Re: [PATCH 4/5] clk: qcom: Add SDM660 GPU Clock Controller (GPUCC) driver

[Bjorn Andersson <bjorn.andersson@linaro.org>]

On Sat 26 Sep 08:03 CDT 2020, kholk11@gmail.com wrote:

> From: AngeloGioacchino Del Regno <kholk11@gmail.com>
> 
> The GPUCC manages the clocks for the Adreno GPU found on the
> SDM630, SDM636, SDM660 SoCs.
> 
> Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
> ---
>  drivers/clk/qcom/Kconfig                      |   9 +
>  drivers/clk/qcom/Makefile                     |   1 +
>  drivers/clk/qcom/gpucc-sdm660.c               | 349 ++++++++++++++++++
>  include/dt-bindings/clock/qcom,gpucc-sdm660.h |  28 ++
>  4 files changed, 387 insertions(+)
>  create mode 100644 drivers/clk/qcom/gpucc-sdm660.c
>  create mode 100644 include/dt-bindings/clock/qcom,gpucc-sdm660.h
> 
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index a12d37a4d729..377fba33d041 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -366,6 +366,15 @@ config SDM_MMCC_660
>  	  Say Y if you want to support multimedia devices such as display,
>  	  graphics, video encode/decode, camera, etc.
>  
> +config SDM_GPUCC_660
> +	tristate "SDM660 Graphics Clock Controller"
> +	select SDM_GCC_660
> +	select QCOM_GDSC
> +	help
> +	  Support for the graphics clock controller on SDM630/636/660 devices.
> +	  Say Y if you want to support graphics controller devices and
> +	  functionality such as 3D graphics
> +
>  config QCS_TURING_404
>  	tristate "QCS404 Turing Clock Controller"
>  	help
> diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
> index ada4f1bbe203..6a6906a62f96 100644
> --- a/drivers/clk/qcom/Makefile
> +++ b/drivers/clk/qcom/Makefile
> @@ -61,6 +61,7 @@ obj-$(CONFIG_SDM_CAMCC_845) += camcc-sdm845.o
>  obj-$(CONFIG_SDM_DISPCC_845) += dispcc-sdm845.o
>  obj-$(CONFIG_SDM_GCC_660) += gcc-sdm660.o
>  obj-$(CONFIG_SDM_MMCC_660) += mmcc-sdm660.o
> +obj-$(CONFIG_SDM_GPUCC_660) += gpucc-sdm660.o
>  obj-$(CONFIG_SDM_GCC_845) += gcc-sdm845.o
>  obj-$(CONFIG_SDM_GPUCC_845) += gpucc-sdm845.o
>  obj-$(CONFIG_SDM_LPASSCC_845) += lpasscc-sdm845.o
> diff --git a/drivers/clk/qcom/gpucc-sdm660.c b/drivers/clk/qcom/gpucc-sdm660.c
> new file mode 100644
> index 000000000000..447a34aaa21f
> --- /dev/null
> +++ b/drivers/clk/qcom/gpucc-sdm660.c
> @@ -0,0 +1,349 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2020, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2020, AngeloGioacchino Del Regno <kholk11@gmail.com>
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/err.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/reset-controller.h>
> +#include <dt-bindings/clock/qcom,gpucc-sdm660.h>
> +
> +#include "clk-alpha-pll.h"
> +#include "common.h"
> +#include "clk-regmap.h"
> +#include "clk-pll.h"
> +#include "clk-rcg.h"
> +#include "clk-branch.h"
> +#include "gdsc.h"
> +#include "reset.h"
> +
> +enum {
> +	P_GPU_XO,
> +	P_CORE_BI_PLL_TEST_SE,
> +	P_GPLL0_OUT_MAIN,
> +	P_GPLL0_OUT_MAIN_DIV,
> +	P_GPU_PLL0_PLL_OUT_MAIN,
> +	P_GPU_PLL1_PLL_OUT_MAIN,
> +};
> +
> +static struct clk_branch gpucc_cxo_clk = {
> +	.halt_reg = 0x1020,
> +	.clkr = {
> +		.enable_reg = 0x1020,
> +		.enable_mask = BIT(0),
> +		.hw.init = &(struct clk_init_data){
> +			.name = "gpucc_cxo_clk",
> +			.parent_data = &(const struct clk_parent_data){
> +				.fw_name = "xo",
> +				.name = "xo"
> +			},
> +			.num_parents = 1,
> +			.ops = &clk_branch2_ops,
> +			.flags = CLK_IS_CRITICAL,
> +		},
> +	},
> +};
> +
> +static struct pll_vco gpu_vco[] = {
> +	{ 1000000000, 2000000000, 0 },
> +	{ 500000000,  1000000000, 2 },
> +	{ 250000000,   500000000, 3 },
> +};
> +
> +static struct clk_alpha_pll gpu_pll0_pll_out_main = {
> +	.offset = 0x0,
> +	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
> +	.vco_table = gpu_vco,
> +	.num_vco = ARRAY_SIZE(gpu_vco),
> +	.clkr.hw.init = &(struct clk_init_data){
> +		.name = "gpu_pll0_pll_out_main",
> +		.parent_data =  &(const struct clk_parent_data){
> +			.hw = &gpucc_cxo_clk.clkr.hw,
