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Date: Wed, 7 Feb 2024 12:28:57 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio
<konrad.dybcio@...aro.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
"Krzysztof
Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley
<conor+dt@...nel.org>,
Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
Taniya Das <quic_tdas@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
<linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
Imran Shaik <quic_imrashai@...cinc.com>,
"Ajit Pandey" <quic_ajipan@...cinc.com>
Subject: Re: [PATCH 2/5] clk: qcom: videocc-sm8550: Add support for SM8650
videocc
On 2/6/2024 5:24 PM, Dmitry Baryshkov wrote:
> On Tue, 6 Feb 2024 at 13:39, Jagadeesh Kona <quic_jkona@...cinc.com> wrote:
>>
>> Add support to the SM8650 video clock controller by extending the
>> SM8550 video clock controller, which is mostly identical but SM8650
>> has few additional clocks and minor differences.
>
> In the past we tried merging similar clock controllers. In the end
> this results in the ugly source code. Please consider submitting a
> separate driver.
>
Thanks Dmitry for your review. SM8650 has only few clock additions and
minor changes compared to SM8550, so I believe it is better to reuse
this existing driver and extend it.
>>
>> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
>> ---
>> drivers/clk/qcom/videocc-sm8550.c | 160 +++++++++++++++++++++++++++++-
>> 1 file changed, 156 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clk/qcom/videocc-sm8550.c b/drivers/clk/qcom/videocc-sm8550.c
>> index f3c9dfaee968..cdc08f5900fc 100644
>> --- a/drivers/clk/qcom/videocc-sm8550.c
>> +++ b/drivers/clk/qcom/videocc-sm8550.c
>> @@ -1,6 +1,6 @@
>> // SPDX-License-Identifier: GPL-2.0-only
>> /*
>> - * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
>> + * Copyright (c) 2023-2024, Qualcomm Innovation Center, Inc. All rights reserved.
>> */
>>
>> #include <linux/clk-provider.h>
>
> [skipping]
>
>> static struct gdsc video_cc_mvs0c_gdsc = {
>> .gdscr = 0x804c,
>> .en_rest_wait_val = 0x2,
>> @@ -354,15 +481,20 @@ static struct clk_regmap *video_cc_sm8550_clocks[] = {
>> [VIDEO_CC_MVS0_CLK] = &video_cc_mvs0_clk.clkr,
>> [VIDEO_CC_MVS0_CLK_SRC] = &video_cc_mvs0_clk_src.clkr,
>> [VIDEO_CC_MVS0_DIV_CLK_SRC] = &video_cc_mvs0_div_clk_src.clkr,
>> + [VIDEO_CC_MVS0_SHIFT_CLK] = &video_cc_mvs0_shift_clk.clkr,
>> [VIDEO_CC_MVS0C_CLK] = &video_cc_mvs0c_clk.clkr,
>> [VIDEO_CC_MVS0C_DIV2_DIV_CLK_SRC] = &video_cc_mvs0c_div2_div_clk_src.clkr,
>> + [VIDEO_CC_MVS0C_SHIFT_CLK] = &video_cc_mvs0c_shift_clk.clkr,
>> [VIDEO_CC_MVS1_CLK] = &video_cc_mvs1_clk.clkr,
>> [VIDEO_CC_MVS1_CLK_SRC] = &video_cc_mvs1_clk_src.clkr,
>> [VIDEO_CC_MVS1_DIV_CLK_SRC] = &video_cc_mvs1_div_clk_src.clkr,
>> + [VIDEO_CC_MVS1_SHIFT_CLK] = &video_cc_mvs1_shift_clk.clkr,
>> [VIDEO_CC_MVS1C_CLK] = &video_cc_mvs1c_clk.clkr,
>> [VIDEO_CC_MVS1C_DIV2_DIV_CLK_SRC] = &video_cc_mvs1c_div2_div_clk_src.clkr,
>> + [VIDEO_CC_MVS1C_SHIFT_CLK] = &video_cc_mvs1c_shift_clk.clkr,
>> [VIDEO_CC_PLL0] = &video_cc_pll0.clkr,
>> [VIDEO_CC_PLL1] = &video_cc_pll1.clkr,
>> + [VIDEO_CC_XO_CLK_SRC] = &video_cc_xo_clk_src.clkr,
>> };
>>
>> static struct gdsc *video_cc_sm8550_gdscs[] = {
>> @@ -380,6 +512,7 @@ static const struct qcom_reset_map video_cc_sm8550_resets[] = {
>> [CVP_VIDEO_CC_MVS1C_BCR] = { 0x8074 },
>> [VIDEO_CC_MVS0C_CLK_ARES] = { 0x8064, 2 },
>> [VIDEO_CC_MVS1C_CLK_ARES] = { 0x8090, 2 },
>> + [VIDEO_CC_XO_CLK_ARES] = { 0x8124, 2 },
>
> Is this reset applicable to videocc-sm8550?
