Add support for the video clock controller for video clients to
be able to request for the clocks on QCS615 platform.

Signed-off-by: Taniya Das <quic_tdas@quicinc.com>
---
 drivers/clk/qcom/Kconfig          |   8 +
 drivers/clk/qcom/Makefile         |   1 +
 drivers/clk/qcom/videocc-qcs615.c | 332 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 341 insertions(+)

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index ed610310699696f92b4a5938635e7b2ab757358c..7ef2037b3b0dd01fec0c6be8b6030ebaab182117 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -494,6 +494,14 @@ config QCS_GPUCC_615
 	  Say Y if you want to support graphics controller devices and
 	  functionality such as 3D graphics.
 
+config QCS_VIDEOCC_615
+	tristate "QCS615 Video Clock Controller"
+	select QCS_GCC_615
+	help
+	  Support for the video clock controller on QCS615 devices.
+	  Say Y if you want to support video devices and functionality such as
+	  video encode and decode.
+
 config SC_CAMCC_7180
 	tristate "SC7180 Camera Clock Controller"
 	depends on ARM64 || COMPILE_TEST
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index a45b6fa28c1d04fd42dcde6e6f22378baa7c8e60..b024e75e49435a3d2f449bbdb9c2cef8e7958eca 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -73,6 +73,7 @@ obj-$(CONFIG_QCS_DISPCC_615) += dispcc-qcs615.o
 obj-$(CONFIG_QCS_CAMCC_615) += camcc-qcs615.o
 obj-$(CONFIG_QCS_GCC_404) += gcc-qcs404.o
 obj-$(CONFIG_QCS_GPUCC_615) += gpucc-qcs615.o
+obj-$(CONFIG_QCS_VIDEOCC_615) += videocc-qcs615.o
 obj-$(CONFIG_QCS_Q6SSTOP_404) += q6sstop-qcs404.o
 obj-$(CONFIG_QCS_TURING_404) += turingcc-qcs404.o
 obj-$(CONFIG_QDU_ECPRICC_1000) += ecpricc-qdu1000.o
diff --git a/drivers/clk/qcom/videocc-qcs615.c b/drivers/clk/qcom/videocc-qcs615.c
new file mode 100644
index 0000000000000000000000000000000000000000..14704185d9fa2548ade7dd60f4f9f5d378bb0938
--- /dev/null
+++ b/drivers/clk/qcom/videocc-qcs615.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,qcs615-videocc.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-pll.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "clk-regmap-divider.h"
+#include "clk-regmap-mux.h"
+#include "common.h"
+#include "gdsc.h"
+#include "reset.h"
+
+enum {
+	DT_BI_TCXO,
+	DT_SLEEP_CLK,
+};
+
+enum {
+	P_BI_TCXO,
+	P_SLEEP_CLK,
+	P_VIDEO_PLL0_OUT_AUX,
+	P_VIDEO_PLL0_OUT_AUX2,
+	P_VIDEO_PLL0_OUT_MAIN,
+};
+
+static const struct pll_vco video_cc_pll0_vco[] = {
+	{ 500000000, 1000000000, 2 },
+};
+
+/* 600MHz configuration VCO - 2 */
+static struct alpha_pll_config video_pll0_config = {
+	.l = 0x1f,
+	.alpha_hi = 0x40,
+	.alpha = 0x00,
+	.alpha_en_mask = BIT(24),
+	.vco_val = BIT(21),
+	.vco_mask = GENMASK(21, 20),
+	.main_output_mask = BIT(0),
+	.config_ctl_val = 0x4001055b,
+	.test_ctl_hi_val = 0x1,
+	.test_ctl_hi_mask = 0x1,
+};
+
+static struct clk_alpha_pll video_pll0 = {
+	.offset = 0x42c,
+	.vco_table = video_cc_pll0_vco,
+	.num_vco = ARRAY_SIZE(video_cc_pll0_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.clkr = {
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_pll0",
+			.parent_data = &(const struct clk_parent_data) {
+				.index = DT_BI_TCXO,
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_slew_ops,
+		},
+	},
+};
+
+static const struct parent_map video_cc_parent_map_0[] = {
+	{ P_SLEEP_CLK, 0 },
+};
+
+static const struct clk_parent_data video_cc_parent_data_0_ao[] = {
+	{ .index = DT_SLEEP_CLK },
+};
+
+static const struct parent_map video_cc_parent_map_1[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_VIDEO_PLL0_OUT_MAIN, 1 },
+	{ P_VIDEO_PLL0_OUT_AUX, 2 },
+	{ P_VIDEO_PLL0_OUT_AUX2, 3 },
+};
+
+static const struct clk_parent_data video_cc_parent_data_1[] = {
+	{ .index = DT_BI_TCXO },
+	{ .hw = &video_pll0.clkr.hw },
+	{ .hw = &video_pll0.clkr.hw },
+	{ .hw = &video_pll0.clkr.hw },
+};
+
+static const struct freq_tbl ftbl_video_cc_sleep_clk_src[] = {
+	F(32000, P_SLEEP_CLK, 1, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 video_cc_sleep_clk_src = {
+	.cmd_rcgr = 0xaf8,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = video_cc_parent_map_0,
+	.freq_tbl = ftbl_video_cc_sleep_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_sleep_clk_src",
+		.parent_data = video_cc_parent_data_0_ao,
+		.num_parents = ARRAY_SIZE(video_cc_parent_data_0_ao),
+		.ops = &clk_rcg2_ops,
+	},
+};
+
+static const struct freq_tbl ftbl_video_cc_venus_clk_src[] = {
+	F(19200000, P_BI_TCXO, 1, 0, 0),
+	F(133333333, P_VIDEO_PLL0_OUT_MAIN, 4.5, 0, 0),
+	F(240000000, P_VIDEO_PLL0_OUT_MAIN, 2.5, 0, 0),
+	F(300000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
+	F(380000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
