clk: qcom: Add video clock controller driver for SDM845

Add support for the video clock controller found on SDM845
based devices. This would allow video drivers to probe and
control their clocks.
Signed-off-by: NAmit Nischal <anischal@codeaurora.org>
Signed-off-by: NStephen Boyd <sboyd@kernel.org>

drivers/clk/qcom/Kconfig

@@ -227,6 +227,17 @@ config SDM_GCC_845
 	  Say Y if you want to use peripheral devices such as UART, SPI,
 	  I2C, USB, UFS, SDDC, PCIe, etc.
 
+config SDM_VIDEOCC_845
+	tristate "SDM845 Video Clock Controller"
+	depends on COMMON_CLK_QCOM
+	select SDM_GCC_845
+	select QCOM_GDSC
+	help
+	  Support for the video clock controller on Qualcomm Technologies, Inc
+	  SDM845 devices.
+	  Say Y if you want to support video devices and functionality such as
+	  video encode and decode.
+
 config SPMI_PMIC_CLKDIV
 	tristate "SPMI PMIC clkdiv Support"
 	depends on (COMMON_CLK_QCOM && SPMI) || COMPILE_TEST

drivers/clk/qcom/Makefile

@@ -38,4 +38,5 @@ obj-$(CONFIG_QCOM_CLK_APCS_MSM8916) += apcs-msm8916.o
 obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o
 obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o
 obj-$(CONFIG_SDM_GCC_845) += gcc-sdm845.o
+obj-$(CONFIG_SDM_VIDEOCC_845) += videocc-sdm845.o
 obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o

