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From:   Taniya Das <quic_tdas@quicinc.com>
To:     Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>
CC:     Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Taniya Das <quic_tdas@quicinc.com>,
        <linux-arm-msm@vger.kernel.org>, <linux-clk@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <quic_skakitap@quicinc.com>, <quic_jkona@quicinc.com>
Subject: [PATCH V4 2/3] clk: qcom: videocc-sm8450: Add video clock controller driver for SM8450
Date:   Tue, 9 May 2023 22:51:47 +0530
Message-ID: <20230509172148.7627-3-quic_tdas@quicinc.com>
In-Reply-To: <20230509172148.7627-1-quic_tdas@quicinc.com>
References: <20230509172148.7627-1-quic_tdas@quicinc.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Add support for the video clock controller driver for peripheral clock
clients to be able to request for video cc clocks.

Signed-off-by: Taniya Das <quic_tdas@quicinc.com>
---
Changes since V3:
 - Use lower case hex.
 - Check the return value here and bail out early on failure in probe.

Changes since V2:
 - Update the header file name to match the latest upstream header
   files.

Changes since V1:
 - Use DT indices instead of fw_name.
 - Replace pm_runtime_enable with devm_pm_runtime_enable.
 - Change license to GPL from GPL V2.

 drivers/clk/qcom/Kconfig          |   9 +
 drivers/clk/qcom/Makefile         |   1 +
 drivers/clk/qcom/videocc-sm8450.c | 461 ++++++++++++++++++++++++++++++
 3 files changed, 471 insertions(+)
 create mode 100644 drivers/clk/qcom/videocc-sm8450.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 12be3e2371b3..927aa5983464 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -962,4 +962,13 @@ config CLK_GFM_LPASS_SM8250
 	  Support for the Glitch Free Mux (GFM) Low power audio
           subsystem (LPASS) clocks found on SM8250 SoCs.

+config SM_VIDEOCC_8450
+	tristate "SM8450 Video Clock Controller"
+	select SM_GCC_8450
+	select QCOM_GDSC
+	help
+	  Support for the video clock controller on Qualcomm Technologies, Inc.
+	  SM8450 devices.
+	  Say Y if you want to support video devices and functionality such as
+	  video encode/decode.
 endif
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 9ff4c373ad95..1960ad8e8713 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -127,6 +127,7 @@ obj-$(CONFIG_SM_GPUCC_8350) += gpucc-sm8350.o
 obj-$(CONFIG_SM_TCSRCC_8550) += tcsrcc-sm8550.o
 obj-$(CONFIG_SM_VIDEOCC_8150) += videocc-sm8150.o
 obj-$(CONFIG_SM_VIDEOCC_8250) += videocc-sm8250.o
+obj-$(CONFIG_SM_VIDEOCC_8450) += videocc-sm8450.o
 obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
 obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
 obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
diff --git a/drivers/clk/qcom/videocc-sm8450.c b/drivers/clk/qcom/videocc-sm8450.c
new file mode 100644
index 000000000000..b6d25cc6956b
--- /dev/null
+++ b/drivers/clk/qcom/videocc-sm8450.c
@@ -0,0 +1,461 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,sm8450-videocc.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "clk-regmap-divider.h"
+#include "common.h"
+#include "gdsc.h"
+#include "reset.h"
+
+enum {
+	DT_BI_TCXO,
+};
+
+enum {
+	P_BI_TCXO,
+	P_VIDEO_CC_PLL0_OUT_MAIN,
+	P_VIDEO_CC_PLL1_OUT_MAIN,
+};
+
+static const struct pll_vco lucid_evo_vco[] = {
+	{ 249600000, 2020000000, 0 },
+};
+
