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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: d44eb7be-75df-4b2a-1ac5-08d70ed45f33 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Jul 2019 18:42:38.7915 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c33c9f88-1eb7-4099-9700-16013fd9e8aa X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: abrodkin@synopsys.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1201MB0023 X-OriginatorOrg: synopsys.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Eugeniy, > -----Original Message----- > From: Eugeniy Paltsev > Sent: Monday, July 22, 2019 12:32 PM > To: linux-snps-arc@lists.infradead.org; Vineet Gupta > Cc: linux-kernel@vger.kernel.org; Alexey Brodkin ;= Eugeniy Paltsev > > Subject: [PATCH v2] ARC: [plat-hsdk]: allow to switch between AXI DMAC po= rt configurations >=20 > We want to use DW AXI DMAC on HSDK board in our automated verification > to test cache & dma kernel code changes. This is perfect candidate > as we don't depend on any external peripherals like MMC card / USB > storage / etc. > To increase test coverage we want to test both options: > * DW AXI DMAC is connected through IOC port & dma direct ops used > * DW AXI DMAC is connected to DDR port & dma noncoherent ops used >=20 > Introduce 'arc_hsdk_axi_dmac_coherent' global variable which can be > modified by debugger (same way as we patch 'ioc_enable') to switch > between these options without recompiling the kernel. > Depend on this value we tweak memory bridge configuration and > "dma-coherent" DTS property of DW AXI DMAC. Looks good to me. Acked-by: Alexey Brodkin -Thanks