drivers/clk/qcom/videocc-sdm845.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,videocc-sdm845.h>
+
+#include "common.h"
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "clk-pll.h"
+#include "gdsc.h"
+
+#define F(f, s, h, m, n) { (f), (s), (2 * (h) - 1), (m), (n) }
+
+enum {
+	P_BI_TCXO,
+	P_CORE_BI_PLL_TEST_SE,
+	P_VIDEO_PLL0_OUT_EVEN,
+	P_VIDEO_PLL0_OUT_MAIN,
+	P_VIDEO_PLL0_OUT_ODD,
+};
+
+static const struct parent_map video_cc_parent_map_0[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_VIDEO_PLL0_OUT_MAIN, 1 },
+	{ P_VIDEO_PLL0_OUT_EVEN, 2 },
+	{ P_VIDEO_PLL0_OUT_ODD, 3 },
+	{ P_CORE_BI_PLL_TEST_SE, 4 },
+};
+
+static const char * const video_cc_parent_names_0[] = {
+	"bi_tcxo",
+	"video_pll0",
+	"video_pll0_out_even",
+	"video_pll0_out_odd",
+	"core_bi_pll_test_se",
+};
+
+static const struct alpha_pll_config video_pll0_config = {
+	.l = 0x10,
+	.alpha = 0xaaab,
+};
+
+static struct clk_alpha_pll video_pll0 = {
+	.offset = 0x42c,
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
+	.clkr = {
+		.hw.init = &(struct clk_init_data){
+			.name = "video_pll0",
+			.parent_names = (const char *[]){ "bi_tcxo" },
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_fabia_ops,
+		},
+	},
+};
+
+static const struct freq_tbl ftbl_video_cc_venus_clk_src[] = {
+	F(100000000, P_VIDEO_PLL0_OUT_MAIN, 4, 0, 0),
+	F(200000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
+	F(330000000, P_VIDEO_PLL0_OUT_MAIN, 1, 0, 0),
+	F(404000000, P_VIDEO_PLL0_OUT_MAIN, 1, 0, 0),
+	F(444000000, P_VIDEO_PLL0_OUT_MAIN, 1, 0, 0),
+	F(533000000, P_VIDEO_PLL0_OUT_MAIN, 1, 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_0,
+	.freq_tbl = ftbl_video_cc_venus_clk_src,
+	.clkr.hw.init = &(struct clk_init_data){
+		.name = "video_cc_venus_clk_src",
+		.parent_names = video_cc_parent_names_0,
+		.num_parents = 5,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static struct clk_branch video_cc_apb_clk = {
+	.halt_reg = 0x990,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x990,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_apb_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_at_clk = {
+	.halt_reg = 0x9f0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x9f0,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_at_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_qdss_trig_clk = {
+	.halt_reg = 0x970,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x970,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_qdss_trig_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_qdss_tsctr_div8_clk = {
+	.halt_reg = 0x9d0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x9d0,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_qdss_tsctr_div8_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_vcodec0_axi_clk = {
+	.halt_reg = 0x930,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x930,
+		.enable_mask = BIT(0),
+		.hw.init = &(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_VOTED,
+	.clkr = {
+		.enable_reg = 0x890,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_vcodec0_core_clk",
+			.parent_names = (const char *[]){
+				"video_cc_venus_clk_src",
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_vcodec1_axi_clk = {
+	.halt_reg = 0x950,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x950,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_vcodec1_axi_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch video_cc_vcodec1_core_clk = {
+	.halt_reg = 0x8d0,
+	.halt_check = BRANCH_VOTED,
+	.clkr = {
+		.enable_reg = 0x8d0,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "video_cc_vcodec1_core_clk",
+			.parent_names = (const char *[]){
+				"video_cc_venus_clk_src",
+			},
+			.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 = &(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 = 0x910,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x910,
+		.enable_mask = BIT(0),
+		.hw.init = &(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 = &(struct clk_init_data){
+			.name = "video_cc_venus_ctl_core_clk",
+			.parent_names = (const char *[]){
+				"video_cc_venus_clk_src",
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc venus_gdsc = {
+	.gdscr = 0x814,
+	.pd = {
+		.name = "venus_gdsc",
+	},
+	.cxcs = (unsigned int []){ 0x850, 0x910 },
+	.cxc_count = 2,
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = POLL_CFG_GDSCR,
+};
+
+static struct gdsc vcodec0_gdsc = {
+	.gdscr = 0x874,
+	.pd = {
+		.name = "vcodec0_gdsc",
+	},
+	.cxcs = (unsigned int []){ 0x890, 0x930 },
+	.cxc_count = 2,
+	.flags = HW_CTRL | POLL_CFG_GDSCR,
+	.pwrsts = PWRSTS_OFF_ON,
+};
+
+static struct gdsc vcodec1_gdsc = {
+	.gdscr = 0x8b4,
+	.pd = {
+		.name = "vcodec1_gdsc",
+	},
+	.cxcs = (unsigned int []){ 0x8d0, 0x950 },
+	.cxc_count = 2,
+	.flags = HW_CTRL | POLL_CFG_GDSCR,
+	.pwrsts = PWRSTS_OFF_ON,
+};
+
+static struct clk_regmap *video_cc_sdm845_clocks[] = {
+	[VIDEO_CC_APB_CLK] = &video_cc_apb_clk.clkr,
+	[VIDEO_CC_AT_CLK] = &video_cc_at_clk.clkr,
+	[VIDEO_CC_QDSS_TRIG_CLK] = &video_cc_qdss_trig_clk.clkr,
+	[VIDEO_CC_QDSS_TSCTR_DIV8_CLK] = &video_cc_qdss_tsctr_div8_clk.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_VCODEC1_AXI_CLK] = &video_cc_vcodec1_axi_clk.clkr,
+	[VIDEO_CC_VCODEC1_CORE_CLK] = &video_cc_vcodec1_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_sdm845_gdscs[] = {
+	[VENUS_GDSC] = &venus_gdsc,
+	[VCODEC0_GDSC] = &vcodec0_gdsc,
+	[VCODEC1_GDSC] = &vcodec1_gdsc,
+};
+
+static const struct regmap_config video_cc_sdm845_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.max_register	= 0xb90,
+	.fast_io	= true,
+};
+
+static const struct qcom_cc_desc video_cc_sdm845_desc = {
+	.config = &video_cc_sdm845_regmap_config,
+	.clks = video_cc_sdm845_clocks,
+	.num_clks = ARRAY_SIZE(video_cc_sdm845_clocks),
+	.gdscs = video_cc_sdm845_gdscs,
+	.num_gdscs = ARRAY_SIZE(video_cc_sdm845_gdscs),
+};
+
+static const struct of_device_id video_cc_sdm845_match_table[] = {
+	{ .compatible = "qcom,sdm845-videocc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, video_cc_sdm845_match_table);
+
+static int video_cc_sdm845_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, &video_cc_sdm845_desc);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	clk_fabia_pll_configure(&video_pll0, regmap, &video_pll0_config);
+
+	return qcom_cc_really_probe(pdev, &video_cc_sdm845_desc, regmap);
+}
+
+static struct platform_driver video_cc_sdm845_driver = {
+	.probe		= video_cc_sdm845_probe,
+	.driver		= {
+		.name	= "sdm845-videocc",
+		.of_match_table = video_cc_sdm845_match_table,
+	},
+};
+
+static int __init video_cc_sdm845_init(void)
+{
+	return platform_driver_register(&video_cc_sdm845_driver);
+}
+subsys_initcall(video_cc_sdm845_init);
+
+static void __exit video_cc_sdm845_exit(void)
+{
+	platform_driver_unregister(&video_cc_sdm845_driver);
+}
+module_exit(video_cc_sdm845_exit);
+
+MODULE_LICENSE("GPL v2");