+static const struct alpha_pll_config video_cc_pll0_config = {
+	.l = 0x1e,
+	.alpha = 0x0,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00182261,
+	.config_ctl_hi1_val = 0x32aa299c,
+	.user_ctl_val = 0x00000000,
+	.user_ctl_hi_val = 0x00000805,
+};
+
+static struct clk_alpha_pll video_cc_pll0 = {
+	.offset = 0x0,
+	.vco_table = lucid_evo_vco,
+	.num_vco = ARRAY_SIZE(lucid_evo_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID_EVO],
+	.clkr = {
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_pll0",
+			.parent_data = &(const struct clk_parent_data) {
+				.index = DT_BI_TCXO,
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_evo_ops,
+		},
+	},
+};
+
+static const struct alpha_pll_config video_cc_pll1_config = {
+	.l = 0x2b,
+	.alpha = 0xc000,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00182261,
+	.config_ctl_hi1_val = 0x32aa299c,
+	.user_ctl_val = 0x00000000,
+	.user_ctl_hi_val = 0x00000805,
+};
+
+static struct clk_alpha_pll video_cc_pll1 = {
+	.offset = 0x1000,
+	.vco_table = lucid_evo_vco,
+	.num_vco = ARRAY_SIZE(lucid_evo_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID_EVO],
+	.clkr = {
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_pll1",
+			.parent_data = &(const struct clk_parent_data) {
+				.index = DT_BI_TCXO,
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_evo_ops,
+		},
+	},
+};
+
+static const struct parent_map video_cc_parent_map_0[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_VIDEO_CC_PLL0_OUT_MAIN, 1 },
+};
+
+static const struct clk_parent_data video_cc_parent_data_0[] = {
+	{ .index = DT_BI_TCXO },
+	{ .hw = &video_cc_pll0.clkr.hw },
+};
+
+static const struct parent_map video_cc_parent_map_1[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_VIDEO_CC_PLL1_OUT_MAIN, 1 },
+};
+
+static const struct clk_parent_data video_cc_parent_data_1[] = {
+	{ .index = DT_BI_TCXO },
+	{ .hw = &video_cc_pll1.clkr.hw },
+};
+
+static const struct freq_tbl ftbl_video_cc_mvs0_clk_src[] = {
+	F(576000000, P_VIDEO_CC_PLL0_OUT_MAIN, 1, 0, 0),
+	F(720000000, P_VIDEO_CC_PLL0_OUT_MAIN, 1, 0, 0),
+	F(1014000000, P_VIDEO_CC_PLL0_OUT_MAIN, 1, 0, 0),
+	F(1098000000, P_VIDEO_CC_PLL0_OUT_MAIN, 1, 0, 0),
+	F(1332000000, P_VIDEO_CC_PLL0_OUT_MAIN, 1, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 video_cc_mvs0_clk_src = {
+	.cmd_rcgr = 0x8000,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = video_cc_parent_map_0,
+	.freq_tbl = ftbl_video_cc_mvs0_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs0_clk_src",
+		.parent_data = video_cc_parent_data_0,
+		.num_parents = ARRAY_SIZE(video_cc_parent_data_0),
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static const struct freq_tbl ftbl_video_cc_mvs1_clk_src[] = {
+	F(840000000, P_VIDEO_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	F(1050000000, P_VIDEO_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	F(1350000000, P_VIDEO_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	F(1500000000, P_VIDEO_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	F(1650000000, P_VIDEO_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 video_cc_mvs1_clk_src = {
+	.cmd_rcgr = 0x8018,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = video_cc_parent_map_1,
+	.freq_tbl = ftbl_video_cc_mvs1_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs1_clk_src",
+		.parent_data = video_cc_parent_data_1,
