On 4/20/2022 11:37 AM, Dmitry Baryshkov wrote:
On Wed, 20 Apr 2022 at 20:41, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
On 4/20/2022 12:44 AM, Dmitry Baryshkov wrote:
On 20/04/2022 04:46, Abhinav Kumar wrote:
Make changes to dpu_encoder to support virtual encoder needed
to support writeback for dpu.
changes in v2:
- add the writeback parts to dpu_encoder_helper_phys_cleanup
- rebase on tip of msm-next and fix related dependencies
- get the writeback blocks directly from RM
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 71
+++++++++++++++++-------
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 3 +
2 files changed, 54 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 0e31ad3..06b8631 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -928,6 +928,7 @@ static void
dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
struct dpu_hw_blk *hw_dsc[MAX_CHANNELS_PER_ENC];
int num_lm, num_ctl, num_pp, num_dsc;
unsigned int dsc_mask = 0;
+ enum dpu_hw_blk_type blk_type;
int i;
if (!drm_enc) {
@@ -1009,12 +1010,21 @@ static void
dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
phys->hw_pp = dpu_enc->hw_pp[i];
phys->hw_ctl = to_dpu_hw_ctl(hw_ctl[i]);
- if (phys->intf_idx >= INTF_0 && phys->intf_idx < INTF_MAX)
- phys->hw_intf = dpu_rm_get_intf(&dpu_kms->rm,
phys->intf_idx);
+ if (dpu_encoder_get_intf_mode(&dpu_enc->base) ==
INTF_MODE_WB_LINE)
+ blk_type = DPU_HW_BLK_WB;
+ else
+ blk_type = DPU_HW_BLK_INTF;
+
+ if (phys->intf_idx >= INTF_0 && phys->intf_idx < INTF_MAX) {
+ if (blk_type == DPU_HW_BLK_INTF)
+ phys->hw_intf = dpu_rm_get_intf(&dpu_kms->rm,
phys->intf_idx);
+ else if (blk_type == DPU_HW_BLK_WB)
+ phys->hw_wb = dpu_rm_get_wb(&dpu_kms->rm,
phys->intf_idx);
+ }
- if (!phys->hw_intf) {
+ if (!phys->hw_intf && !phys->hw_wb) {
DPU_ERROR_ENC(dpu_enc,
- "no intf block assigned at idx: %d\n", i);
+ "no intf ow wb block assigned at idx: %d\n", i);
or wb
ack
return;
}
@@ -1157,15 +1167,22 @@ static void dpu_encoder_virt_disable(struct
drm_encoder *drm_enc)
mutex_unlock(&dpu_enc->enc_lock);
}
-static enum dpu_intf dpu_encoder_get_intf(struct dpu_mdss_cfg *catalog,
+static enum dpu_intf dpu_encoder_get_intf_or_wb(struct dpu_mdss_cfg
*catalog,
enum dpu_intf_type type, u32 controller_id)
{
int i = 0;
- for (i = 0; i < catalog->intf_count; i++) {
- if (catalog->intf[i].type == type
- && catalog->intf[i].controller_id == controller_id) {
- return catalog->intf[i].id;
+ if (type != INTF_WB) {
+ for (i = 0; i < catalog->intf_count; i++) {
+ if (catalog->intf[i].type == type
+ && catalog->intf[i].controller_id == controller_id) {
+ return catalog->intf[i].id;
+ }
+ }
+ } else {
+ for (i = 0; i < catalog->wb_count; i++) {
+ if (catalog->wb[i].id == controller_id)
+ return catalog->wb[i].id;
}
}
@@ -1886,16 +1903,27 @@ void dpu_encoder_helper_phys_cleanup(struct
dpu_encoder_phys *phys_enc)
dpu_encoder_helper_reset_mixers(phys_enc);
- for (i = 0; i < dpu_enc->num_phys_encs; i++) {
- if (dpu_enc->phys_encs[i] &&
phys_enc->hw_intf->ops.bind_pingpong_blk)
- phys_enc->hw_intf->ops.bind_pingpong_blk(
- dpu_enc->phys_encs[i]->hw_intf, false,
- dpu_enc->phys_encs[i]->hw_pp->idx);
+ if (phys_enc->hw_wb) {
I think this adds a hidden knowledge here. That there is always just a
single phys_enc for the WB encoder. I'd still do this cleanup in a loop
together with the INTF cleanup.
alright, I can make this change.
