From: Yong Wu <yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
To: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Matthias Brugger
<matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: youlin.pei-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Nicolas Boichat
<drinkcat-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
arnd-r2nGTMty4D4@public.gmane.org,
srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Tomasz Figa <tfiga-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
yingjoe.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH 04/13] iommu/mediatek: Add device_link between the consumer and the larb devices
Date: Tue, 1 Jan 2019 12:51:07 +0800 [thread overview]
Message-ID: <1546318276-18993-5-git-send-email-yong.wu@mediatek.com> (raw)
In-Reply-To: <1546318276-18993-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
MediaTek IOMMU don't have its power-domain. all the consumer connect
with smi-larb, then connect with smi-common.
M4U
|
smi-common
|
-------------
| | ...
| |
larb1 larb2
| |
vdec venc
When the consumer works, it should enable the smi-larb's power which
also need enable the smi-common's power firstly.
Thus, First of all, use the device link connect the consumer and the
smi-larbs. then add device link between the smi-larb and smi-common.
This patch adds device_link between the consumer and the larbs.
Suggested-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Signed-off-by: Yong Wu <yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
drivers/iommu/mtk_iommu.c | 15 +++++++++++++--
drivers/iommu/mtk_iommu_v1.c | 14 ++++++++++++--
2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 202e41b..735ae8d 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -247,6 +247,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ struct device_link *link;
int i;
for (i = 0; i < fwspec->num_ids; ++i) {
@@ -257,10 +258,20 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
dev_dbg(dev, "%s iommu port: %d\n",
enable ? "enable" : "disable", portid);
- if (enable)
+ if (enable) {
larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
- else
+ /* Link the consumer with the larb device(supplier) */
+ link = device_link_add(dev, larb_mmu->dev,
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_AUTOREMOVE_CONSUMER);
+ if (!link) {
+ dev_err(dev, "Unable to link %s\n",
+ dev_name(larb_mmu->dev));
+ return;
+ }
+ } else {
larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ }
}
}
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index 9386aee..022bad9 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -201,6 +201,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ struct device_link *link;
int i;
for (i = 0; i < fwspec->num_ids; ++i) {
@@ -211,10 +212,19 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
dev_dbg(dev, "%s iommu port: %d\n",
enable ? "enable" : "disable", portid);
- if (enable)
+ if (enable) {
larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
- else
+ link = device_link_add(dev, larb_mmu->dev,
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_AUTOREMOVE_CONSUMER);
+ if (!link) {
+ dev_err(dev, "Unable to link %s\n",
+ dev_name(larb_mmu->dev));
+ return;
+ }
+ } else {
larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ }
}
}
--
1.9.1
next prev parent reply other threads:[~2019-01-01 4:51 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-01 4:51 [PATCH 00/13] Clean up "mediatek,larb" after adding device_link Yong Wu
2019-01-01 4:51 ` [PATCH 07/13] media: mtk-mdp: Get rid of mtk_smi_larb_get/put Yong Wu
[not found] ` <1546318276-18993-8-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:55 ` Evan Green
[not found] ` <1546318276-18993-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-01 4:51 ` [PATCH 01/13] dt-binding: mediatek: Get rid of mediatek, larb for multimedia HW Yong Wu
2019-01-11 14:58 ` [PATCH 01/13] dt-binding: mediatek: Get rid of mediatek,larb " Rob Herring
2019-02-25 23:54 ` Evan Green
2019-01-01 4:51 ` [PATCH 02/13] driver core: Remove the link if there is no driver with AUTO flag Yong Wu
[not found] ` <1546318276-18993-3-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:53 ` Evan Green
2019-02-27 14:33 ` Yong Wu
2019-03-05 19:03 ` Evan Green
2019-03-12 14:21 ` Matthias Brugger
2019-03-12 23:17 ` Evan Green
2019-03-13 9:08 ` Yong Wu
2019-01-01 4:51 ` [PATCH 03/13] iommu/mediatek: Add probe_defer for smi-larb Yong Wu
[not found] ` <1546318276-18993-4-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:54 ` Evan Green
2019-02-27 14:33 ` Yong Wu
2019-03-05 19:02 ` Evan Green
2019-01-01 4:51 ` Yong Wu [this message]
2019-02-25 23:54 ` [PATCH 04/13] iommu/mediatek: Add device_link between the consumer and the larb devices Evan Green
2019-02-27 14:34 ` Yong Wu
2019-02-27 19:30 ` Robin Murphy
2019-03-13 9:11 ` Yong Wu
2019-01-01 4:51 ` [PATCH 05/13] memory: mtk-smi: Add device-link between smi-larb and smi-common Yong Wu
2019-02-25 23:54 ` Evan Green
2019-02-27 14:33 ` Yong Wu
2019-03-05 19:02 ` Evan Green
2019-01-01 4:51 ` [PATCH 06/13] media: mtk-jpeg: Get rid of mtk_smi_larb_get/put Yong Wu
2019-02-25 23:55 ` Evan Green
2019-01-01 4:51 ` [PATCH 08/13] media: mtk-vcodec: " Yong Wu
[not found] ` <1546318276-18993-9-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:55 ` Evan Green
2019-01-01 4:51 ` [PATCH 09/13] drm/mediatek: " Yong Wu
2019-02-25 23:55 ` Evan Green
2019-01-01 4:51 ` [PATCH 10/13] memory: mtk-smi: " Yong Wu
[not found] ` <1546318276-18993-11-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:56 ` Evan Green
2019-01-01 4:51 ` [PATCH 11/13] iommu/mediatek: Use builtin_platform_driver Yong Wu
[not found] ` <1546318276-18993-12-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:56 ` Evan Green
2019-02-27 14:33 ` Yong Wu
2019-03-05 19:03 ` Evan Green
2019-01-01 4:51 ` [PATCH 12/13] arm: dts: mediatek: Get rid of mediatek, larb for MM nodes Yong Wu
[not found] ` <1546318276-18993-13-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-02-25 23:56 ` Evan Green
2019-01-01 4:51 ` [PATCH 13/13] arm64: " Yong Wu
2019-02-25 23:56 ` Evan Green
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