[PATCH v4 06/10] drm/panel: Add Synaptics R63353 panel driver

[Dan Carpenter]

Hi Dario,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Dario-Binacchi/drm-bridge-Fix-bridge-disable-logic/20231205-185455
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20231205105341.4100896-7-dario.binacchi%40amarulasolutions.com
patch subject: [PATCH v4 06/10] drm/panel: Add Synaptics R63353 panel driver
config: i386-randconfig-r071-20231206 (https://download.01.org/0day-ci/archive/20231207/202312070214.Eyi9T4eq-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231207/202312070214.Eyi9T4eq-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>
| Reported-by: Dan Carpenter <dan.carpenter at linaro.org>
| Closes: https://lore.kernel.org/r/202312070214.Eyi9T4eq-lkp@intel.com/

smatch warnings:
drivers/gpu/drm/panel/panel-synaptics-r63353.c:132 r63353_panel_activate() warn: missing unwind goto?

vim +132 drivers/gpu/drm/panel/panel-synaptics-r63353.c

64f91a53613aea Michael Trimarchi 2023-12-05  107  static int r63353_panel_activate(struct r63353_panel *rpanel)
64f91a53613aea Michael Trimarchi 2023-12-05  108  {
64f91a53613aea Michael Trimarchi 2023-12-05  109  	struct mipi_dsi_device *dsi = rpanel->dsi;
64f91a53613aea Michael Trimarchi 2023-12-05  110  	struct device *dev = &dsi->dev;
64f91a53613aea Michael Trimarchi 2023-12-05  111  	int i, ret;
64f91a53613aea Michael Trimarchi 2023-12-05  112  
64f91a53613aea Michael Trimarchi 2023-12-05  113  	ret = mipi_dsi_dcs_soft_reset(dsi);
64f91a53613aea Michael Trimarchi 2023-12-05  114  	if (ret < 0) {
64f91a53613aea Michael Trimarchi 2023-12-05  115  		dev_err(dev, "Failed to do Software Reset (%d)\n", ret);
64f91a53613aea Michael Trimarchi 2023-12-05  116  		goto fail;
64f91a53613aea Michael Trimarchi 2023-12-05  117  	}
64f91a53613aea Michael Trimarchi 2023-12-05  118  
64f91a53613aea Michael Trimarchi 2023-12-05  119  	usleep_range(15000, 17000);
64f91a53613aea Michael Trimarchi 2023-12-05  120  
64f91a53613aea Michael Trimarchi 2023-12-05  121  	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
64f91a53613aea Michael Trimarchi 2023-12-05  122  	if (ret < 0) {
64f91a53613aea Michael Trimarchi 2023-12-05  123  		dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
64f91a53613aea Michael Trimarchi 2023-12-05  124  		goto fail;
64f91a53613aea Michael Trimarchi 2023-12-05  125  	}
64f91a53613aea Michael Trimarchi 2023-12-05  126  
64f91a53613aea Michael Trimarchi 2023-12-05  127  	for (i = 0; i < rpanel->pdata->init_length; i++) {
64f91a53613aea Michael Trimarchi 2023-12-05  128  		const struct r63353_instr *instr = &rpanel->pdata->init[i];
64f91a53613aea Michael Trimarchi 2023-12-05  129  
64f91a53613aea Michael Trimarchi 2023-12-05  130  		ret = mipi_dsi_dcs_write_buffer(dsi, instr->data, instr->len);
64f91a53613aea Michael Trimarchi 2023-12-05  131  		if (ret < 0)
64f91a53613aea Michael Trimarchi 2023-12-05 @132  			return ret;

goto fail?

64f91a53613aea Michael Trimarchi 2023-12-05  133  	}
64f91a53613aea Michael Trimarchi 2023-12-05  134  
64f91a53613aea Michael Trimarchi 2023-12-05  135  	msleep(120);
64f91a53613aea Michael Trimarchi 2023-12-05  136  
64f91a53613aea Michael Trimarchi 2023-12-05  137  	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
64f91a53613aea Michael Trimarchi 2023-12-05  138  	if (ret < 0) {
64f91a53613aea Michael Trimarchi 2023-12-05  139  		dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
64f91a53613aea Michael Trimarchi 2023-12-05  140  		goto fail;
64f91a53613aea Michael Trimarchi 2023-12-05  141  	}
64f91a53613aea Michael Trimarchi 2023-12-05  142  
64f91a53613aea Michael Trimarchi 2023-12-05  143  	usleep_range(5000, 10000);
64f91a53613aea Michael Trimarchi 2023-12-05  144  
64f91a53613aea Michael Trimarchi 2023-12-05  145  	ret = mipi_dsi_dcs_set_display_on(dsi);
64f91a53613aea Michael Trimarchi 2023-12-05  146  	if (ret < 0) {
64f91a53613aea Michael Trimarchi 2023-12-05  147  		dev_err(dev, "Failed to set display ON (%d)\n", ret);
64f91a53613aea Michael Trimarchi 2023-12-05  148  		goto fail;
64f91a53613aea Michael Trimarchi 2023-12-05  149  	}
64f91a53613aea Michael Trimarchi 2023-12-05  150  
64f91a53613aea Michael Trimarchi 2023-12-05  151  	return 0;
64f91a53613aea Michael Trimarchi 2023-12-05  152  
64f91a53613aea Michael Trimarchi 2023-12-05  153  fail:
64f91a53613aea Michael Trimarchi 2023-12-05  154  	gpiod_set_value(rpanel->reset_gpio, 0);
64f91a53613aea Michael Trimarchi 2023-12-05  155  
64f91a53613aea Michael Trimarchi 2023-12-05  156  	return ret;
64f91a53613aea Michael Trimarchi 2023-12-05  157  }

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