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Mon, 27 Jul 2026 23:02:57 -0700 (PDT) X-Received: by 2002:a05:6a00:27a5:b0:846:169c:d81e with SMTP id d2e1a72fcca58-84e93320858mr932962b3a.56.1785218577131; Mon, 27 Jul 2026 23:02:57 -0700 (PDT) Received: from hu-sachinku-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84e533ce57asm3980421b3a.28.2026.07.27.23.02.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2026 23:02:56 -0700 (PDT) From: Sachin Kumar Garg Subject: [PATCH v8 0/3] media: qcom: iris: add multi slice support Date: Tue, 28 Jul 2026 11:32:43 +0530 Message-Id: <20260728-iris_multi_slice-v8-0-eb18f96f0ed8@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAARGaGoC/53S32rDIBQG8FcpuZ7F/8Yyxt5jlKLmuApJ02oaV krffSZhLNCEwW6Ec+Hv+OF3LxLEAKnYbe5FhD6k0J7yUL5sCnc0p09AocpzQTGVWBGJQgzp0Fz rLhxSHRwgIbmipTJaSFbka+cIPnyN5Mc+zz62DeqOEcwvxGn5DPUEEaSpY1RJosH69zal7eVqa tc2zTYfAx9OKMK5vqGu/X0XFQucQhhZzqRwXDPsYZE7htS18Tbm7+nw5p+oaoGkmdRCYEs8WKb tMzkk7tnMoWTBYdkxlZPEyFKBghWHzx224PDscOGxYR6Ud2uOmDt8wRGD463QrKLacr7iyL8cO eTSuiISO8upWXHU3Pnf1+0fU9UiXK65tN3Ut6KBlMxY2t3mdVqA9bgAmShw3U22ksbrquIV8fL Jfsv44xvINdsSGQMAAA== X-Change-ID: 20260716-iris_multi_slice-5647287a9563 In-Reply-To: <20260725-iris_multi_slice-v7-0-b4365c4930fe@oss.qualcomm.com> References: <20260725-iris_multi_slice-v7-0-b4365c4930fe@oss.qualcomm.com> To: Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab , Hans Verkuil , Vedang Nagar , Stefan Schmidt Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, 20260709-iris-ar50lt-v7-0-76af9dd4d1f6@oss.qualcomm.com, Sachin Kumar Garg , Vishnu Reddy X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1785218571; l=7398; i=sachin.garg@oss.qualcomm.com; s=20260211; h=from:subject:message-id; bh=uQ9yMGhz9mkg9ECVwNuYdfL9E+Zt5HjwkMYUwJ1/bM8=; b=y638GQ99ILsN+9iGyfJptjFW0KU57wr80c3Ggi4aLnU4IHD83Ot14QR3q15yF9UpFK5Bror47 Cgs1ZIx3GD2ChYICbvHaZ4veA5cPNIg/g8sDH+JKCvv4zhtXz6BD9is X-Developer-Key: i=sachin.garg@oss.qualcomm.com; a=ed25519; pk=KcRhp4CP9cR1V2tg6xSNRnB2STYaU0vVigdUF4Actu0= X-Proofpoint-ORIG-GUID: HfbWrXhq4q3K2-hXgt8K2D1vTuJ-qAfZ X-Proofpoint-GUID: HfbWrXhq4q3K2-hXgt8K2D1vTuJ-qAfZ X-Authority-Analysis: v=2.4 cv=Ns7htcdJ c=1 sm=1 tr=0 ts=6a684612 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=T8lcpxUem0FCnaQ_rB4A:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI4MDA1MyBTYWx0ZWRfX6tUXLR4K9Tn8 TCv6mho3IT9xctd8n/hYRoz+mtln5NUiY9FHq7yZceqNLNWlnbh+YcCG30E5AEZv3W1cviMCUYi Yt9MmkpyWVjKY7UWhgoCq++V3HEd0HadHWgJYRdah2DiDCIpn2GofDodRLMeHe8MwMBe07wTztC /bkrPgkjOB5wKh3DGrnEZ8ynEGMg2UnvO25A2SZUOYk0MZbDGig4kPi4BHYJ869ppV9VqH2nwDi FyMO6e+jsm02KwDsC/SKdEQInx5ex1aqYNjgkouncP3wj7gH5IDgvGY47/R1nAURAoMgh/1E86s OBlWttxybyyj619l3dVHSTIbllpPqbAIHI9oHVMYPZO07J5SQDGiQBZCOEFpd7i474BpieqGyAb Qi9Sqz4yRWRGHa77Wi+OCdEyXJ69C+mQytHnyvX0XVLlkxCD3GeGv8r6zDY+hbwQi68qXwbdiW8 YbOulNQisGFMSfGcogg== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI4MDA1MyBTYWx0ZWRfX54/An0eEW1Av yWL74zkcDEEG5eurlla8slvzzY5ORQ0MVttaQJ4FBuvVovpSspoYxX1eq0QgCaye7WTzo2Zk9mO WB4akowEREyLLgFrzyr4uP4NPMPyvp8= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-28_01,2026-07-27_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 impostorscore=0 phishscore=0 spamscore=0 clxscore=1015 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607280053 This series adds support for multi-slice encoding in the Qualcomm Iris driver. Multi-slice mode allows encoding a single frame into multiple slices, which can improve error resilience