Re: [PATCH 14/25] drm/msm/dpu: remove enc_id tagging for hw blocks

Sean Paul
2018-10-10T15:06:33Z

On Mon, Oct 08, 2018 at 09:27:31PM -0700, Jeykumar Sankaran wrote:
> RM was using encoder id's to tag HW block's to reserve
> and retrieve later for display pipeline. Now
> that all the reserved HW blocks for a display are
> maintained in its crtc state, no retrieval is needed.
> This patch cleans up RM of encoder id tagging.
>
> Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 90 +++++++++----------------------
> drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h | 28 ++++------
> 2 files changed, 36 insertions(+), 82 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> index 303f1b3..a8461b8 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> @@ -21,9 +21,6 @@
> #include "dpu_encoder.h"
> #include "dpu_trace.h"
>
> -#define RESERVED_BY_OTHER(h, r) \
> - ((h)->enc_id && (h)->enc_id != r)
> -
> /**
> * struct dpu_rm_requirements - Reservation requirements parameter bundle
> * @topology: selected topology for the display
> @@ -38,12 +35,13 @@ struct dpu_rm_requirements {
> /**
> * struct dpu_rm_hw_blk - hardware block tracking list member
> * @list: List head for list of all hardware blocks tracking items
> - * @enc_id: Encoder id to which this blk is binded
> + * @in_use: True, if the hw block is assigned to a display pipeline.
> + * False, otherwise
> * @hw: Pointer to the hardware register access object for this block
> */
> struct dpu_rm_hw_blk {
> struct list_head list;
> - uint32_t enc_id;
> + bool in_use;

How do the reservations work for TEST_ONLY commits? At a quick glance it looks
like they might be marked in_use?

