英特尔xmm6321平台camera闪光灯相关记录

来源：互联网发布：网络关系营销的概念编辑：程序博客网时间：2024/06/05 03:59

一、查看硬件闪光灯pin脚

二、修改相关pin脚功能

\linux\kernel\arch\arm\mach-xgold\include\mach\xgold_pinctrl\pcl_hal_cfg_xmm6321a2_es2_rk_tablet_sdk_v1.1.h

/* PCL_PAD_DIF_D7 (52) */{ 64, // GPIO_064{{PCL_HW_GPIO,  PCL_ENABLE | PCL_NO_PUPD | PCL_PUSH_PULL | PCL_DRV_CLASS_E | PCL_RESET_ALL |PCL_GPIO | PCL_GPIO_OUT | PCL_GPIO_D1, },{PCL_HW_GPIO,  PCL_ENABLE | PCL_NO_PUPD | PCL_PUSH_PULL | PCL_DRV_CLASS_E | PCL_RESET_ALL |PCL_GPIO | PCL_GPIO_OUT | PCL_GPIO_D0, },{PCL_HW_GPIO,  PCL_ENABLE | PCL_PU | PCL_PUSH_PULL | PCL_DRV_CLASS_E | PCL_RESET_ALL |PCL_GPIO | PCL_GPIO_IN  | PCL_GPIO_D0, }, }, },

三、控制该pin脚

linux\kernel\arch\arm\plat-xgold\dev-lcd-bl-tablet.c

int xgold_set_flash(int intensity){int ret;unsigned long pcl_state;pr_err("%s Enter intensity=%d\n", __func__,intensity);intensity ? (pcl_state = pcl_deactivate) : (pcl_state = pcl_activate);ret = pin_config_set("xmm6310-pinctrl", "PCL_PAD_DIF_D7",pcl_state);pr_debug("%s Exit\n", __func__);return 0;}EXPORT_SYMBOL_GPL(xgold_set_flash);

说明：
1.如果闪两下觉得不妥，可以修改

linux\kernel\drivers\media\video\xgold\xgold-v4l2.c

int update_mi_mp(struct xgold_v4l2_device *xgold_v4l2){struct xgold_hardware *xgold_hw = &xgold_v4l2->xgold_hw;struct marvinconfig *marvin_config = &xgold_hw->marvin_config;int ret = 0;if (marvin_config->jpeg_config.enable) {/* in case of jpeg encoding, we don't have to disable the   MI, because the encoding   anyway has to be started explicitely */if (!marvin_config->jpeg_config.busy) {if ((xgold_hw->mp_dma_add == marvin_config->mi_config.mp.y_base) && (xgold_hw->mp_dma_add !=marvin_config->mi_config.null_buff_dma_addr)) {#ifdef CONFIG_CAMERA_FLASH_SUPPORT//if (xgold_hw->xgold_flash_enable == FLASH_ON)//xgold_set_flash(1);//去掉此句，#endif

2.闪光灯延迟时间调整
Y:\work\bak-xmm6321\kitkat\hardware\intel\libcamera_native\Camera.h
#define CAMERA_PRE_SHOT_FLASH_US (1000 * 1000)

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