and enable parallel processing. The feature supports two slice modes: - MAX_MB mode: slices are created based on macroblock count, controlled via V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB - MAX_BYTES mode: slices are created based on byte size, controlled via V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES Clients can enable slice mode using the V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE control. Patch 1 is a prerequisite fix: iris_set_stage() computes a work_mode but never caches it back into inst->fw_caps[STAGE].value, leaving buffer-size and clock-frequency calculations based on a stale value. Patch 2 is another prerequisite fix: iris_set_stage() currently always selects STAGE_2 work mode for encoder sessions, but CBR rate control requires STAGE_1. This is fixed by forcing STAGE_1 when BITRATE_MODE is set to CBR. Patch 3 adds the multi-slice support itself for Iris HFI Gen2 based targets (qcm2290, sc7280, qcs8300, sm8550 and other SM8550-derived targets). Support for HFI Gen1 targets will be added in a follow-up series. This series has been verified with GST level testing. Command used: gst-launch-1.0 -v videotestsrc ! video/x-raw,format=NV12, \ width=1280,height=720,framerate=30/1 ! v4l2h264enc output-io-mode=4 | capture-io-mode=4 extra-controls="controls,video_bitrate_mode=1, \ slice_partitioning_method=1,number_of_mbs_in_a_slice=460;" \ ! filesink location=/opt/test_enc.h264 Depends-on: message-id: 20260709-iris-ar50lt-v7-0-76af9dd4d1f6@oss.qualcomm.com Changes in v8: - Rebased on top of AR50_LT enablement series (https://lore.kernel.org/all/20260709-iris-ar50lt-v7-0-76af9dd4d1f6@oss.qualcomm.com/) - Extend multi-slice support to VPU2 (sc7280) and AR50LT (qcm2290) platforms, in addition to the existing VPU3x platforms. - Rename the shared slice_caps instance from slice_caps_vpu3x to iris_vpu2_vpu3x_slice_caps to reflect that it is now shared across VPU2 and VPU3x platforms, and wire it into sc7280_data. - Add a new iris_ar50lt_slice_caps instance for the AR50LT platform, and wire it into qcm2290_data. - Link to v7: https://lore.kernel.org/r/20260725-iris_multi_slice-v7-0-b4365c4930fe@oss.qualcomm.com Changes in v7: - Moved slice_caps_vpu3x from a static const in iris_platform_vpu3x.c to a real definition in iris_hfi_gen2.c, extern-declared in iris_platform_common.h (same pattern as iris_hfi_gen2_data), so it no longer has to sit between #include lines to satisfy ordering. - Link to v6: https://lore.kernel.org/r/20260724-iris_multi_slice-v6-0-a99d160cb42a@oss.qualcomm.com Changes in v6: - Reordered local variable declarations in iris_set_slice_count() to follow reverse Christmas tree style. - Renamed default_slice_caps_vpu3x to slice_caps_vpu3x. - Link to v5: https://lore.kernel.org/r/20260724-iris_multi_slice-v5-0-4fb593d29b44@oss.qualcomm.com Changes in v5: - Fixed unbounded slice count under RC_OFF in iris_set_slice_count() for the MAX_BYTES use case. - Addressed remaining coding-style review comments. - Link to v4: https://lore.kernel.org/r/20260723-iris_multi_slice-v4-0-45f0a3fe7fce@oss.qualcomm.com Changes in v4: - Split out a new prerequisite patch (patch 1) to cache the computed work_mode into inst->fw_caps[STAGE].value in iris_set_stage(), since this fixes a pre-existing bug independent of the CBR change and needed its own Fixes tag. - Deduplicated the per-target slice capability limits that were previously repeated identically across