一、查看硬件閃光燈pin腳

二、修改相關pin腳功能

\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、控制該pin腳

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);

說明：
1.如果閃兩下覺得不妥，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 theMI, because the encodinganyway 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.閃光燈延遲時間調整
Y:\work\bak-xmm6321\kitkat\hardware\intel\libcamera_native\Camera.h
#define CAMERA_PRE_SHOT_FLASH_US (1000 * 1000)

總結

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