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Date: Fri, 29 Apr 2022 18:35:09 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Robert Foss <robert.foss@...aro.org>, bjorn.andersson@...aro.org,
agross@...nel.org, mturquette@...libre.com, sboyd@...nel.org,
robh+dt@...nel.org, krzk+dt@...nel.org, jonathan@...ek.ca,
tdas@...eaurora.org, anischal@...eaurora.org,
linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 6/9] clk: qcom: add support for SM8350 DISPCC
On 29/04/2022 18:12, Robert Foss wrote:
> From: Jonathan Marek <jonathan@...ek.ca>
>
> 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>
> ---
> 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 9b1f54e634b9..1752ca0ee405 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -609,11 +609,11 @@ config SM_DISPCC_6125
> splash screen
>
> 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 22d9cbabecab..95f86ffcc3b3 100644
> --- a/drivers/clk/qcom/dispcc-sm8250.c
> +++ b/drivers/clk/qcom/dispcc-sm8250.c
> @@ -43,6 +43,10 @@ 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,
> @@ -1228,6 +1232,7 @@ static const struct of_device_id disp_cc_sm8250_match_table[] = {
> { .compatible = "qcom,sc8180x-dispcc" },
> { .compatible = "qcom,sm8150-dispcc" },
> { .compatible = "qcom,sm8250-dispcc" },
> + { .compatible = "qcom,sm8350-dispcc" },
> { }
> };
> MODULE_DEVICE_TABLE(of, disp_cc_sm8250_match_table);
> @@ -1258,7 +1263,7 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
> 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,sc8180x-dispcc") ||
> of_device_is_compatible(pdev->dev.of_node, "qcom,sm8150-dispcc")) {
> @@ -1270,8 +1275,62 @@ 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 int i;
> + static bool offset_applied;
> +
> + /* 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 */
Isn't this already being taken care by the previous code?
With this comment removed:
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> clk_lucid_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
> clk_lucid_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
>
--
With best wishes
Dmitry
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