbaddr, HFLBADDR);
 	dwc2_writel(hsotg, hr->haintmsk, HAINTMSK);
 
-	for (i = 0; i < hsotg->params.host_channels; ++i)
+	for (i = 0; i < hsotg->params.host_channels; ++i) {
+		dwc2_writel(hsotg, hr->hcchar[i], HCCHAR(i));
+		dwc2_writel(hsotg, hr->hcsplt[i], HCSPLT(i));
 		dwc2_writel(hsotg, hr->hcintmsk[i], HCINTMSK(i));
+		dwc2_writel(hsotg, hr->hctsiz[i], HCTSIZ(i));
+		dwc2_writel(hsotg, hr->hcidma[i], HCDMA(i));
+		dwc2_writel(hsotg, hr->hcidmab[i], HCDMAB(i));
+	}
 
 	dwc2_writel(hsotg, hr->hprt0, HPRT0);
 	dwc2_writel(hsotg, hr->hfir, HFIR);


Patches currently in stable-queue which might be from Minas.Harutyunyan@xxxxxxxxxxxx are

queue-4.19/usb-dwc2-host-fix-remote-wakeup-from-hibernation.patch
queue-4.19/usb-dwc2-gadget-lpm-flow-fix.patch
queue-4.19/usb-dwc2-host-fix-isoc-flow-in-ddma-mode.patch
queue-4.19/usb-dwc2-host-fix-hibernation-flow.patch




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