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From:   Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Date:   Wed, 01 Nov 2023 10:54:31 +0000
Subject: [PATCH v3 1/5] media: qcom: camss: Flag which VFEs require a
 power-domain
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Message-Id: <20231101-b4-camss-named-power-domains-v3-1-bbdf5f22462a@linaro.org>
References: <20231101-b4-camss-named-power-domains-v3-0-bbdf5f22462a@linaro.org>
In-Reply-To: <20231101-b4-camss-named-power-domains-v3-0-bbdf5f22462a@linaro.org>
To:     hverkuil-cisco@xs4all.nl, laurent.pinchart@ideasonboard.com,
        Robert Foss <rfoss@kernel.org>,
        Todor Tomov <todor.too@gmail.com>,
        Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        matti.lehtimaki@gmail.com
Cc:     linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Precedence: bulk

At the moment we have some complex code for determining if a VFE requires a
power-domain attachment. Particularly discordant in this scheme is the
subtle reliance on VFE and VFE Lite declaration ordering in our resources.

VFE id is used to determine if a VFE is lite or not and consequently if a
VFE requires power-domain attachment. VFE Lite though is not a correct
delineation between power-domain and non power-domain state since early
SoCs have neither VFE Lite nor power-domains attached to VFEs.

Introduce has_pd to the VFE resource structure to allow the CAMSS code to
understand if it needs to try to attach a power-domain for a given VFE.

As a side-effect from this we no longer need to care about VFE Lite or
non-Lite or the id number associated with either and which order the
VFE/VFE Lite was declared in.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss.c | 8 ++++++++
 drivers/media/platform/qcom/camss/camss.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 8e78dd8d5961e..ed01a3ac7a38e 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -278,6 +278,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_7
 	},
 
@@ -298,6 +299,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_7
 	}
 };
@@ -468,6 +470,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_8
 	},
 
@@ -491,6 +494,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_8
 	}
 };
@@ -658,6 +662,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 4,
+		.has_pd = true,
 		.ops = &vfe_ops_170
 	},
 
@@ -680,6 +685,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 4,
+		.has_pd = true,
 		.ops = &vfe_ops_170
 	},
 
@@ -840,6 +846,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_480
 	},
 	/* VFE1 */
@@ -860,6 +867,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_480
 	},
 	/* VFE2 (lite) */
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 8acad7321c09d..b854cff1774d4 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -49,6 +49,7 @@ struct camss_subdev_resources {
 	char *reg[CAMSS_RES_MAX];
 	char *interrupt[CAMSS_RES_MAX];
 	u8 line_num;
+	bool has_pd;
 	const void *ops;
 };
 

-- 
2.42.0