> +		},
> +		.num_parents = 1,
> +		.ops = &clk_alpha_pll_ops,
> +	},
> +};
> +
> +static struct clk_alpha_pll gpu_pll1_pll_out_main = {
> +	.offset = 0x40,
> +	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
> +	.vco_table = gpu_vco,
> +	.num_vco = ARRAY_SIZE(gpu_vco),
> +	.clkr.hw.init = &(struct clk_init_data){
> +		.name = "gpu_pll1_pll_out_main",
> +		.parent_data = &(const struct clk_parent_data){
> +			.hw = &gpucc_cxo_clk.clkr.hw,
> +		},
> +		.num_parents = 1,
> +		.ops = &clk_alpha_pll_ops,
> +	},
> +};
> +
> +static const struct parent_map gpucc_parent_map_1[] = {
> +	{ P_GPU_XO, 0 },
> +	{ P_GPU_PLL0_PLL_OUT_MAIN, 1 },
> +	{ P_GPU_PLL1_PLL_OUT_MAIN, 3 },
> +	{ P_GPLL0_OUT_MAIN, 5 },
> +};
> +
> +static const struct clk_parent_data gpucc_parent_data_1[] = {
> +	{ .hw = &gpucc_cxo_clk.clkr.hw },
> +	{ .hw = &gpu_pll0_pll_out_main.clkr.hw },
> +	{ .hw = &gpu_pll1_pll_out_main.clkr.hw },
> +	{ .fw_name = "gcc_gpu_gpll0_clk", .name = "gcc_gpu_gpll0_clk" },
> +};
> +
> +static struct clk_rcg2_gfx3d gfx3d_clk_src = {
> +	.div = 2,
> +	.rcg = {
> +		.cmd_rcgr = 0x1070,
> +		.mnd_width = 0,
> +		.hid_width = 5,
> +		.parent_map = gpucc_parent_map_1,
> +		.clkr.hw.init = &(struct clk_init_data){
> +			.name = "gfx3d_clk_src",
> +			.parent_data = gpucc_parent_data_1,
> +			.num_parents = 4,
> +			.ops = &clk_gfx3d_ops,
> +			.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
> +		},
> +	},
> +	.hws = (struct clk_hw*[]){
> +		&gpucc_cxo_clk.clkr.hw,
> +		&gpu_pll0_pll_out_main.clkr.hw,
> +		&gpu_pll1_pll_out_main.clkr.hw,
> +	}
> +};
> +
> +static struct clk_branch gpucc_gfx3d_clk = {
> +	.halt_reg = 0x1098,
> +	.halt_check = BRANCH_HALT,
> +	.hwcg_reg = 0x1098,
> +	.hwcg_bit = 1,
> +	.clkr = {
> +		.enable_reg = 0x1098,
> +		.enable_mask = BIT(0),
> +		.hw.init = &(struct clk_init_data){
> +			.name = "gpucc_gfx3d_clk",
> +			.parent_data = &(const struct clk_parent_data){
> +				.hw = &gfx3d_clk_src.rcg.clkr.hw,
> +			},
> +			.num_parents = 1,
> +			.ops = &clk_branch2_ops,
> +			.flags = CLK_SET_RATE_PARENT,
> +		},
> +	},
> +};
> +
> +static const struct parent_map gpucc_parent_map_0[] = {
> +	{ P_GPU_XO, 0 },
> +	{ P_GPLL0_OUT_MAIN, 5 },
> +	{ P_GPLL0_OUT_MAIN_DIV, 6 },
> +};
> +
> +static const struct clk_parent_data gpucc_parent_data_0[] = {
> +	{ .hw = &gpucc_cxo_clk.clkr.hw },
> +	{ .fw_name = "gcc_gpu_gpll0_clk", .name = "gcc_gpu_gpll0_clk" },
> +	{ .fw_name = "gcc_gpu_gpll0_div_clk", .name = "gcc_gpu_gpll0_div_clk" },
> +};
> +
> +static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
> +	F(19200000, P_GPU_XO, 1, 0, 0),
> +	{ }
> +};
> +
> +static struct clk_rcg2 rbbmtimer_clk_src = {
> +	.cmd_rcgr = 0x10b0,
> +	.mnd_width = 0,
> +	.hid_width = 5,
> +	.parent_map = gpucc_parent_map_0,
> +	.freq_tbl = ftbl_rbbmtimer_clk_src,
> +	.clkr.hw.init = &(struct clk_init_data){
> +		.name = "rbbmtimer_clk_src",
> +		.parent_data = gpucc_parent_data_0,
> +		.num_parents = 3,
> +		.ops = &clk_rcg2_ops,
> +	},
> +};
> +
> +static const struct freq_tbl ftbl_rbcpr_clk_src[] = {
> +	F(19200000, P_GPU_XO, 1, 0, 0),
> +	F(50000000, P_GPLL0_OUT_MAIN_DIV, 6, 0, 0),
> +	{ }
> +};
> +
> +static struct clk_rcg2 rbcpr_clk_src = {
> +	.cmd_rcgr = 0x1030,
> +	.mnd_width = 0,
> +	.hid_width = 5,
> +	.parent_map = gpucc_parent_map_0,
> +	.freq_tbl = ftbl_rbcpr_clk_src,
> +	.clkr.hw.init = &(struct clk_init_data){
> +		.name = "rbcpr_clk_src",
> +		.parent_data = gpucc_parent_data_0,
> +		.num_parents = 3,
> +		.ops = &clk_rcg2_ops,
> +	},
> +};
> +
> +static struct clk_branch gpucc_rbbmtimer_clk = {
> +	.halt_reg = 0x10d0,
> +	.halt_check = BRANCH_HALT,
> +	.clkr = {
> +		.enable_reg = 0x10d0,
> +		.enable_mask = BIT(0),
> +		.hw.init = &(struct clk_init_data){
> +			.name = "gpucc_rbbmtimer_clk",
> +			.parent_names = (const char *[]){
> +				"rbbmtimer_clk_src",
> +			},
> +			.num_parents = 1,
> +			.flags = CLK_SET_RATE_PARENT,
> +			.ops = &clk_branch2_ops,
> +		},