+		.num_parents = ARRAY_SIZE(video_cc_parent_data_1),
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static struct clk_regmap_div video_cc_mvs0_div_clk_src = {
+	.reg = 0x80b8,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs0_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]) {
+			&video_cc_mvs0_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_regmap_div video_cc_mvs0c_div2_div_clk_src = {
+	.reg = 0x806c,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs0c_div2_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]) {
+			&video_cc_mvs0_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_regmap_div video_cc_mvs1_div_clk_src = {
+	.reg = 0x80dc,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs1_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]) {
+			&video_cc_mvs1_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_regmap_div video_cc_mvs1c_div2_div_clk_src = {
+	.reg = 0x8094,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_mvs1c_div2_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]) {
+			&video_cc_mvs1_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_branch video_cc_mvs0_clk = {
+	.halt_reg = 0x80b0,
+	.halt_check = BRANCH_HALT_SKIP,
+	.hwcg_reg = 0x80b0,
+	.hwcg_bit = 1,
+	.clkr = {
+		.enable_reg = 0x80b0,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_mvs0_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_mvs0_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_mvs0c_clk = {
+	.halt_reg = 0x8064,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x8064,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_mvs0c_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_mvs0c_div2_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_mvs1_clk = {
+	.halt_reg = 0x80d4,
+	.halt_check = BRANCH_HALT_SKIP,
+	.hwcg_reg = 0x80d4,
+	.hwcg_bit = 1,
+	.clkr = {
+		.enable_reg = 0x80d4,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_mvs1_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_mvs1_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_mvs1c_clk = {
+	.halt_reg = 0x808c,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x808c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_mvs1c_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_mvs1c_div2_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc video_cc_mvs0c_gdsc = {
+	.gdscr = 0x804c,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "video_cc_mvs0c_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = RETAIN_FF_ENABLE,
+};
+
+static struct gdsc video_cc_mvs0_gdsc = {
+	.gdscr = 0x809c,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "video_cc_mvs0_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.parent = &video_cc_mvs0c_gdsc.pd,
+	.flags = RETAIN_FF_ENABLE | HW_CTRL,
+};
+
+static struct gdsc video_cc_mvs1c_gdsc = {
+	.gdscr = 0x8074,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "video_cc_mvs1c_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = RETAIN_FF_ENABLE,
+};
+
+static struct gdsc video_cc_mvs1_gdsc = {
+	.gdscr = 0x80c0,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "video_cc_mvs1_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.parent = &video_cc_mvs1c_gdsc.pd,
+	.flags = RETAIN_FF_ENABLE | HW_CTRL,
+};
+
+static struct clk_regmap *video_cc_sm8450_clocks[] = {
+	[VIDEO_CC_MVS0_CLK] = &video_cc_mvs0_clk.clkr,
+	[VIDEO_CC_MVS0_CLK_SRC] = &video_cc_mvs0_clk_src.clkr,
