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Merge "drm: msm: sde: kernel needs to monitor bootloader's flush done"

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Linux Build Service Account 2019-01-08 06:06:36 -08:00 • committed by Gerrit - the friendly Code Review server
commit 97509373bc
1 changed files with 30 additions and 0 deletions
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30
drivers/gpu/drm/msm/sde/sde_splash.c
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@ -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,