+	F(410000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
+	F(460000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 video_cc_venus_clk_src = {
+	.cmd_rcgr = 0x7f0,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = video_cc_parent_map_1,
+	.freq_tbl = ftbl_video_cc_venus_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "video_cc_venus_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_branch video_cc_sleep_clk = {
+	.halt_reg = 0xb18,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0xb18,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_sleep_clk",
+			.parent_data = &(const struct clk_parent_data){
+				.hw = &video_cc_sleep_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_vcodec0_axi_clk = {
+	.halt_reg = 0x8f0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x8f0,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_vcodec0_axi_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_vcodec0_core_clk = {
+	.halt_reg = 0x890,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x890,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_vcodec0_core_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_venus_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_venus_ahb_clk = {
+	.halt_reg = 0x9b0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x9b0,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_venus_ahb_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_venus_ctl_axi_clk = {
+	.halt_reg = 0x8d0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x8d0,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_venus_ctl_axi_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_venus_ctl_core_clk = {
+	.halt_reg = 0x850,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x850,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "video_cc_venus_ctl_core_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&video_cc_venus_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc vcodec0_gdsc = {
+	.gdscr = 0x874,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "vcodec0_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = HW_CTRL_TRIGGER | POLL_CFG_GDSCR,
+};
+
+static struct gdsc venus_gdsc = {
+	.gdscr = 0x814,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0x6,
+	.pd = {
+		.name = "venus_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = POLL_CFG_GDSCR,
+};
+
+static struct clk_regmap *video_cc_qcs615_clocks[] = {
+	[VIDEO_CC_SLEEP_CLK] = &video_cc_sleep_clk.clkr,
+	[VIDEO_CC_SLEEP_CLK_SRC] = &video_cc_sleep_clk_src.clkr,
+	[VIDEO_CC_VCODEC0_AXI_CLK] = &video_cc_vcodec0_axi_clk.clkr,
+	[VIDEO_CC_VCODEC0_CORE_CLK] = &video_cc_vcodec0_core_clk.clkr,
+	[VIDEO_CC_VENUS_AHB_CLK] = &video_cc_venus_ahb_clk.clkr,
+	[VIDEO_CC_VENUS_CLK_SRC] = &video_cc_venus_clk_src.clkr,
+	[VIDEO_CC_VENUS_CTL_AXI_CLK] = &video_cc_venus_ctl_axi_clk.clkr,
+	[VIDEO_CC_VENUS_CTL_CORE_CLK] = &video_cc_venus_ctl_core_clk.clkr,
+	[VIDEO_PLL0] = &video_pll0.clkr,
+};
+
+static struct gdsc *video_cc_qcs615_gdscs[] = {
+	[VCODEC0_GDSC] = &vcodec0_gdsc,
+	[VENUS_GDSC] = &venus_gdsc,
+};
+
+static const struct qcom_reset_map video_cc_qcs615_resets[] = {
+	[VIDEO_CC_INTERFACE_BCR] = { 0x8b0 },
+	[VIDEO_CC_VCODEC0_BCR] = { 0x870 },
+	[VIDEO_CC_VENUS_BCR] = { 0x810 },
+};
+
+static const struct regmap_config video_cc_qcs615_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0xb94,
+	.fast_io = true,
+};
+
+static const struct qcom_cc_desc video_cc_qcs615_desc = {
+	.config = &video_cc_qcs615_regmap_config,
+	.clks = video_cc_qcs615_clocks,
+	.num_clks = ARRAY_SIZE(video_cc_qcs615_clocks),
+	.resets = video_cc_qcs615_resets,
+	.num_resets = ARRAY_SIZE(video_cc_qcs615_resets),
+	.gdscs = video_cc_qcs615_gdscs,
+	.num_gdscs = ARRAY_SIZE(video_cc_qcs615_gdscs),
+};
+
+static const struct of_device_id video_cc_qcs615_match_table[] = {
+	{ .compatible = "qcom,qcs615-videocc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, video_cc_qcs615_match_table);
+
+static int video_cc_qcs615_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, &video_cc_qcs615_desc);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	clk_alpha_pll_configure(&video_pll0, regmap, &video_pll0_config);
+
+	/* Keep some clocks always enabled */
+	qcom_branch_set_clk_en(regmap, 0xab8); /* VIDEO_CC_XO_CLK */
+
+	return qcom_cc_really_probe(&pdev->dev, &video_cc_qcs615_desc, regmap);
+}
+
+static struct platform_driver video_cc_qcs615_driver = {
+	.probe = video_cc_qcs615_probe,
+	.driver = {
+		.name = "videocc-qcs615",
+		.of_match_table = video_cc_qcs615_match_table,
+	},
+};
+
+module_platform_driver(video_cc_qcs615_driver);
+
+MODULE_DESCRIPTION("QTI VIDEOCC QCS615 Driver");
+MODULE_LICENSE("GPL");

