[PATCH v4 09/10] clk: qcom: videocc-qcs615: Add QCS615 video clock controller driver

Taniya Das
2025-01-19T10:24:07Z

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

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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 084a4e396983ba78702338b349ee5b22ed47b5b5..0d335d7b3fe30035eda935cf05b2a1660da51e6b 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -549,6 +549,14 @@ 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 f9497e00d4fef8af05865a235fbb833fe6735528..14cdf485ad3d3166c9e639900a4745e5a7f12a96 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_QCS_GCC_404) += gcc-qcs404.o
obj-$(CONFIG_QCS_GCC_615) += gcc-qcs615.o
obj-$(CONFIG_QCS_GCC_8300) += gcc-qcs8300.o
obj-$(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