Sean

> struct dpu_hw_blk *hw;
> };
>
> @@ -51,23 +49,19 @@ struct dpu_rm_hw_blk {
> * struct dpu_rm_hw_iter - iterator for use with dpu_rm
> * @hw: dpu_hw object requested, or NULL on failure
> * @blk: dpu_rm internal block representation. Clients ignore. Used as iterator.
> - * @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
> * @type: Hardware Block Type client wishes to search for.
> */
> struct dpu_rm_hw_iter {
> struct dpu_hw_blk *hw;
> struct dpu_rm_hw_blk *blk;
> - uint32_t enc_id;
> enum dpu_hw_blk_type type;
> };
>
> static void _dpu_rm_init_hw_iter(
> struct dpu_rm_hw_iter *iter,
> - uint32_t enc_id,
> enum dpu_hw_blk_type type)
> {
> memset(iter, 0, sizeof(*iter));
> - iter->enc_id = enc_id;
> iter->type = type;
> }
>
> @@ -91,16 +85,12 @@ static bool _dpu_rm_get_hw_locked(struct dpu_rm *rm, struct dpu_rm_hw_iter *i)
> i->blk = list_prepare_entry(i->blk, blk_list, list);
>
> list_for_each_entry_continue(i->blk, blk_list, list) {
> - if (i->enc_id == i->blk->enc_id) {
> + if (!i->blk->in_use) {
> i->hw = i->blk->hw;
> - DPU_DEBUG("found type %d id %d for enc %d\n",
> - i->type, i->blk->hw->id, i->enc_id);
> return true;
> }
> }
>
> - DPU_DEBUG("no match, type %d for enc %d\n", i->type, i->enc_id);
> -
> return false;
> }
>
> @@ -196,7 +186,6 @@ static int _dpu_rm_hw_blk_create(
> }
>
> blk->hw = hw;
> - blk->enc_id = 0;
> list_add_tail(&blk->list, &rm->hw_blks[type]);
>
> return 0;
> @@ -301,7 +290,6 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top)
> * proposed use case requirements, incl. hardwired dependent blocks like
> * pingpong
> * @rm: dpu resource manager handle
> - * @enc_id: encoder id requesting for allocation
> * @reqs: proposed use case requirements
> * @lm: proposed layer mixer, function checks if lm, and all other hardwired
> * blocks connected to the lm (pp) is available and appropriate
> @@ -313,7 +301,6 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top)
> */
> static bool _dpu_rm_check_lm_and_get_connected_blks(
> struct dpu_rm *rm,
> - uint32_t enc_id,
> struct dpu_rm_requirements *reqs,
> struct dpu_rm_hw_blk *lm,
> struct dpu_rm_hw_blk **pp,
> @@ -339,13 +326,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks(
> }
> }
>
> - /* Already reserved? */
> - if (RESERVED_BY_OTHER(lm, enc_id)) {
> - DPU_DEBUG("lm %d already reserved\n", lm_cfg->id);
> - return false;
> - }
> -
> - _dpu_rm_init_hw_iter(&iter, 0, DPU_HW_BLK_PINGPONG);
> + _dpu_rm_init_hw_iter(&iter, DPU_HW_BLK_PINGPONG);
> while (_dpu_rm_get_hw_locked(rm, &iter)) {
> if (iter.blk->hw->id == lm_cfg->pingpong) {
> *pp = iter.blk;
> @@ -358,16 +339,10 @@ static bool _dpu_rm_check_lm_and_get_connected_blks(
> return false;
> }
>
> - if (RESERVED_BY_OTHER(*pp, enc_id)) {
> - DPU_DEBUG("lm %d pp %d already reserved\n", lm->hw->id,
> - (*pp)->hw->id);
> - return false;
> - }
> -
> return true;
> }
>
> -static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
> +static int _dpu_rm_reserve_lms(struct dpu_rm *rm,
> struct dpu_crtc_state *dpu_cstate,
> struct dpu_rm_requirements *reqs)
>
> @@ -384,7 +359,7 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
> }
>
> /* Find a primary mixer */
> - _dpu_rm_init_hw_iter(&iter_i, 0, DPU_HW_BLK_LM);
> + _dpu_rm_init_hw_iter(&iter_i, DPU_HW_BLK_LM);
> while (lm_count != reqs->topology.num_lm &&
> _dpu_rm_get_hw_locked(rm, &iter_i)) {
> memset(&lm, 0, sizeof(lm));
> @@ -394,14 +369,14 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
> lm[lm_count] = iter_i.blk;
>
> if (!_dpu_rm_check_lm_and_get_connected_blks(
> - rm, enc_id, reqs, lm[lm_count],
> + rm, reqs, lm[lm_count],
> &pp[lm_count], NULL))
> continue;
>
> ++lm_count;
>
> /* Valid primary mixer found, find matching peers */
> - _dpu_rm_init_hw_iter(&iter_j, 0, DPU_HW_BLK_LM);
> + _dpu_rm_init_hw_iter(&iter_j, DPU_HW_BLK_LM);
>
> while (lm_count != reqs->topology.num_lm &&
> _dpu_rm_get_hw_locked(rm, &iter_j)) {
> @@ -409,7 +384,7 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
> continue;
>
> if (!_dpu_rm_check_lm_and_get_connected_blks(
> - rm, enc_id, reqs, iter_j.blk,
> + rm, reqs, iter_j.blk,
> &pp[lm_count], iter_i.blk))
> continue;
>
> @@ -427,13 +402,13 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
> if (!lm[i])
> break;
>