+	[VIDEO_CC_MVS0_DIV_CLK_SRC] = &video_cc_mvs0_div_clk_src.clkr,
+	[VIDEO_CC_MVS0C_CLK] = &video_cc_mvs0c_clk.clkr,
+	[VIDEO_CC_MVS0C_DIV2_DIV_CLK_SRC] = &video_cc_mvs0c_div2_div_clk_src.clkr,
+	[VIDEO_CC_MVS1_CLK] = &video_cc_mvs1_clk.clkr,
+	[VIDEO_CC_MVS1_CLK_SRC] = &video_cc_mvs1_clk_src.clkr,
+	[VIDEO_CC_MVS1_DIV_CLK_SRC] = &video_cc_mvs1_div_clk_src.clkr,
+	[VIDEO_CC_MVS1C_CLK] = &video_cc_mvs1c_clk.clkr,
+	[VIDEO_CC_MVS1C_DIV2_DIV_CLK_SRC] = &video_cc_mvs1c_div2_div_clk_src.clkr,
+	[VIDEO_CC_PLL0] = &video_cc_pll0.clkr,
+	[VIDEO_CC_PLL1] = &video_cc_pll1.clkr,
+};
+
+static struct gdsc *video_cc_sm8450_gdscs[] = {
+	[VIDEO_CC_MVS0C_GDSC] = &video_cc_mvs0c_gdsc,
+	[VIDEO_CC_MVS0_GDSC] = &video_cc_mvs0_gdsc,
+	[VIDEO_CC_MVS1C_GDSC] = &video_cc_mvs1c_gdsc,
+	[VIDEO_CC_MVS1_GDSC] = &video_cc_mvs1_gdsc,
+};
+
+static const struct qcom_reset_map video_cc_sm8450_resets[] = {
+	[CVP_VIDEO_CC_INTERFACE_BCR] = { 0x80e0 },
+	[CVP_VIDEO_CC_MVS0_BCR] = { 0x8098 },
+	[CVP_VIDEO_CC_MVS0C_BCR] = { 0x8048 },
+	[CVP_VIDEO_CC_MVS1_BCR] = { 0x80bc },
+	[CVP_VIDEO_CC_MVS1C_BCR] = { 0x8070 },
+	[VIDEO_CC_MVS0C_CLK_ARES] = { 0x8064, 2 },
+	[VIDEO_CC_MVS1C_CLK_ARES] = { 0x808c, 2 },
+};
+
+static const struct regmap_config video_cc_sm8450_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x9f4c,
+	.fast_io = true,
+};
+
+static struct qcom_cc_desc video_cc_sm8450_desc = {
+	.config = &video_cc_sm8450_regmap_config,
+	.clks = video_cc_sm8450_clocks,
+	.num_clks = ARRAY_SIZE(video_cc_sm8450_clocks),
+	.resets = video_cc_sm8450_resets,
+	.num_resets = ARRAY_SIZE(video_cc_sm8450_resets),
+	.gdscs = video_cc_sm8450_gdscs,
+	.num_gdscs = ARRAY_SIZE(video_cc_sm8450_gdscs),
+};
+
+static const struct of_device_id video_cc_sm8450_match_table[] = {
+	{ .compatible = "qcom,sm8450-videocc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, video_cc_sm8450_match_table);
+
+static int video_cc_sm8450_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap;
+	int ret;
+
+	ret = devm_pm_runtime_enable(&pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret)
+		return ret;
+
+	regmap = qcom_cc_map(pdev, &video_cc_sm8450_desc);
+	if (IS_ERR(regmap)) {
+		pm_runtime_put(&pdev->dev);
+		return PTR_ERR(regmap);
+	}
+
+	clk_lucid_evo_pll_configure(&video_cc_pll0, regmap, &video_cc_pll0_config);
+	clk_lucid_evo_pll_configure(&video_cc_pll1, regmap, &video_cc_pll1_config);
+
+	/*
+	 * Keep clocks always enabled:
+	 *	video_cc_ahb_clk
+	 *	video_cc_sleep_clk
+	 *	video_cc_xo_clk
+	 */
+	regmap_update_bits(regmap, 0x80e4, BIT(0), BIT(0));
+	regmap_update_bits(regmap, 0x8130, BIT(0), BIT(0));
+	regmap_update_bits(regmap, 0x8114, BIT(0), BIT(0));
+
+	ret = qcom_cc_really_probe(pdev, &video_cc_sm8450_desc, regmap);
+
+	pm_runtime_put(&pdev->dev);
+
+	return ret;
+}
+
+static struct platform_driver video_cc_sm8450_driver = {
+	.probe = video_cc_sm8450_probe,
+	.driver = {
+		.name = "video_cc-sm8450",
+		.of_match_table = video_cc_sm8450_match_table,
+	},
+};
+
+static int __init video_cc_sm8450_init(void)
+{
+	return platform_driver_register(&video_cc_sm8450_driver);
+}
+subsys_initcall(video_cc_sm8450_init);
+
+static void __exit video_cc_sm8450_exit(void)
+{
+	platform_driver_unregister(&video_cc_sm8450_driver);
+}
+module_exit(video_cc_sm8450_exit);
+
+MODULE_DESCRIPTION("QTI VIDEO_CC SM8450 Driver");
+MODULE_LICENSE("GPL");
--
2.17.1