-- 
2.45.2

On 08/11/2024 04:09, Taniya Das wrote:
> +static struct gdsc vcodec0_gdsc = {
> +	.gdscr = 0x874,
> +	.en_rest_wait_val = 0x2,
> +	.en_few_wait_val = 0x2,
> +	.clk_dis_wait_val = 0x6,
> +	.pd = {
> +		.name = "vcodec0_gdsc",
> +	},
> +	.pwrsts = PWRSTS_OFF_ON,
> +	.flags = HW_CTRL_TRIGGER | POLL_CFG_GDSCR,
> +};
> +
> +static struct gdsc venus_gdsc = {
> +	.gdscr = 0x814,
> +	.en_rest_wait_val = 0x2,
> +	.en_few_wait_val = 0x2,
> +	.clk_dis_wait_val = 0x6,
> +	.pd = {
> +		.name = "venus_gdsc",
> +	},
> +	.pwrsts = PWRSTS_OFF_ON,
> +	.flags = POLL_CFG_GDSCR,
> +};
> +

This looks good to me, except; could you please check if venus gdsc 
should be the parent of vcodec0.

If so, please add it in, otherwise.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

On Fri, Nov 08, 2024 at 09:39:27AM +0530, Taniya Das wrote:
> Add support for the video clock controller for video clients to
> be able to request for the clocks on QCS615 platform.
> 
> Signed-off-by: Taniya Das <quic_tdas@quicinc.com>
> ---
>  drivers/clk/qcom/Kconfig          |   8 +
>  drivers/clk/qcom/Makefile         |   1 +
>  drivers/clk/qcom/videocc-qcs615.c | 332 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 341 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

-- 
With best wishes
Dmitry