Merge "drm: msm: sde: kernel needs to monitor bootloader's flush done" (97509373) · Commits · e / devices / android_kernel_sony_msm8998

drivers/gpu/drm/msm/sde/sde_splash.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,8 @@
		#define SDE_LK_RUNNING_VALUE 0xC001CAFE
		#define SDE_LK_STOP_SPLASH_VALUE 0xDEADDEAD
		#define SDE_LK_EXIT_VALUE 0xDEADBEEF
		#define SDE_LK_INTERMEDIATE_STOP 0xBEEFBEEF
		#define SDE_LK_KERNEL_SPLASH_TALK_LOOP 20

		#define INTF_HDMI_SEL (BIT(25) \| BIT(24))
		#define INTF_DSI0_SEL BIT(8)
		@@ -152,7 +154,35 @@ static bool _sde_splash_lk_check(void)
		*/
		static inline void _sde_splash_notify_lk_stop_splash(void)
		{
		int i = 0;
		int32_t *scratch_pad = NULL;

		/* request Lk to stop splash */
		request_early_service_shutdown(EARLY_DISPLAY);

		/*
		* Before next proceeding, kernel needs to check bootloader's
		* intermediate status to ensure LK's concurrent flush is done.
		*/
		while (i++ < SDE_LK_KERNEL_SPLASH_TALK_LOOP) {

		scratch_pad =
		(int32_t *)get_service_shared_mem_start(EARLY_DISPLAY);

		if (scratch_pad) {
		if ((*scratch_pad != SDE_LK_INTERMEDIATE_STOP) &&
		(_sde_splash_lk_check())) {
		DRM_INFO("wait for LK's intermediate ack\n");
		msleep(20);
		} else {
		SDE_DEBUG("received LK intermediate ack\n");
		break;
		}
		}
		}

		if (i == SDE_LK_KERNEL_SPLASH_TALK_LOOP)
		SDE_ERROR("Loop talk for LK and Kernel failed\n");
		}

		static int _sde_splash_gem_new(struct drm_device *dev,