>
SM8550 also has above reset support in hardware, hence it is safe to
model above reset for both SM8550 and SM8650.
>> };
>>
>> static const struct regmap_config video_cc_sm8550_regmap_config = {
>> @@ -402,6 +535,7 @@ static struct qcom_cc_desc video_cc_sm8550_desc = {
>>
>> static const struct of_device_id video_cc_sm8550_match_table[] = {
>> { .compatible = "qcom,sm8550-videocc" },
>> + { .compatible = "qcom,sm8650-videocc" },
>> { }
>> };
>> MODULE_DEVICE_TABLE(of, video_cc_sm8550_match_table);
>> @@ -410,6 +544,7 @@ static int video_cc_sm8550_probe(struct platform_device *pdev)
>> {
>> struct regmap *regmap;
>> int ret;
>> + u32 offset;
>>
>> ret = devm_pm_runtime_enable(&pdev->dev);
>> if (ret)
>> @@ -425,6 +560,23 @@ static int video_cc_sm8550_probe(struct platform_device *pdev)
>> return PTR_ERR(regmap);
>> }
>>
>> + if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8550-videocc")) {
>> + video_cc_sm8550_clocks[VIDEO_CC_MVS0_SHIFT_CLK] = NULL;
>> + video_cc_sm8550_clocks[VIDEO_CC_MVS0C_SHIFT_CLK] = NULL;
>> + video_cc_sm8550_clocks[VIDEO_CC_MVS1_SHIFT_CLK] = NULL;
>> + video_cc_sm8550_clocks[VIDEO_CC_MVS1C_SHIFT_CLK] = NULL;
>> + video_cc_sm8550_clocks[VIDEO_CC_XO_CLK_SRC] = NULL;
>
> Please invert the logic. Make video_cc_sm8550_clocks reflect SM8550
> and patch in new clocks in the SM8650-specific branch below.
>
Sure, will add these clocks as NULL in video_cc_sm8550_clocks and patch
in new clocks here for SM8650. Then we can remove above check for SM8550.
Thanks,
Jagadeesh
>> + offset = 0x8140;
>> + } else if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8650-videocc")) {
>> + video_cc_pll0_config.l = 0x1e;
>> + video_cc_pll0_config.alpha = 0xa000;
>> + video_cc_pll1_config.l = 0x2b;
>> + video_cc_pll1_config.alpha = 0xc000;
>> + video_cc_mvs0_clk_src.freq_tbl = ftbl_video_cc_mvs0_clk_src_sm8650;
>> + video_cc_mvs1_clk_src.freq_tbl = ftbl_video_cc_mvs1_clk_src_sm8650;
>> + offset = 0x8150;
>> + }
>> +
>> clk_lucid_ole_pll_configure(&video_cc_pll0, regmap, &video_cc_pll0_config);
>> clk_lucid_ole_pll_configure(&video_cc_pll1, regmap, &video_cc_pll1_config);
>>
>> @@ -435,7 +587,7 @@ static int video_cc_sm8550_probe(struct platform_device *pdev)
>> * video_cc_xo_clk
>> */
>> regmap_update_bits(regmap, 0x80f4, BIT(0), BIT(0));
>> - regmap_update_bits(regmap, 0x8140, BIT(0), BIT(0));
>> + regmap_update_bits(regmap, offset, BIT(0), BIT(0));
>> regmap_update_bits(regmap, 0x8124, BIT(0), BIT(0));
>>
>> ret = qcom_cc_really_probe(pdev, &video_cc_sm8550_desc, regmap);
>> --
>> 2.43.0
>>
>>
>
>
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