On 27/07/2023 23:25, Marijn Suijten wrote:
On 2023-07-27 22:22:20, Marijn Suijten wrote:
On 2023-07-27 19:21:04, Dmitry Baryshkov wrote:
As the INTF is fixed at the encoder creation time, we can move the
check whether INTF supports tearchck to dpu_encoder_phys_cmd_init().
This function can return an error if INTF doesn't have required feature.
Performing this check in dpu_encoder_phys_cmd_tearcheck_config() is less
useful, as this function returns void.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
.../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 37 +++++++++++--------
1 file changed, 21 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index 04a1106101a7..e1dd0e1b4793 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -325,24 +325,17 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
unsigned long vsync_hz;
struct dpu_kms *dpu_kms;
- if (phys_enc->has_intf_te) {
- if (!phys_enc->hw_intf ||
- !phys_enc->hw_intf->ops.enable_tearcheck) {
- DPU_DEBUG_CMDENC(cmd_enc, "tearcheck not supported\n");
- return;
- }
-
- DPU_DEBUG_CMDENC(cmd_enc, "");
- } else {
- if (!phys_enc->hw_pp ||
- !phys_enc->hw_pp->ops.enable_tearcheck) {
- DPU_DEBUG_CMDENC(cmd_enc, "tearcheck not supported\n");
- return;
- }
-
- DPU_DEBUG_CMDENC(cmd_enc, "pp %d\n", phys_enc->hw_pp->idx -
PINGPONG_0);
+ if (!phys_enc->has_intf_te &&
+ (!phys_enc->hw_pp ||
+ !phys_enc->hw_pp->ops.enable_tearcheck)) {
when is hw_pp assigned? Can't we also check that somewhere in an init
phase?
It would happen right before dpu_encoder_phys_cmd_atomic_mode_set()
where we already happen to check has_intf_te to switch on PP
intr_readptr vs INTF intr_tear_rd_ptr. Might be the perfect place for
the pingpong callback checks?
The problem is that mode_set doesn't return an error (by design). I'd
put a TODO here, so that if we ever move/change resource allocation,
this check can be done next to it (atomic_check isn't a good place,
since phys_enc.atomic_check happens before resource reallocation).
- Marijn
Also, you won't go over 100 chars (not even 80) by having the (!... ||
!...) on a single line.
+ DPU_DEBUG_CMDENC(cmd_enc, "tearcheck not supported\n");
+ return;
}
+ DPU_DEBUG_CMDENC(cmd_enc, "intf %d pp %d\n",
+ phys_enc->hw_intf->idx - INTF_0,
+ phys_enc->hw_pp->idx - PINGPONG_0);
+
mode = &phys_enc->cached_mode;
dpu_kms = phys_enc->dpu_kms;
@@ -768,9 +761,21 @@ struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
phys_enc->intf_mode = INTF_MODE_CMD;
cmd_enc->stream_sel = 0;
+ if (!phys_enc->hw_intf) {
+ DPU_ERROR_CMDENC(cmd_enc, "no INTF provided\n");
+
+ return ERR_PTR(-EINVAL);
+ }
+
if (phys_enc->dpu_kms->catalog->mdss_ver->core_major_ver >= 5)
phys_enc->has_intf_te = true;
+ if (phys_enc->has_intf_te && !phys_enc->hw_intf->ops.enable_tearcheck) {
Any other callbacks we could check here, and remove the checks
elsewhere?
As with enable_tearcheck() though, it does make the code less consistent
with its PP counterpart, which is checked ad-hoc everywhere (but maybe
that is fixable too).
- Marijn
+ DPU_ERROR_CMDENC(cmd_enc, "tearcheck not supported\n");
+
+ return ERR_PTR(-EINVAL);
+ }
+
atomic_set(&cmd_enc->pending_vblank_cnt, 0);
init_waitqueue_head(&cmd_enc->pending_vblank_wq);
--
2.39.2
--
With best wishes
Dmitry
