[PATCH v4 1/2] phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling

[Devarsh Thakkar]

Hello,

On 05/07/25 08:32, kernel test robot wrote:
> Hi Devarsh,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v6.16-rc4 next-20250704]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Devarsh-Thakkar/phy-cadence-cdns-dphy-Fix-PLL-lock-and-O_CMN_READY-polling/20250704-210349
> base:   linus/master
> patch link:    https://lore.kernel.org/r/20250704125915.1224738-2-devarsht%40ti.com
> patch subject: [PATCH v4 1/2] phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling
> config: x86_64-buildonly-randconfig-003-20250705 (https://download.01.org/0day-ci/archive/20250705/202507051038.XCl5miJ7-lkp@intel.com/config)
> compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250705/202507051038.XCl5miJ7-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp at intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202507051038.XCl5miJ7-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>>> drivers/phy/cadence/cdns-dphy.c:408:45: error: no member named 'hs_clk_rate' in 'struct cdns_dphy_cfg'
>       408 |         ret = cdns_dphy_tx_get_band_ctrl(dphy->cfg.hs_clk_rate);
>           |                                          ~~~~~~~~~ ^
>     1 error generated.
> 

This is expected, since as mentioned in cover-letter this patch needs to 
be applied on top of [1] and [2] from the series [3] as suggested in the 
review [4] for the previous revision.

[1]: 
https://lore.kernel.org/all/20250618-cdns-dsi-impro-v4-4-862c841dbe02@ideasonboard.com/ 

[2]: 
https://lore.kernel.org/all/20250618-cdns-dsi-impro-v4-5-862c841dbe02@ideasonboard.com/ 

[3]: 
https://lore.kernel.org/all/20250618-cdns-dsi-impro-v4-0-862c841dbe02@ideasonboard.com/
[4]: 
https://lore.kernel.org/all/218ba1a0-068d-4bb2-bba2-2739afa7f470@ideasonboard.com/

Regards
Devarsh

> 
> vim +408 drivers/phy/cadence/cdns-dphy.c
> 
>     370	
>     371	static int cdns_dphy_power_on(struct phy *phy)
>     372	{
>     373		struct cdns_dphy *dphy = phy_get_drvdata(phy);
>     374		int ret;
>     375		u32 reg;
>     376	
>     377		if (!dphy->is_configured || dphy->is_powered)
>     378			return -EINVAL;
>     379	
>     380		clk_prepare_enable(dphy->psm_clk);
>     381		clk_prepare_enable(dphy->pll_ref_clk);
>     382	
>     383		/*
>     384		 * Configure the internal PSM clk divider so that the DPHY has a
>     385		 * 1MHz clk (or something close).
>     386		 */
>     387		ret = cdns_dphy_setup_psm(dphy);
>     388		if (ret) {
>     389			dev_err(&dphy->phy->dev, "Failed to setup PSM with error %d\n", ret);
>     390			goto err_power_on;
>     391		}
>     392	
>     393		/*
>     394		 * Configure attach clk lanes to data lanes: the DPHY has 2 clk lanes
>     395		 * and 8 data lanes, each clk lane can be attache different set of
>     396		 * data lanes. The 2 groups are named 'left' and 'right', so here we
>     397		 * just say that we want the 'left' clk lane to drive the 'left' data
>     398		 * lanes.
>     399		 */
>     400		cdns_dphy_set_clk_lane_cfg(dphy, DPHY_CLK_CFG_LEFT_DRIVES_LEFT);
>     401	
>     402		/*
>     403		 * Configure the DPHY PLL that will be used to generate the TX byte
>     404		 * clk.
>     405		 */
>     406		cdns_dphy_set_pll_cfg(dphy, &dphy->cfg);
>     407	
>   > 408		ret = cdns_dphy_tx_get_band_ctrl(dphy->cfg.hs_clk_rate);
>     409		if (ret < 0) {
>     410			dev_err(&dphy->phy->dev, "Failed to get band control value with error %d\n", ret);
>     411			goto err_power_on;
>     412		}
>     413	
>     414		reg = FIELD_PREP(DPHY_BAND_CFG_LEFT_BAND, ret) |
>     415		      FIELD_PREP(DPHY_BAND_CFG_RIGHT_BAND, ret);
>     416		writel(reg, dphy->regs + DPHY_BAND_CFG);
>     417	
>     418		/* Start TX state machine. */
>     419		writel(DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN,
>     420		       dphy->regs + DPHY_CMN_SSM);
>     421	
>     422		ret = cdns_dphy_wait_for_pll_lock(dphy);
>     423		if (ret) {
>     424			dev_err(&dphy->phy->dev, "Failed to lock PLL with error %d\n", ret);
>     425			goto err_power_on;
>     426		}
>     427	
>     428		ret = cdns_dphy_wait_for_cmn_ready(dphy);
>     429		if (ret) {
>     430			dev_err(&dphy->phy->dev, "O_CMN_READY signal failed to assert with error %d\n",
>     431				ret);
>     432			goto err_power_on;
>     433		}
>     434	
>     435		dphy->is_powered = true;
>     436	
>     437		return 0;
>     438	
>     439	err_power_on:
>     440		clk_disable_unprepare(dphy->pll_ref_clk);
>     441		clk_disable_unprepare(dphy->psm_clk);
>     442	
>     443		return ret;
>     444	}
>     445	
>