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received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: RQNte740bDyZN5a3FF5OTifBoMftWaamImBb2W2llSCc/j/9xuXxM8iNM18tWx2fSWJZqtdVjthkunVHrvu/MsLOkmh2d07CGlIYt6kGMf1gY8P1jdLR1WiCb3kpeJ0UWwOdUElPKz+V5ulsvNGzIjnyPzzRRjozu5VTxe2xIR+XISBIjLcY/2mWHdwvc2/7l8O850HLrQwY7ZWEYbG4cmmSh25lGBA9gxmKrDJf/+bYn6C5K49WPz6jHoNI58OvYtLgUGY8UWUWq1oKv3nKZFfU5nv5bO0GVpBKu/80U/+e+rPDz5lF5lQoZPq3k0B6AdOq8E5cQct+G7dcL9cawFoUyOAQdNlBAmwuetiujht+VePuqAyeeMqUYJsga5hevb9Kf0azFDmLflrTLforO4IAh7YowU7rtKOAh0s2yv8= Content-Type: text/plain; charset="us-ascii" Content-ID: <1D20EC5A20FD7B409C5D4ADBE9FE35A1@eurprd08.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-Network-Message-Id: 29e66dc1-94ca-466d-db64-08d6b4635326 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Mar 2019 16:26:41.1402 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB5076 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 28, 2019 at 07:25:00AM +0000, Lowry Li (Arm Technology China) w= rote: > Fixing the DMA mapping sg segment warning, which shows "DMA-API: mapping > sg segment longer than device claims to support [len=3D921600] [max=3D655= 36]". > Fixed by setting the max segment size at Komeda driver. >=20 > Signed-off-by: Lowry Li > --- > drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 4 ++++ > drivers/gpu/drm/arm/display/komeda/komeda_dev.h | 1 + > 2 files changed, 5 insertions(+) >=20 > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gp= u/drm/arm/display/komeda/komeda_dev.c > index 7f25e6a..b4902ae 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c > @@ -8,6 +8,7 @@ > #include > #include > #include > +#include > #ifdef CONFIG_DEBUG_FS > #include > #include > @@ -245,6 +246,9 @@ struct komeda_dev *komeda_dev_create(struct device *d= ev) > goto err_cleanup; > } > =20 > + dev->dma_parms =3D &mdev->dma_parms; > + dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); > + > err =3D sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); > if (err) { > DRM_ERROR("create sysfs group failed.\n"); > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gp= u/drm/arm/display/komeda/komeda_dev.h > index 0c3e32b..d8cfa92 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h > @@ -146,6 +146,7 @@ enum { > */ > struct komeda_dev { > struct device *dev; > + struct device_dma_parameters dma_parms; > u32 __iomem *reg_base; > =20 > struct komeda_chip_info chip; > --=20 Please rebase and test your patches on drm-misc-next.=20 https://drm.pages.freedesktop.org/maintainer-tools/repositories.html > 1.9.1