diff options
| -rw-r--r-- | drivers/gpu/drm/msm/sde/sde_splash.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/sde/sde_splash.c b/drivers/gpu/drm/msm/sde/sde_splash.c index ebb02dba6d5d..b5b6915bb87c 100644 --- a/drivers/gpu/drm/msm/sde/sde_splash.c +++ b/drivers/gpu/drm/msm/sde/sde_splash.c @@ -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, |