linux-kernel - [PATCH 08/11] media: iris: don't specify max

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Message-Id: <20260110-iris-ubwc-v1-8-dd70494dcd7b@oss.qualcomm.com>
Date: Sat, 10 Jan 2026 21:38:00 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Akhil P Oommen <akhilpo@....qualcomm.com>,
        Vikash Garodia <vikash.garodia@....qualcomm.com>,
        Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Bryan O'Donoghue <bod@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-media@...r.kernel.org
Subject: [PATCH 08/11] media: iris: don't specify max_channels in the
 source code

The UBWC max_channels spreading is specified in the Iris driver, but it
also can be calculated from the platform UBWC config. Use the platform
UBWC configuration instead of specifying it directly in the source.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 drivers/media/platform/qcom/iris/iris_hfi_gen2_packet.c | 2 +-
 drivers/media/platform/qcom/iris/iris_platform_common.h | 1 -
 drivers/media/platform/qcom/iris/iris_platform_gen2.c   | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_packet.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_packet.c
index 9945c939cd29..91dbea4c6664 100644
--- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_packet.c
+++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_packet.c
@@ -139,7 +139,7 @@ void iris_hfi_gen2_packet_sys_init(struct iris_core *core, struct iris_hfi_heade
 				    &payload,
 				    sizeof(u32));
 
-	payload = core->iris_platform_data->ubwc_config->max_channels;
+	payload = ubwc->macrotile_mode ? 8 : 4;
 	iris_hfi_gen2_create_packet(hdr,
 				    HFI_PROP_UBWC_MAX_CHANNELS,
 				    HFI_HOST_FLAGS_NONE,
diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
index f99fcbb8fced..4abaf4615cea 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_common.h
+++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
@@ -72,7 +72,6 @@ struct tz_cp_config {
 };
 
 struct ubwc_config_data {
-	u32	max_channels;
 };
 
 struct platform_inst_caps {
diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen2.c b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
index c967db452dec..e78cda7e307d 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_gen2.c
+++ b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
@@ -632,7 +632,6 @@ static const struct platform_clk_data sm8550_clk_table[] = {
 };
 
 static struct ubwc_config_data ubwc_config_sm8550 = {
-	.max_channels = 8,
 };
 
 static struct tz_cp_config tz_cp_config_sm8550 = {

-- 
2.47.3