> +	},
> +};
> +
> +static struct clk_branch gpucc_rbcpr_clk = {
> +	.halt_reg = 0x1054,
> +	.halt_check = BRANCH_HALT,
> +	.clkr = {
> +		.enable_reg = 0x1054,
> +		.enable_mask = BIT(0),
> +		.hw.init = &(struct clk_init_data){
> +			.name = "gpucc_rbcpr_clk",
> +			.parent_names = (const char *[]){
> +				"rbcpr_clk_src",
> +			},
> +			.num_parents = 1,
> +			.flags = CLK_SET_RATE_PARENT,
> +			.ops = &clk_branch2_ops,
> +		},
> +	},
> +};
> +
> +static struct gdsc gpu_cx_gdsc = {
> +	.gdscr = 0x1004,
> +	.gds_hw_ctrl = 0x1008,
> +	.pd = {
> +		.name = "gpu_cx",
> +	},
> +	.pwrsts = PWRSTS_OFF_ON,
> +	.flags = VOTABLE,
> +};
> +
> +static struct gdsc gpu_gx_gdsc = {
> +	.gdscr = 0x1094,
> +	.clamp_io_ctrl = 0x130,
> +	.resets = (unsigned int []){ GPU_GX_BCR },
> +	.reset_count = 1,
> +	.cxcs = (unsigned int []){ 0x1098 },
> +	.cxc_count = 1,
> +	.pd = {
> +		.name = "gpu_gx",
> +	},
> +	.parent = &gpu_cx_gdsc.pd,
> +	.pwrsts = PWRSTS_OFF | PWRSTS_ON | PWRSTS_RET,
> +	.flags = CLAMP_IO | SW_RESET | AON_RESET | NO_RET_PERIPH,
> +	//.supply = "vdd-gx";
> +};
> +
> +static struct gdsc *gpucc_sdm660_gdscs[] = {
> +	[GPU_CX_GDSC] = &gpu_cx_gdsc,
> +	[GPU_GX_GDSC] = &gpu_gx_gdsc,
> +};
> +
> +static const struct qcom_reset_map gpucc_sdm660_resets[] = {
> +	[GPU_CX_BCR] = { 0x1000 },
> +	[RBCPR_BCR] = { 0x1050 },
> +	[GPU_GX_BCR] = { 0x1090 },
> +	[SPDM_BCR] = { 0x10E0 },
> +};
> +
> +static struct clk_regmap *gpucc_sdm660_clocks[] = {
> +	[GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr,
> +	[GPU_PLL0_PLL] = &gpu_pll0_pll_out_main.clkr,
> +	[GPU_PLL1_PLL] = &gpu_pll1_pll_out_main.clkr,
> +	[GFX3D_CLK_SRC] = &gfx3d_clk_src.rcg.clkr,
> +	[RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr,
> +	[RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr,
> +	[GPUCC_RBCPR_CLK] = &gpucc_rbcpr_clk.clkr,
> +	[GPUCC_GFX3D_CLK] = &gpucc_gfx3d_clk.clkr,
> +	[GPUCC_RBBMTIMER_CLK] = &gpucc_rbbmtimer_clk.clkr,
> +};
> +
> +static const struct regmap_config gpucc_660_regmap_config = {
> +	.reg_bits	= 32,
> +	.reg_stride	= 4,
> +	.val_bits	= 32,
> +	.max_register	= 0x9034,
> +	.fast_io	= true,
> +};
> +
> +static const struct qcom_cc_desc gpucc_sdm660_desc = {
> +	.config = &gpucc_660_regmap_config,
> +	.clks = gpucc_sdm660_clocks,
> +	.num_clks = ARRAY_SIZE(gpucc_sdm660_clocks),
> +	.resets = gpucc_sdm660_resets,
> +	.num_resets = ARRAY_SIZE(gpucc_sdm660_resets),
> +	.gdscs = gpucc_sdm660_gdscs,
> +	.num_gdscs = ARRAY_SIZE(gpucc_sdm660_gdscs),
> +};
> +
> +static const struct of_device_id gpucc_sdm660_match_table[] = {
> +	{ .compatible = "qcom,gpucc-sdm660" },
> +	{ .compatible = "qcom,gpucc-sdm630" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, gpucc_sdm660_match_table);
> +
> +static int gpucc_sdm660_probe(struct platform_device *pdev)
> +{
> +	struct regmap *regmap;
> +	struct alpha_pll_config gpu_pll_config = {
> +		.config_ctl_val = 0x4001055b,
> +		.alpha = 0xaaaaab00,
> +		.alpha_en_mask = BIT(24),
> +		.vco_val = 0x2 << 20,
> +		.vco_mask = 0x3 << 20,
> +		.main_output_mask = 0x1,
> +	};
> +
> +	regmap = qcom_cc_map(pdev, &gpucc_sdm660_desc);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	/* 800MHz configuration for GPU PLL0 */
> +	gpu_pll_config.l = 0x29;
> +	gpu_pll_config.alpha_hi = 0xaa;
> +	clk_alpha_pll_configure(&gpu_pll0_pll_out_main, regmap, &gpu_pll_config);
> +
> +	/* 740MHz configuration for GPU PLL1 */
> +	gpu_pll_config.l = 0x26;
> +	gpu_pll_config.alpha_hi = 0x8a;
> +	clk_alpha_pll_configure(&gpu_pll1_pll_out_main, regmap, &gpu_pll_config);
> +
> +	return qcom_cc_really_probe(pdev, &gpucc_sdm660_desc, regmap);
> +}
> +
> +static struct platform_driver gpucc_sdm660_driver = {
> +	.probe		= gpucc_sdm660_probe,
> +	.driver		= {
> +		.name	= "gpucc-sdm660",
> +		.of_match_table = gpucc_sdm660_match_table,
> +	},
> +};
> +module_platform_driver(gpucc_sdm660_driver);
> +
> +MODULE_DESCRIPTION("QCOM GPUCC SDM660/630 Driver");
> +MODULE_LICENSE("GPL v2");

