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Mon, 20 Apr 2026 07:03:14 -0700 (PDT) X-Received: by 2002:a17:902:ef11:b0:2b0:67cc:adc3 with SMTP id d9443c01a7336-2b5f9ec6e37mr132049645ad.14.1776693793075; Mon, 20 Apr 2026 07:03:13 -0700 (PDT) Received: from [10.206.105.200] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b5faa34ea7sm105061225ad.34.2026.04.20.07.03.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Apr 2026 07:03:10 -0700 (PDT) Message-ID: Date: Mon, 20 Apr 2026 19:33:01 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: [PATCH 04/11] media: iris: Add helper to create a context bank device on iris vpu bus Content-Language: en-US To: Dmitry Baryshkov Cc: Bryan O'Donoghue , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joerg Roedel , Will Deacon , Robin Murphy , Bjorn Andersson , Konrad Dybcio , Stefan Schmidt , Hans Verkuil , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev References: <20260414-glymur-v1-0-7d3d1cf57b16@oss.qualcomm.com> <20260414-glymur-v1-4-7d3d1cf57b16@oss.qualcomm.com> From: Vishnu Reddy In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIwMDEzNyBTYWx0ZWRfX6HAM4wGJ6EV0 wwnCZbpdrL68oetXFugKn4YoYjyiqlYYSZeVZT1A3QcGXGk7iXMxRbPUkeVlNbPxdW30ttt1WHX vIrLv04U5M+P9VE999+gLztkVv9K3DAHdAotQqRkoYJgL8SRUJioUq5r2wI0om3v+pprkuYwgmQ dg752p+JdKcFnX8Oa9BSOVD4/XnTD8Wo2YDRHhvsUxW4sMBgUGrOYKz19D9GiUK0xJ6E9DJVsvc BkclDlHQSIgTFNN2Y+j68rW05SlPLdrw03cdzFEyolCrQJvqBRppPpurChE8iRd+3amKK/ZFHVz 4Laa5MRUvYElU3vOR/wkXN0ieLwDLm2acCh9pvU2i1/IlxS7MbN/9IF86F7aCSNuk+nYB7N2Kod ugkrcghge70F1eahHbfPHhtPejAMhwO/SQ5O3W8x/Fj1FAjinBL3xNSVBoxpPpDHJXupfyZ0rdG 5JL0HsftCtEwX/K/5/A== X-Proofpoint-GUID: QchpYmSiPJOTbHzGbQz0xJhcJesYreAV X-Authority-Analysis: v=2.4 cv=PMQ/P/qC c=1 sm=1 tr=0 ts=69e63222 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=N0hD6JmQrVrYO7jJexcA:9 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-ORIG-GUID: QchpYmSiPJOTbHzGbQz0xJhcJesYreAV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-20_03,2026-04-17_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604200137 On 4/17/2026 11:53 PM, Dmitry Baryshkov wrote: > On Fri, Apr 17, 2026 at 08:49:44PM +0530, Vishnu Reddy wrote: >> On 4/14/2026 8:48 PM, Dmitry Baryshkov wrote: >>> On Tue, Apr 14, 2026 at 10:30:00AM +0530, Vishnu Reddy wrote: >>>> From: Vikash Garodia >>>> >>>> Add a helper function to allocate and register context bank (CB) device >>>> on the iris vpu bus. The function ID associated with the CB is specified >>>> from the platform data, allowing the bus dma_configure callback to apply >>>> correct stream ID mapping when device is registered. >>>> >>>> Signed-off-by: Vikash Garodia >>>> Signed-off-by: Vishnu Reddy >>>> --- >>>> drivers/media/platform/qcom/iris/iris_resources.c | 33 +++++++++++++++++++++++ >>>> drivers/media/platform/qcom/iris/iris_resources.h | 1 + >>>> 2 files changed, 34 insertions(+) >>>> >>>> diff --git a/drivers/media/platform/qcom/iris/iris_resources.c b/drivers/media/platform/qcom/iris/iris_resources.c >>>> index 773f6548370a..a25e0f2e9d26 100644 >>>> --- a/drivers/media/platform/qcom/iris/iris_resources.c >>>> +++ b/drivers/media/platform/qcom/iris/iris_resources.c >>>> @@ -6,6 +6,7 @@ >>>> #include >>>> #include >>>> #include >>>> +#include >>>> #include >>>> #include >>>> #include >>>> @@ -141,3 +142,35 @@ int iris_disable_unprepare_clock(struct iris_core *core, enum platform_clk_type >>>> return 0; >>>> } >>>> + >>>> +static void iris_release_cb_dev(struct device *dev) >>>> +{ >>>> + kfree(dev); >>>> +} >>>> + >>>> +struct device *iris_create_cb_dev(struct iris_core *core, const char *name, const u32 *f_id) >>> Please move into the bus code and make it generic enough. >> Do you suggest to add a wrapper to pass the varying inputs to the generic >> bus, something like this >> struct device* create_and_register_device(dma_mask, parent_dev, *release, >> dev_name,...) > Definitely not the release function. The devname is also not that > important. The rest, yes, you are correct. > >>>> +{ >>>> + struct device *dev; >>>> + int ret; >>>> + >>>> + dev = kzalloc_obj(*dev); >>>> + if (!dev) >>>> + return ERR_PTR(-ENOMEM); >>>> + >>>> + dev->release = iris_release_cb_dev; >>>> + dev->bus = &iris_vpu_bus_type; >>>> + dev->parent = core->dev; >>>> + dev->coherent_dma_mask = core->iris_platform_data->dma_mask; >>>> + dev->dma_mask = &dev->coherent_dma_mask; >>> Would you also need to set the of_node? See >>> device_set_of_node_from_dev() >> It might be needed for FastRPC as they are following sub node approach, Iris >> does not need. > Wouldn't it save you from passing it to of_dma_configure_id()? Iris will pass parent device of_node, setting parent device is enough. >>>> + >>>> + dev_set_name(dev, "%s", name); >>>> + dev_set_drvdata(dev, (void *)f_id); >>>> + >>>> + ret = device_register(dev); >>>> + if (ret) { >>>> + put_device(dev); >>>> + return ERR_PTR(ret); >>>> + } >>>> + >>>> + return dev; >>>> +} >>>> diff --git a/drivers/media/platform/qcom/iris/iris_resources.h b/drivers/media/platform/qcom/iris/iris_resources.h >>>> index 6bfbd2dc6db0..4a494627ff23 100644 >>>> --- a/drivers/media/platform/qcom/iris/iris_resources.h >>>> +++ b/drivers/media/platform/qcom/iris/iris_resources.h >>>> @@ -15,5 +15,6 @@ int iris_unset_icc_bw(struct iris_core *core); >>>> int iris_set_icc_bw(struct iris_core *core, unsigned long icc_bw); >>>> int iris_disable_unprepare_clock(struct iris_core *core, enum platform_clk_type clk_type); >>>> int iris_prepare_enable_clock(struct iris_core *core, enum platform_clk_type clk_type); >>>> +struct device *iris_create_cb_dev(struct iris_core *core, const char *name, const u32 *f_id); >>>> #endif >>>> >>>> -- >>>> 2.34.1 >>>>