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authorDave Airlie <airlied@redhat.com>2019-05-31 09:15:14 +1000
committerDave Airlie <airlied@redhat.com>2019-05-31 09:15:25 +1000
commit2a3e0b716296a504d9e65fea7acb379c86fe4283 (patch)
tree5ce5108652a16b63b10ac5578267228cb6909c88 /drivers
parent93c52e7800ba6d1b618c89895ab1eff7e52ad154 (diff)
parent137caa702f2308f7ef03876e164b0d0f3300712a (diff)
Merge tag 'imx-drm-fixes-2019-05-29' of git://git.pengutronix.de/git/pza/linux into drm-fixes
drm/imx: ipuv3-plane: fix frame rate regression on non-plus i.MX6Q Fix a regression introduced by 70e8a0c71e9 ("drm/imx: ipuv3-plane: add function to query atomic update status") that halves the frame rate on non-plus i.MX6Q, because the pending check always returns "pending" even if an update is actually applied. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Philipp Zabel <p.zabel@pengutronix.de> Link: https://patchwork.freedesktop.org/patch/msgid/1559128738.3651.4.camel@pengutronix.de
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/imx/ipuv3-plane.c13
-rw-r--r--drivers/gpu/drm/imx/ipuv3-plane.h1
2 files changed, 8 insertions, 6 deletions
diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c
index d7a727a6e3d7..91edfe2498a6 100644
--- a/drivers/gpu/drm/imx/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3-plane.c
@@ -605,7 +605,6 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
active = ipu_idmac_get_current_buffer(ipu_plane->ipu_ch);
ipu_cpmem_set_buffer(ipu_plane->ipu_ch, !active, eba);
ipu_idmac_select_buffer(ipu_plane->ipu_ch, !active);
- ipu_plane->next_buf = !active;
if (ipu_plane_separate_alpha(ipu_plane)) {
active = ipu_idmac_get_current_buffer(ipu_plane->alpha_ch);
ipu_cpmem_set_buffer(ipu_plane->alpha_ch, !active,
@@ -710,7 +709,6 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 1, eba);
ipu_idmac_lock_enable(ipu_plane->ipu_ch, num_bursts);
ipu_plane_enable(ipu_plane);
- ipu_plane->next_buf = -1;
}
static const struct drm_plane_helper_funcs ipu_plane_helper_funcs = {
@@ -732,10 +730,15 @@ bool ipu_plane_atomic_update_pending(struct drm_plane *plane)
if (ipu_state->use_pre)
return ipu_prg_channel_configure_pending(ipu_plane->ipu_ch);
- else if (ipu_plane->next_buf >= 0)
- return ipu_idmac_get_current_buffer(ipu_plane->ipu_ch) !=
- ipu_plane->next_buf;
+ /*
+ * Pretend no update is pending in the non-PRE/PRG case. For this to
+ * happen, an atomic update would have to be deferred until after the
+ * start of the next frame and simultaneously interrupt latency would
+ * have to be high enough to let the atomic update finish and issue an
+ * event before the previous end of frame interrupt handler can be
+ * executed.
+ */
return false;
}
int ipu_planes_assign_pre(struct drm_device *dev,
diff --git a/drivers/gpu/drm/imx/ipuv3-plane.h b/drivers/gpu/drm/imx/ipuv3-plane.h
index 15e85e15d35c..ffacbcdd2f98 100644
--- a/drivers/gpu/drm/imx/ipuv3-plane.h
+++ b/drivers/gpu/drm/imx/ipuv3-plane.h
@@ -27,7 +27,6 @@ struct ipu_plane {
int dp_flow;
bool disabling;
- int next_buf;
};
struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,