drm/msm/dpu: Remove dpu_kms_pm_suspend/resume
PM resume was crashing during dpu_kms_pm_resume. This patch removes dpu_kms_pm_suspend/resume so that msm_pm_suspend/resume uses the atomic helpers instead (see next patch). This patch also removes dpu_kms_is_suspend_blocked since it is never called. v2: Reorganized patches in patchset Signed-off-by: Bruce Wang <bzwang@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
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@ -709,127 +709,6 @@ static void dpu_kms_destroy(struct msm_kms *kms)
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_dpu_kms_hw_destroy(dpu_kms);
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}
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static int dpu_kms_pm_suspend(struct device *dev)
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{
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struct drm_device *ddev;
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struct drm_modeset_acquire_ctx ctx;
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struct drm_atomic_state *state;
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struct dpu_kms *dpu_kms;
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int ret = 0, num_crtcs = 0;
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if (!dev)
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return -EINVAL;
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ddev = dev_get_drvdata(dev);
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if (!ddev || !ddev_to_msm_kms(ddev))
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return -EINVAL;
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dpu_kms = to_dpu_kms(ddev_to_msm_kms(ddev));
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/* disable hot-plug polling */
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drm_kms_helper_poll_disable(ddev);
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/* acquire modeset lock(s) */
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drm_modeset_acquire_init(&ctx, 0);
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retry:
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DPU_ATRACE_BEGIN("kms_pm_suspend");
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ret = drm_modeset_lock_all_ctx(ddev, &ctx);
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if (ret)
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goto unlock;
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/* save current state for resume */
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if (dpu_kms->suspend_state)
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drm_atomic_state_put(dpu_kms->suspend_state);
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dpu_kms->suspend_state = drm_atomic_helper_duplicate_state(ddev, &ctx);
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if (IS_ERR_OR_NULL(dpu_kms->suspend_state)) {
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DRM_ERROR("failed to back up suspend state\n");
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dpu_kms->suspend_state = NULL;
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goto unlock;
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}
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/* create atomic state to disable all CRTCs */
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state = drm_atomic_state_alloc(ddev);
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if (IS_ERR_OR_NULL(state)) {
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DRM_ERROR("failed to allocate crtc disable state\n");
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goto unlock;
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}
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state->acquire_ctx = &ctx;
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/* check for nothing to do */
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if (num_crtcs == 0) {
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DRM_DEBUG("all crtcs are already in the off state\n");
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drm_atomic_state_put(state);
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goto suspended;
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}
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/* commit the "disable all" state */
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ret = drm_atomic_commit(state);
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if (ret < 0) {
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DRM_ERROR("failed to disable crtcs, %d\n", ret);
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drm_atomic_state_put(state);
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goto unlock;
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}
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suspended:
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dpu_kms->suspend_block = true;
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unlock:
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if (ret == -EDEADLK) {
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drm_modeset_backoff(&ctx);
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goto retry;
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}
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drm_modeset_drop_locks(&ctx);
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drm_modeset_acquire_fini(&ctx);
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DPU_ATRACE_END("kms_pm_suspend");
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return 0;
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}
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static int dpu_kms_pm_resume(struct device *dev)
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{
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struct drm_device *ddev;
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struct dpu_kms *dpu_kms;
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int ret;
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if (!dev)
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return -EINVAL;
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ddev = dev_get_drvdata(dev);
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if (!ddev || !ddev_to_msm_kms(ddev))
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return -EINVAL;
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dpu_kms = to_dpu_kms(ddev_to_msm_kms(ddev));
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DPU_ATRACE_BEGIN("kms_pm_resume");
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drm_mode_config_reset(ddev);
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drm_modeset_lock_all(ddev);
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dpu_kms->suspend_block = false;
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if (dpu_kms->suspend_state) {
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dpu_kms->suspend_state->acquire_ctx =
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ddev->mode_config.acquire_ctx;
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ret = drm_atomic_commit(dpu_kms->suspend_state);
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if (ret < 0) {
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DRM_ERROR("failed to restore state, %d\n", ret);
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drm_atomic_state_put(dpu_kms->suspend_state);
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}
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dpu_kms->suspend_state = NULL;
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}
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drm_modeset_unlock_all(ddev);
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/* enable hot-plug polling */
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drm_kms_helper_poll_enable(ddev);
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DPU_ATRACE_END("kms_pm_resume");
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return 0;
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}
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static void _dpu_kms_set_encoder_mode(struct msm_kms *kms,
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struct drm_encoder *encoder,
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bool cmd_mode)
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@ -873,8 +752,6 @@ static const struct msm_kms_funcs kms_funcs = {
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.check_modified_format = dpu_format_check_modified_format,
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.get_format = dpu_get_msm_format,
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.round_pixclk = dpu_kms_round_pixclk,
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.pm_suspend = dpu_kms_pm_suspend,
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.pm_resume = dpu_kms_pm_resume,
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.destroy = dpu_kms_destroy,
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.set_encoder_mode = _dpu_kms_set_encoder_mode,
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#ifdef CONFIG_DEBUG_FS
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@ -137,7 +137,6 @@ struct dpu_kms {
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/* saved atomic state during system suspend */
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struct drm_atomic_state *suspend_state;
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bool suspend_block;
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struct dpu_rm rm;
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bool rm_init;
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@ -176,20 +175,6 @@ static inline bool dpu_kms_is_suspend_state(struct drm_device *dev)
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return to_dpu_kms(ddev_to_msm_kms(dev))->suspend_state != NULL;
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}
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/**
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* dpu_kms_is_suspend_blocked - whether or not commits are blocked due to pm
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* suspend status
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* @dev: Pointer to drm device
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* Return: True if commits should be rejected due to pm suspend
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*/
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static inline bool dpu_kms_is_suspend_blocked(struct drm_device *dev)
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{
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if (!dpu_kms_is_suspend_state(dev))
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return false;
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return to_dpu_kms(ddev_to_msm_kms(dev))->suspend_block;
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}
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/**
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* Debugfs functions - extra helper functions for debugfs support
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*
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