Re: [v3,PATCH 2/3] pwm: mtk_disp: convert the driver to atomic API

From: kernel test robot
Date: Tue Apr 06 2021 - 10:53:45 EST

Hi Rex-BC,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on v5.12-rc6]
[also build test WARNING on next-20210401]
[cannot apply to pwm/for-next]
[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]

url: https://github.com/0day-ci/linux/commits/Rex-BC-Chen/Convert-the-mtk_disp-driver-to-aotmic-API/20210406-180018
base: e49d033bddf5b565044e2abe4241353959bc9120
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/0a2486ac437e3b8d36a0bf8ce9648c22e42ffda4
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Rex-BC-Chen/Convert-the-mtk_disp-driver-to-aotmic-API/20210406-180018
git checkout 0a2486ac437e3b8d36a0bf8ce9648c22e42ffda4
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from include/linux/device.h:15,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/of_device.h:5,
from drivers/pwm/pwm-mtk-disp.c:13:
drivers/pwm/pwm-mtk-disp.c: In function 'mtk_disp_pwm_enable':
>> drivers/pwm/pwm-mtk-disp.c:108:22: warning: format '%d' expects argument of type 'int', but argument 3 has type 'u64' {aka 'long long unsigned int'} [-Wformat=]
108 | dev_err(chip->dev, "clock rate is too high: rate = %d Hz\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt'
19 | #define dev_fmt(fmt) fmt
| ^~~
drivers/pwm/pwm-mtk-disp.c:108:3: note: in expansion of macro 'dev_err'
108 | dev_err(chip->dev, "clock rate is too high: rate = %d Hz\n",
| ^~~~~~~
drivers/pwm/pwm-mtk-disp.c:108:55: note: format string is defined here
108 | dev_err(chip->dev, "clock rate is too high: rate = %d Hz\n",
| ~^
| |
| int
| %lld


vim +108 drivers/pwm/pwm-mtk-disp.c

70
71 static int mtk_disp_pwm_enable(struct pwm_chip *chip,
72 const struct pwm_state *state)
73 {
74 struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip);
75 u32 clk_div, period, high_width, value, polarity;
76 u64 div, rate;
77 int err;
78
79 /*
80 * Find period, high_width and clk_div to suit duty_ns and period_ns.
81 * Calculate proper div value to keep period value in the bound.
82 *
83 * period_ns = 10^9 * (clk_div + 1) * (period + 1) / PWM_CLK_RATE
84 * duty_ns = 10^9 * (clk_div + 1) * high_width / PWM_CLK_RATE
85 *
86 * period = (PWM_CLK_RATE * period_ns) / (10^9 * (clk_div + 1)) - 1
87 * high_width = (PWM_CLK_RATE * duty_ns) / (10^9 * (clk_div + 1))
88 */
89 if (!mdp->enabled) {
90 err = clk_prepare_enable(mdp->clk_main);
91 if (err < 0) {
92 dev_err(chip->dev, "Can't enable mdp->clk_main: %d\n",
93 err);
94 return err;
95 }
96 err = clk_prepare_enable(mdp->clk_mm);
97 if (err < 0) {
98 dev_err(chip->dev, "Can't enable mdp->clk_mm: %d\n",
99 err);
100 clk_disable_unprepare(mdp->clk_main);
101 return err;
102 }
103 }
104 rate = clk_get_rate(mdp->clk_main);
105 clk_div = div_u64(rate * state->period, NSEC_PER_SEC) >>
106 PWM_PERIOD_BIT_WIDTH;
107 if (clk_div > PWM_CLKDIV_MAX) {
> 108 dev_err(chip->dev, "clock rate is too high: rate = %d Hz\n",
109 rate);
110 clk_disable_unprepare(mdp->clk_mm);
111 clk_disable_unprepare(mdp->clk_main);
112 return -EINVAL;
113 }
114 div = NSEC_PER_SEC * (clk_div + 1);
115 period = div64_u64(rate * state->period, div);
116 if (period > 0)
117 period--;
118
119 high_width = div64_u64(rate * state->duty_cycle, div);
120 value = period | (high_width << PWM_HIGH_WIDTH_SHIFT);
121 polarity = 0;
122 if (state->polarity == PWM_POLARITY_INVERSED)
123 polarity = PWM_POLARITY;
124
125 mtk_disp_pwm_update_bits(mdp, mdp->data->con0,
126 PWM_CLKDIV_MASK,
127 clk_div << PWM_CLKDIV_SHIFT);
128 mtk_disp_pwm_update_bits(mdp, mdp->data->con0,
129 PWM_POLARITY, polarity);
130 mtk_disp_pwm_update_bits(mdp, mdp->data->con1,
131 PWM_PERIOD_MASK | PWM_HIGH_WIDTH_MASK,
132 value);
133
134 if (mdp->data->has_commit) {
135 mtk_disp_pwm_update_bits(mdp, mdp->data->commit,
136 mdp->data->commit_mask,
137 mdp->data->commit_mask);
138 mtk_disp_pwm_update_bits(mdp, mdp->data->commit,
139 mdp->data->commit_mask,
140 0x0);
141 } else {
142 mtk_disp_pwm_update_bits(mdp, mdp->data->bls_debug,
143 mdp->data->bls_debug_mask,
144 mdp->data->bls_debug_mask);
145 mtk_disp_pwm_update_bits(mdp, mdp->data->con0,
146 mdp->data->con0_sel,
147 mdp->data->con0_sel);
148 }
149
150 mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask,
151 mdp->data->enable_mask);
152 mdp->enabled = true;
153 return 0;
154 }
155

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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