drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 25 ++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_drm_plane.c | 12 ++++++++++++ drivers/gpu/drm/mediatek/mtk_drm_plane.h | 1 + 3 files changed, 38 insertions(+)
dma buffer release before overlay disable, that will cause
m4u translation fault warning.
add dma buffer control flow in mediatek driver:
get dma buffer when drm plane disable
put dma buffer when overlay really disable
Fixes: 41016fe1028e4 ("drm: Rename plane->state variables in atomic update and disable")
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 25 ++++++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 12 ++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_plane.h | 1 +
3 files changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index d40142842f85..49d671100785 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -4,6 +4,7 @@
*/
#include <linux/clk.h>
+#include <linux/dma-buf.h>
#include <linux/dma-mapping.h>
#include <linux/mailbox_controller.h>
#include <linux/pm_runtime.h>
@@ -283,6 +284,23 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
return NULL;
}
+static void mtk_drm_dma_buf_put(struct mtk_drm_crtc *mtk_crtc)
+{
+ unsigned int i;
+
+ for (i = 0; i < mtk_crtc->layer_nr; i++) {
+ struct drm_plane *plane = &mtk_crtc->planes[i];
+ struct mtk_plane_state *plane_state;
+
+ plane_state = to_mtk_plane_state(plane->state);
+
+ if (plane_state && plane_state->pending.dma_buf) {
+ dma_buf_put(plane_state->pending.dma_buf);
+ plane_state->pending.dma_buf = NULL;
+ }
+ }
+}
+
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
{
@@ -323,6 +341,8 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
mtk_crtc->pending_async_planes = false;
}
+ mtk_drm_dma_buf_put(mtk_crtc);
+
mtk_crtc->cmdq_vblank_cnt = 0;
wake_up(&mtk_crtc->cb_blocking_queue);
}
@@ -624,9 +644,14 @@ static void mtk_crtc_ddp_irq(void *data)
else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0)
DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n",
drm_crtc_index(&mtk_crtc->base));
+
+ if (!mtk_crtc->cmdq_client.chan)
+ mtk_drm_dma_buf_put(mtk_crtc);
#else
if (!priv->data->shadow_register)
mtk_crtc_ddp_config(crtc, NULL);
+
+ mtk_drm_dma_buf_put(mtk_crtc);
#endif
mtk_drm_finish_page_flip(mtk_crtc);
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 31f9420aff6f..66e6393e45ee 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -12,6 +12,7 @@
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <linux/align.h>
+#include <linux/dma-buf.h>
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
@@ -266,6 +267,17 @@ static void mtk_plane_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
plane);
struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
+ struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
+ plane);
+
+ if (old_state && old_state->fb) {
+ struct drm_gem_object *gem = old_state->fb->obj[0];
+
+ if (gem && gem->dma_buf) {
+ get_dma_buf(gem->dma_buf);
+ mtk_plane_state->pending.dma_buf = gem->dma_buf;
+ }
+ }
mtk_plane_state->pending.enable = false;
wmb(); /* Make sure the above parameter is set before update */
mtk_plane_state->pending.dirty = true;
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.h b/drivers/gpu/drm/mediatek/mtk_drm_plane.h
index 99aff7da0831..3aba0b58ef3c 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.h
@@ -33,6 +33,7 @@ struct mtk_plane_pending_state {
bool async_dirty;
bool async_config;
enum drm_color_encoding color_encoding;
+ struct dma_buf *dma_buf;
};
struct mtk_plane_state {
--
2.25.1
Il 04/07/23 11:04, Yongqiang Niu ha scritto: > dma buffer release before overlay disable, that will cause > m4u translation fault warning. > > add dma buffer control flow in mediatek driver: > get dma buffer when drm plane disable > put dma buffer when overlay really disable > > Fixes: 41016fe1028e4 ("drm: Rename plane->state variables in atomic update and disable") > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com> Hello, could you please rebase this over [1] for linux-next, while retaining this for stable backports? [1]: https://lore.kernel.org/lkml/20230623094931.117918-1-angelogioacchino.delregno@collabora.com/ Thanks, Angelo > --- > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 25 ++++++++++++++++++++++++ > drivers/gpu/drm/mediatek/mtk_drm_plane.c | 12 ++++++++++++ > drivers/gpu/drm/mediatek/mtk_drm_plane.h | 1 + > 3 files changed, 38 insertions(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > index d40142842f85..49d671100785 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > @@ -4,6 +4,7 @@ > */ > > #include <linux/clk.h> > +#include <linux/dma-buf.h> > #include <linux/dma-mapping.h> > #include <linux/mailbox_controller.h> > #include <linux/pm_runtime.h> > @@ -283,6 +284,23 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc, > return NULL; > } > > +static void mtk_drm_dma_buf_put(struct mtk_drm_crtc *mtk_crtc) > +{ > + unsigned int i; > + > + for (i = 0; i < mtk_crtc->layer_nr; i++) { > + struct drm_plane *plane = &mtk_crtc->planes[i]; > + struct mtk_plane_state *plane_state; > + > + plane_state = to_mtk_plane_state(plane->state); > + > + if (plane_state && plane_state->pending.dma_buf) { > + dma_buf_put(plane_state->pending.dma_buf); > + plane_state->pending.dma_buf = NULL; > + } > + } > +} > + > #if IS_REACHABLE(CONFIG_MTK_CMDQ) > static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) > { > @@ -323,6 +341,8 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) > mtk_crtc->pending_async_planes = false; > } > > + mtk_drm_dma_buf_put(mtk_crtc); > + > mtk_crtc->cmdq_vblank_cnt = 0; > wake_up(&mtk_crtc->cb_blocking_queue); > } > @@ -624,9 +644,14 @@ static void mtk_crtc_ddp_irq(void *data) > else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0) > DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n", > drm_crtc_index(&mtk_crtc->base)); > + > + if (!mtk_crtc->cmdq_client.chan) > + mtk_drm_dma_buf_put(mtk_crtc); > #else > if (!priv->data->shadow_register) > mtk_crtc_ddp_config(crtc, NULL); > + > + mtk_drm_dma_buf_put(mtk_crtc); > #endif > mtk_drm_finish_page_flip(mtk_crtc); > } > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c > index 31f9420aff6f..66e6393e45ee 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c > @@ -12,6 +12,7 @@ > #include <drm/drm_framebuffer.h> > #include <drm/drm_gem_atomic_helper.h> > #include <linux/align.h> > +#include <linux/dma-buf.h> > > #include "mtk_drm_crtc.h" > #include "mtk_drm_ddp_comp.h" > @@ -266,6 +267,17 @@ static void mtk_plane_atomic_disable(struct drm_plane *plane, > struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, > plane); > struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state); > + struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, > + plane); > + > + if (old_state && old_state->fb) { > + struct drm_gem_object *gem = old_state->fb->obj[0]; > + > + if (gem && gem->dma_buf) { > + get_dma_buf(gem->dma_buf); > + mtk_plane_state->pending.dma_buf = gem->dma_buf; > + } > + } > mtk_plane_state->pending.enable = false; > wmb(); /* Make sure the above parameter is set before update */ > mtk_plane_state->pending.dirty = true; > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.h b/drivers/gpu/drm/mediatek/mtk_drm_plane.h > index 99aff7da0831..3aba0b58ef3c 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.h > @@ -33,6 +33,7 @@ struct mtk_plane_pending_state { > bool async_dirty; > bool async_config; > enum drm_color_encoding color_encoding; > + struct dma_buf *dma_buf; > }; > > struct mtk_plane_state {
Hi Yongqiang, kernel test robot noticed the following build errors: [auto build test ERROR on drm-misc/drm-misc-next] [also build test ERROR on linus/master v6.4 next-20230704] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Yongqiang-Niu/drm-mediatek-add-dma-buffer-control-for-drm-plane-disable/20230704-170623 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230704090432.5844-1-yongqiang.niu%40mediatek.com patch subject: [v4, PATCH] drm/mediatek: add dma buffer control for drm plane disable config: arm64-defconfig (https://download.01.org/0day-ci/archive/20230705/202307050325.QZv71se7-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230705/202307050325.QZv71se7-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202307050325.QZv71se7-lkp@intel.com/ All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: module mediatek-drm uses symbol dma_buf_put from namespace DMA_BUF, but does not import it. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
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