linux-kernel - [PATCH RFC 1/6] soc: qcom: ubwc: Add config for Milos

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Message-Id: <20251219-milos-mdss-v1-1-4537a916bdf9@fairphone.com>
Date: Fri, 19 Dec 2025 17:41:07 +0100
From: Luca Weiss <luca.weiss@...rphone.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 <jessica.zhang@....qualcomm.com>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
 devicetree@...r.kernel.org, Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH RFC 1/6] soc: qcom: ubwc: Add config for Milos

Describe the Universal Bandwidth Compression (UBWC) configuration
for the Milos SoC.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
 drivers/soc/qcom/ubwc_config.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/soc/qcom/ubwc_config.c b/drivers/soc/qcom/ubwc_config.c
index 15d373bff231..790e67c7db3e 100644
--- a/drivers/soc/qcom/ubwc_config.c
+++ b/drivers/soc/qcom/ubwc_config.c
@@ -16,6 +16,17 @@ static const struct qcom_ubwc_cfg_data no_ubwc_data = {
 	/* no UBWC, no HBB */
 };
 
+static const struct qcom_ubwc_cfg_data milos_data = {
+	.ubwc_enc_version = UBWC_4_0,
+	.ubwc_dec_version = UBWC_4_0,
+	.ubwc_swizzle = UBWC_SWIZZLE_ENABLE_LVL2 |
+			UBWC_SWIZZLE_ENABLE_LVL3,
+	.ubwc_bank_spread = true,
+	/* TODO: highest_bank_bit = 14 for LP_DDR4 */
+	.highest_bank_bit = 15,
+	.macrotile_mode = true,
+};
+
 static const struct qcom_ubwc_cfg_data msm8937_data = {
 	.ubwc_enc_version = UBWC_1_0,
 	.ubwc_dec_version = UBWC_1_0,
@@ -223,6 +234,7 @@ static const struct of_device_id qcom_ubwc_configs[] __maybe_unused = {
 	{ .compatible = "qcom,apq8026", .data = &no_ubwc_data },
 	{ .compatible = "qcom,apq8074", .data = &no_ubwc_data },
 	{ .compatible = "qcom,apq8096", .data = &msm8998_data },
+	{ .compatible = "qcom,milos", .data = &milos_data },
 	{ .compatible = "qcom,msm8226", .data = &no_ubwc_data },
 	{ .compatible = "qcom,msm8916", .data = &no_ubwc_data },
 	{ .compatible = "qcom,msm8917", .data = &no_ubwc_data },

-- 
2.52.0