I think this part looks good. So for this part you have my:

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>


> diff --git a/include/dt-bindings/clock/qcom,gpucc-sdm660.h b/include/dt-bindings/clock/qcom,gpucc-sdm660.h
> new file mode 100644
> index 000000000000..680eaabd838d
> --- /dev/null
> +++ b/include/dt-bindings/clock/qcom,gpucc-sdm660.h
> @@ -0,0 +1,28 @@
> +/* SPDX-License-Identifier: GPL-2.0 */

But please move this to the binding, reorder them and please update the
license to "GPL-2.0-only OR BSD-2-Clause".

Regards,
Bjorn

> +/*
> + * Copyright (c) 2020, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2020, AngeloGioacchino Del Regno <kholk11@gmail.com>
> + */
> +
> +#ifndef _DT_BINDINGS_CLK_SDM_GPUCC_660_H
> +#define _DT_BINDINGS_CLK_SDM_GPUCC_660_H
> +
> +#define GPUCC_CXO_CLK			0
> +#define GPU_PLL0_PLL			1
> +#define GPU_PLL1_PLL			2
> +#define GFX3D_CLK_SRC			3
> +#define RBCPR_CLK_SRC			4
> +#define RBBMTIMER_CLK_SRC		5
> +#define GPUCC_RBCPR_CLK			6
> +#define GPUCC_GFX3D_CLK			7
> +#define GPUCC_RBBMTIMER_CLK		8
> +
> +#define GPU_CX_GDSC			0
> +#define GPU_GX_GDSC			1
> +
> +#define GPU_CX_BCR			0
> +#define GPU_GX_BCR			1
> +#define RBCPR_BCR			2
> +#define SPDM_BCR			3
> +
> +#endif
> -- 
> 2.28.0
>