From c0af63193bd307f281211e7fb32a02a52c2869b2 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 22 Mar 2023 09:53:17 +0100 Subject: [PATCH] drm/vc4: hvs: Print error if we fail an allocation We need to allocate a few additional structures when checking our atomic_state, especially related to hardware SRAM that will hold the plane descriptors (DLIST) and the current line context (LBM) during composition. Since those allocation can fail, let's add some error message in that case to help debug what goes wrong. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hvs.c | 6 +++++- drivers/gpu/drm/vc4/vc4_plane.c | 7 +++++-- 2 files changed, 10 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -441,6 +441,8 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs unsigned int channel, size_t dlist_count) { + struct vc4_dev *vc4 = hvs->vc4; + struct drm_device *dev = &vc4->base; struct vc4_hvs_dlist_allocation *alloc; unsigned long flags; int ret; @@ -458,8 +460,10 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs ret = drm_mm_insert_node(&hvs->dlist_mm, &alloc->mm_node, dlist_count); spin_unlock_irqrestore(&hvs->mm_lock, flags); - if (ret) + if (ret) { + drm_err(dev, "Failed to allocate DLIST entry: %d\n", ret); return ERR_PTR(ret); + } alloc->channel = channel; --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -733,7 +733,8 @@ static void vc4_plane_calc_load(struct d static int vc4_plane_allocate_lbm(struct drm_plane_state *state) { - struct vc4_dev *vc4 = to_vc4_dev(state->plane->dev); + struct drm_device *drm = state->plane->dev; + struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_plane_state *vc4_state = to_vc4_plane_state(state); unsigned long irqflags; u32 lbm_size; @@ -759,8 +760,10 @@ static int vc4_plane_allocate_lbm(struct 0, 0); spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags); - if (ret) + if (ret) { + drm_err(drm, "Failed to allocate LBM entry: %d\n", ret); return ret; + } } else { WARN_ON_ONCE(lbm_size != vc4_state->lbm.size); }