linux-kernel - [PATCH v2 1/2] clk: qcom: add support for SM8350 DISPCC

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Message-Id: <20210519001802.1863-1-jonathan@marek.ca>
Date:   Tue, 18 May 2021 20:18:01 -0400
From:   Jonathan Marek <jonathan@...ek.ca>
To:     linux-arm-msm@...r.kernel.org
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-clk@...r.kernel.org (open list:COMMON CLK FRAMEWORK),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/2] clk: qcom: add support for SM8350 DISPCC

Add support to the SM8350 display clock controller by extending the SM8250
display clock controller, which is almost identical but has some minor
differences.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
v2: improved diff (don't move sm8150 case around), update comment

 drivers/clk/qcom/Kconfig         |  4 +--
 drivers/clk/qcom/dispcc-sm8250.c | 61 +++++++++++++++++++++++++++++++-
 2 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 45646b867cdb..cc60e6ee1654 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -484,11 +484,11 @@ config SDX_GCC_55
 	  SPI, I2C, USB, SD/UFS, PCIe etc.
 
 config SM_DISPCC_8250
-	tristate "SM8150 and SM8250 Display Clock Controller"
+	tristate "SM8150/SM8250/SM8350 Display Clock Controller"
 	depends on SM_GCC_8150 || SM_GCC_8250
 	help
 	  Support for the display clock controller on Qualcomm Technologies, Inc
-	  SM8150 and SM8250 devices.
+	  SM8150/SM8250/SM8350 devices.
 	  Say Y if you want to support display devices and functionality such as
 	  splash screen.
 
diff --git a/drivers/clk/qcom/dispcc-sm8250.c b/drivers/clk/qcom/dispcc-sm8250.c
index de09cd5c209f..5f22a715e2f0 100644
--- a/drivers/clk/qcom/dispcc-sm8250.c
+++ b/drivers/clk/qcom/dispcc-sm8250.c
@@ -36,6 +36,10 @@ static struct pll_vco vco_table[] = {
 	{ 249600000, 2000000000, 0 },
 };
 
+static struct pll_vco lucid_5lpe_vco[] = {
+	{ 249600000, 1750000000, 0 },
+};
+
 static struct alpha_pll_config disp_cc_pll0_config = {
 	.l = 0x47,
 	.alpha = 0xE000,
@@ -1039,6 +1043,7 @@ static const struct qcom_cc_desc disp_cc_sm8250_desc = {
 static const struct of_device_id disp_cc_sm8250_match_table[] = {
 	{ .compatible = "qcom,sm8150-dispcc" },
 	{ .compatible = "qcom,sm8250-dispcc" },
+	{ .compatible = "qcom,sm8350-dispcc" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, disp_cc_sm8250_match_table);
@@ -1051,7 +1056,7 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);
 
-	/* note: trion == lucid, except for the prepare() op */
+	/* Apply differences for SM8150 and SM8350 */
 	BUILD_BUG_ON(CLK_ALPHA_PLL_TYPE_TRION != CLK_ALPHA_PLL_TYPE_LUCID);
 	if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8150-dispcc")) {
 		disp_cc_pll0_config.config_ctl_hi_val = 0x00002267;
@@ -1062,8 +1067,62 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
 		disp_cc_pll1_config.config_ctl_hi1_val = 0x00000024;
 		disp_cc_pll1_config.user_ctl_hi1_val = 0x000000D0;
 		disp_cc_pll1_init.ops = &clk_alpha_pll_trion_ops;
+	} else if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8350-dispcc")) {
+		static struct clk_rcg2* const rcgs[] = {
+			&disp_cc_mdss_byte0_clk_src,
+			&disp_cc_mdss_byte1_clk_src,
+			&disp_cc_mdss_dp_aux1_clk_src,
+			&disp_cc_mdss_dp_aux_clk_src,
+			&disp_cc_mdss_dp_link1_clk_src,
+			&disp_cc_mdss_dp_link_clk_src,
+			&disp_cc_mdss_dp_pixel1_clk_src,
+			&disp_cc_mdss_dp_pixel2_clk_src,
+			&disp_cc_mdss_dp_pixel_clk_src,
+			&disp_cc_mdss_esc0_clk_src,
+			&disp_cc_mdss_mdp_clk_src,
+			&disp_cc_mdss_pclk0_clk_src,
+			&disp_cc_mdss_pclk1_clk_src,
+			&disp_cc_mdss_rot_clk_src,
+			&disp_cc_mdss_vsync_clk_src,
+		};
+		static struct clk_regmap_div* const divs[] = {
+			&disp_cc_mdss_byte0_div_clk_src,
+			&disp_cc_mdss_byte1_div_clk_src,
+			&disp_cc_mdss_dp_link1_div_clk_src,
+			&disp_cc_mdss_dp_link_div_clk_src,
+		};
+		unsigned i;
+		static bool offset_applied = false;
+
+		/* only apply the offsets once (in case of deferred probe) */
+		if (!offset_applied) {
+			for (i = 0; i < ARRAY_SIZE(rcgs); i++)
+				rcgs[i]->cmd_rcgr -= 4;
+
+			for (i = 0; i < ARRAY_SIZE(divs); i++) {
+				divs[i]->reg -= 4;
+				divs[i]->width = 4;
+			}
+
+			disp_cc_mdss_ahb_clk.halt_reg -= 4;
+			disp_cc_mdss_ahb_clk.clkr.enable_reg -= 4;
+
+			offset_applied = true;
+		}
+
+		disp_cc_mdss_ahb_clk_src.cmd_rcgr = 0x22a0;
+
+		disp_cc_pll0_config.config_ctl_hi1_val = 0x2A9A699C;
+		disp_cc_pll0_config.test_ctl_hi1_val = 0x01800000;
+		disp_cc_pll0_init.ops = &clk_alpha_pll_lucid_5lpe_ops;
+		disp_cc_pll0.vco_table = lucid_5lpe_vco;
+		disp_cc_pll1_config.config_ctl_hi1_val = 0x2A9A699C;
+		disp_cc_pll1_config.test_ctl_hi1_val = 0x01800000;
+		disp_cc_pll1_init.ops = &clk_alpha_pll_lucid_5lpe_ops;
+		disp_cc_pll1.vco_table = lucid_5lpe_vco;
 	}
 
+	/* note for SM8350: downstream lucid_5lpe configure differs slightly */
 	clk_lucid_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
 	clk_lucid_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
 
-- 
2.26.1