platform_inst_cap_qcs8300 and platform_inst_cap_sm8550. Introduced struct platform_inst_slice_caps and moved it to iris_platform_data (one level up from platform_inst_caps), since all Iris HFI Gen2 targets share the same encoder capability table and hence the same slice limits; a single default_slice_caps_vpu3x instance is now referenced by all Gen2 platforms. - Link to v3: https://lore.kernel.org/r/20260721-iris_multi_slice-v3-0-adc61a687e7e@oss.qualcomm.com hanges in v3: - Patch 1 (force stage 1 work mode for CBR RC): cache the computed work_mode into inst->fw_caps[STAGE].value so buffer-size and clock-frequency calculations stay consistent with what is actually configured on firmware. - Patch 2 (multi-slice support): - Use inst->hfi_rc_type instead of the raw V4L2 BITRATE_MODE value when validating/deriving slice parameters, avoiding a mismatch between V4L2 and firmware rate-control enums. - Round up (instead of truncate) when computing the minimum MAX_MB and MAX_BYTES slice size floors, so the hardware's max-slices-per-frame limit is never exceeded. Changes in v2: - Added a prerequisite patch to force STAGE_1 work mode for CBR rate control on the encoder, required for multi-slice encoding to work correctly. - Addressed review comments on the multi-slice patch (updated commit subject and description). Signed-off-by: Sachin Kumar Garg --- Sachin Kumar Garg (3): media: iris: cache work mode after computing it in iris_set_stage media: iris: force stage 1 work mode for CBR RC on encoder media: iris: add support for multi_slice in iris encoder drivers/media/platform/qcom/iris/iris_ctrls.c | 91 ++++++++++++++++++++++ drivers/media/platform/qcom/iris/iris_ctrls.h | 1 + drivers/media/platform/qcom/iris/iris_hfi_gen2.c | 86 ++++++++++++++++++++ .../platform/qcom/iris/iris_hfi_gen2_defines.h | 2 + .../platform/qcom/iris/iris_platform_common.h | 18 +++++ .../media/platform/qcom/iris/iris_platform_vpu2.c | 1 + .../media/platform/qcom/iris/iris_platform_vpu3x.c | 5 ++ .../platform/qcom/iris/iris_platform_vpu_ar50lt.c | 1 + 8 files changed, 205 insertions(+) --- base-commit: 2ba8bf550753c4ca46c708a5038a6e1690762d0f change-id: 20260716-iris_multi_slice-5647287a9563 prerequisite-message-id: <20260709-iris-ar50lt-v7-0-76af9dd4d1f6@oss.qualcomm.com> prerequisite-patch-id: 8b5a1be5778fb4c7feb069452ecb60e8b8dfc3f8 prerequisite-patch-id: e669517302297a7b315c9aa4f4189e4928091e0c prerequisite-patch-id: 922bc325dbd9a499a3a209d2f8dbbce6a4166e60 prerequisite-patch-id: a5a49cda4e21d835558fa84f2f6bd25b8f7e72b4 prerequisite-patch-id: e62e8285bcbddade64c026379f23a8c5ae70fe52 prerequisite-patch-id: cac29b25348e2e791638a0286283109f2546f9a7 prerequisite-patch-id: 4dfaff2f9644d7a168b1b35fe947660b8f464af6 prerequisite-patch-id: a26fa49eefecf2b5ba6cf964be9327eb5ba5929a prerequisite-patch-id: d97c79463fe1487fa7bc9eebd4cfb4610713f44a prerequisite-patch-id: 76eafea8230160a3b5e6503c68a5c9c3c2d1497e prerequisite-patch-id: ea9cd9a8e6561321cd9cf338a76da1382ff47e13 prerequisite-patch-id: 26e9083b709cc8f2f1184edf6b39fb89f365a9f1 prerequisite-patch-id: ce4576bd3d20880939a97a1cda9bb8678808ea65 prerequisite-patch-id: 8c94bec467b385c373bd98eb9ee5a5805fc4e6a6 prerequisite-patch-id: 6e258cd475b77927d6476704cbf91bf48a63aa0d prerequisite-patch-id: 54c8855d0721ba8667d095e6ad6556c2021f89e9 prerequisite-patch-id: f5479d2ca6b850c0c750944a8e0b05a7df2cc5a8 prerequisite-patch-id: 96dfec1c2df69f748c1a4bd741628e946cb7bec1 Best regards, -- Sachin Kumar Garg