+ /* disable the PP block */
+ if (phys_enc->hw_wb->ops.bind_pingpong_blk)
+ phys_enc->hw_wb->ops.bind_pingpong_blk(phys_enc->hw_wb,
false,
+ phys_enc->hw_pp->idx);
- /* mark INTF flush as pending */
- if (phys_enc->hw_ctl->ops.update_pending_flush_intf)
-
phys_enc->hw_ctl->ops.update_pending_flush_intf(phys_enc->hw_ctl,
- dpu_enc->phys_encs[i]->hw_intf->idx);
+ /* mark WB flush as pending */
+ if (phys_enc->hw_ctl->ops.update_pending_flush_wb)
+ phys_enc->hw_ctl->ops.update_pending_flush_wb(ctl,
phys_enc->hw_wb->idx);
+ } else {
+ for (i = 0; i < dpu_enc->num_phys_encs; i++) {
+ if (dpu_enc->phys_encs[i] &&
phys_enc->hw_intf->ops.bind_pingpong_blk)
+ phys_enc->hw_intf->ops.bind_pingpong_blk(
+ dpu_enc->phys_encs[i]->hw_intf, false,
+ dpu_enc->phys_encs[i]->hw_pp->idx);
+
+ /* mark INTF flush as pending */
+ if (phys_enc->hw_ctl->ops.update_pending_flush_intf)
+
phys_enc->hw_ctl->ops.update_pending_flush_intf(phys_enc->hw_ctl,
+ dpu_enc->phys_encs[i]->hw_intf->idx);
+ }
}
/* reset the merge 3D HW block */
@@ -2111,6 +2139,9 @@ static int dpu_encoder_setup_display(struct
dpu_encoder_virt *dpu_enc,
case DRM_MODE_ENCODER_TMDS:
intf_type = INTF_DP;
break;
+ case DRM_MODE_ENCODER_VIRTUAL:
+ intf_type = INTF_WB;
+ break;
}
WARN_ON(disp_info->num_of_h_tiles < 1);
@@ -2145,11 +2176,11 @@ static int dpu_encoder_setup_display(struct
dpu_encoder_virt *dpu_enc,
DPU_DEBUG("h_tile_instance %d = %d, split_role %d\n",
i, controller_id, phys_params.split_role);
- phys_params.intf_idx = dpu_encoder_get_intf(dpu_kms->catalog,
+ phys_params.intf_idx =
dpu_encoder_get_intf_or_wb(dpu_kms->catalog,
intf_type,
controller_id);
I'd prefer to be more explicit here. intf_idx is of type enum dpu_intf,
while WBs are enumerated with enum dpu_wb.
I's suggest adding a separate phys_params.wb_idx and a
dpu_encoder_get_wb() and calling one here depending on intf_type.
Then at the dpu_encoder_virt_atomic_mode_set() you don't need to check
intf_mode, but get both intf and wb and report an error if none was
provided.
Your suggestion is valid and I also thought about it.
Let me explain what prevented me from making the change here and put it
in a to-do bucket.
1) This needs a slighly bigger cleanup including the traces, debug
prints and some helpers as none of them are aware of the wb_idx
2) Some of the checks need to be adjusted like this one
if (phys_params.intf_idx == INTF_MAX) {
DPU_ERROR_ENC(dpu_enc, "could not get intf or wb: type %d,
id %d\n",
intf_type, controller_id);
ret = -EINVAL;
}
So, when we have a separate intf_idx and a wb_idx, having either one of
them is enough . Consider a case where a board has no physical display.
That would have no intf_idx but wb_idx can be valid.
So i think this needs a little careful cleanup.
Considering that I need to test that out more, I decided that for a
short-term we can live with the fact that wb_idx is of type enum
dpu_intf because dpu_encoder layer understands only that.
Let me know if you agree on this separation to go as a follow-up.
Actually both your points vote for the immediate separation rather
than doing it in a follow-up.
For example, if you see an error reported against INTF_2 on a board
where INTF_2 is actually used, you can not determine whether it is an
issue with INTF_2 or with WB_2.
In fact even reporting an error (or a trace) against INTF_NONE (or
INTF_MAX) might be a better option. It would clearly denote that the
issue is related to the non-INTF.
I think we can merge the patch as is, but I'd strongly prefer either
to see an update or a (nearly) immediate followup.
What do you think about an interim solution? We split the
intf_idx/wb_idx in these series, but all the debugging can be updated
later. This way once we see the report against INTF_NONE, we can
deduce that it's WB.
Thank you for your consideration.
I will post a follow-up change to fix this no later than next week.
I will even try doing it this week itself.
I will fix everything together so that it looks like a separate series
of "separating intf_idx and wb_idx" and there is no intermediate mismatch.
Will leave a FIXME here as well.
if (phys_params.intf_idx == INTF_MAX) {
- DPU_ERROR_ENC(dpu_enc, "could not get intf: type %d, id
%d\n",
+ DPU_ERROR_ENC(dpu_enc, "could not get intf or wb: type
%d, id %d\n",
intf_type, controller_id);
ret = -EINVAL;
}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 544a9a4..0b80af4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -11,6 +11,7 @@
#include "dpu_kms.h"
#include "dpu_hw_intf.h"
+#include "dpu_hw_wb.h"
#include "dpu_hw_pingpong.h"
#include "dpu_hw_ctl.h"
#include "dpu_hw_top.h"
@@ -165,6 +166,7 @@ enum dpu_intr_idx {
* @hw_ctl: Hardware interface to the ctl registers
* @hw_pp: Hardware interface to the ping pong registers
* @hw_intf: Hardware interface to the intf registers
+ * @hw_wb: Hardware interface to the wb registers
* @dpu_kms: Pointer to the dpu_kms top level
* @cached_mode: DRM mode cached at mode_set time, acted on in
enable
* @enabled: Whether the encoder has enabled and running a mode
@@ -193,6 +195,7 @@ struct dpu_encoder_phys {
struct dpu_hw_ctl *hw_ctl;
struct dpu_hw_pingpong *hw_pp;
struct dpu_hw_intf *hw_intf;
+ struct dpu_hw_wb *hw_wb;
struct dpu_kms *dpu_kms;
struct drm_display_mode cached_mode;
enum dpu_enc_split_role split_role;
