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disp: msm: add support for display early wakeup

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Display clocks and IRQs are disabled during idle state
on command mode for power saving, and will be enabled
when a new frame commits to display driver. But enable
display clocks and IRQs will cause some latency.
So add a new SDE custom IOCTL for user-space to early wake
up display before first frame commits to kernel.

Change-Id: I6ca0188d321c4964f29c46e588b64d06b9634c59
Signed-off-by: Lei Chen <chenlei@codeaurora.org>
This commit is contained in:
Lei Chen
2020-05-26 16:45:52 +08:00
committed by Gerrit - the friendly Code Review server
parent 2bcfcab1cb
commit eb679f5289
5 changed files with 136 additions and 0 deletions
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53
msm/msm_drv.c
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@@ -1626,6 +1626,57 @@ int msm_ioctl_power_ctrl(struct drm_device *dev, void *data,
return rc;
}
/**
* msm_ioctl_display_early_wakeup - early wakeup display.
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
*/
int msm_ioctl_display_hint_ops(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_msm_display_hint *display_hint = data;
struct drm_msm_early_wakeup early_wakeup;
void __user *early_wakeup_usr;
struct msm_drm_private *priv;
struct msm_kms *kms;
priv = dev->dev_private;
kms = priv->kms;
if (unlikely(!display_hint)) {
DRM_ERROR("invalid ioctl data\n");
return -EINVAL;
}
SDE_EVT32(display_hint->hint_flags);
if (display_hint->hint_flags == DRM_MSM_DISPLAY_EARLY_WAKEUP_HINT) {
if (!display_hint->data) {
DRM_ERROR("early_wakeup: wrong parameter\n");
return -EINVAL;
}
early_wakeup_usr =
(void __user *)((uintptr_t)display_hint->data);
if (copy_from_user(&early_wakeup, early_wakeup_usr,
sizeof(early_wakeup))) {
DRM_ERROR("early_wakeup: copy from user failed\n");
return -EINVAL;
}
SDE_EVT32(early_wakeup.wakeup_hint);
if (kms && kms->funcs && kms->funcs->display_early_wakeup
&& early_wakeup.wakeup_hint)
kms->funcs->display_early_wakeup(dev,
early_wakeup.connector_id);
}
return 0;
}
static const struct drm_ioctl_desc msm_ioctls[] = {
DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
@@ -1639,6 +1690,8 @@ static const struct drm_ioctl_desc msm_ioctls[] = {
DRM_IOCTL_DEF_DRV(MSM_RMFB2, msm_ioctl_rmfb2, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(MSM_POWER_CTRL, msm_ioctl_power_ctrl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_DISPLAY_HINT, msm_ioctl_display_hint_ops,
DRM_UNLOCKED),
};
static const struct vm_operations_struct vm_ops = {