> - lm[i]->enc_id = enc_id;
> - pp[i]->enc_id = enc_id;
> + lm[i]->in_use = true;
> + pp[i]->in_use = true;
>
> dpu_cstate->mixers[i].hw_lm = to_dpu_hw_mixer(lm[i]->hw);
> dpu_cstate->mixers[i].hw_pp = to_dpu_hw_pingpong(pp[i]->hw);
>
> - trace_dpu_rm_reserve_lms(lm[i]->hw->id, DPU_HW_BLK_LM, enc_id,
> + trace_dpu_rm_reserve_lms(lm[i]->hw->id, DPU_HW_BLK_LM,
> pp[i]->hw->id);
> }
>
> @@ -444,7 +419,6 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id,
>
> static int _dpu_rm_reserve_ctls(
> struct dpu_rm *rm,
> - uint32_t enc_id,
> struct dpu_crtc_state *dpu_cstate,
> const struct msm_display_topology *top)
> {
> @@ -460,15 +434,12 @@ static int _dpu_rm_reserve_ctls(
>
> needs_split_display = _dpu_rm_needs_split_display(top);
>
> - _dpu_rm_init_hw_iter(&iter, 0, DPU_HW_BLK_CTL);
> + _dpu_rm_init_hw_iter(&iter, DPU_HW_BLK_CTL);
> while (_dpu_rm_get_hw_locked(rm, &iter)) {
> const struct dpu_hw_ctl *ctl = to_dpu_hw_ctl(iter.blk->hw);
> unsigned long features = ctl->caps->features;
> bool has_split_display;
>
> - if (RESERVED_BY_OTHER(iter.blk, enc_id))
> - continue;
> -
> has_split_display = BIT(DPU_CTL_SPLIT_DISPLAY) & features;
>
> DPU_DEBUG("ctl %d caps 0x%lX\n", iter.blk->hw->id, features);
> @@ -487,11 +458,10 @@ static int _dpu_rm_reserve_ctls(
> return -ENAVAIL;
>
> for (i = 0; i < ARRAY_SIZE(ctls) && i < num_ctls; i++) {
> - ctls[i]->enc_id = enc_id;
> + ctls[i]->in_use = true;
> dpu_cstate->hw_ctls[i] = to_dpu_hw_ctl(ctls[i]->hw);
>
> - trace_dpu_rm_reserve_ctls(ctls[i]->hw->id, DPU_HW_BLK_CTL,
> - enc_id);
> + trace_dpu_rm_reserve_ctls(ctls[i]->hw->id, DPU_HW_BLK_CTL);
> }
>
> dpu_cstate->num_ctls = num_ctls;
> @@ -501,26 +471,19 @@ static int _dpu_rm_reserve_ctls(
>
> static struct dpu_rm_hw_blk *_dpu_rm_reserve_intf(
> struct dpu_rm *rm,
> - uint32_t enc_id,
> uint32_t id,
> enum dpu_hw_blk_type type)
> {
> struct dpu_rm_hw_iter iter;
>
> /* Find the block entry in the rm, and note the reservation */
> - _dpu_rm_init_hw_iter(&iter, 0, type);
> + _dpu_rm_init_hw_iter(&iter, type);
> while (_dpu_rm_get_hw_locked(rm, &iter)) {
> if (iter.blk->hw->id != id)
> continue;
>
> - if (RESERVED_BY_OTHER(iter.blk, enc_id)) {
> - DPU_ERROR("type %d id %d already reserved\n", type, id);
> - return NULL;
> - }
> + trace_dpu_rm_reserve_intf(iter.blk->hw->id, DPU_HW_BLK_INTF);
>
> - iter.blk->enc_id = enc_id;
> - trace_dpu_rm_reserve_intf(iter.blk->hw->id, DPU_HW_BLK_INTF,
> - enc_id);
> break;
> }
>
> @@ -535,7 +498,6 @@ static struct dpu_rm_hw_blk *_dpu_rm_reserve_intf(
>
> static int _dpu_rm_reserve_intf_related_hw(
> struct dpu_rm *rm,
> - uint32_t enc_id,
> struct dpu_crtc_state *dpu_cstate,
> struct dpu_encoder_hw_resources *hw_res)
> {
> @@ -546,11 +508,12 @@ static int _dpu_rm_reserve_intf_related_hw(
> if (hw_res->intfs[i] == INTF_MODE_NONE)
> continue;
>
> - blk = _dpu_rm_reserve_intf(rm, enc_id, i + INTF_0,
> + blk = _dpu_rm_reserve_intf(rm, i + INTF_0,
> DPU_HW_BLK_INTF);
> if (!blk)
> return -ENAVAIL;
>
> + blk->in_use = true;
> dpu_cstate->hw_intfs[num_intfs++] = to_dpu_hw_intf(blk->hw);
> }
>
> @@ -561,27 +524,24 @@ static int _dpu_rm_reserve_intf_related_hw(
>
> static int _dpu_rm_make_reservation(
> struct dpu_rm *rm,
> - struct drm_encoder *enc,
> struct dpu_crtc_state *dpu_cstate,
> struct dpu_rm_requirements *reqs)
> {
> int ret;
>
> - ret = _dpu_rm_reserve_lms(rm, enc->base.id, dpu_cstate, reqs);
> + ret = _dpu_rm_reserve_lms(rm, dpu_cstate, reqs);
> if (ret) {
> DPU_ERROR("unable to find appropriate mixers\n");
> return ret;
> }
>
> - ret = _dpu_rm_reserve_ctls(rm, enc->base.id, dpu_cstate,
> - &reqs->topology);
> + ret = _dpu_rm_reserve_ctls(rm, dpu_cstate, &reqs->topology);
> if (ret) {
> DPU_ERROR("unable to find appropriate CTL\n");
> return ret;
> }
>
> - ret = _dpu_rm_reserve_intf_related_hw(rm, enc->base.id, dpu_cstate,
> - &reqs->hw_res);
> + ret = _dpu_rm_reserve_intf_related_hw(rm, dpu_cstate, &reqs->hw_res);
> if (ret)
> return ret;
>
> @@ -612,7 +572,7 @@ static int _dpu_rm_release_hw(struct dpu_rm *rm, enum dpu_hw_blk_type type,
>
> list_for_each_entry(blk, &rm->hw_blks[type], list) {
> if (blk->hw->id == id) {
> - blk->enc_id = 0;
> + blk->in_use = false;
> return 0;
> }
> }
> @@ -699,7 +659,7 @@ int dpu_rm_reserve(
> goto end;
> }
>
> - ret = _dpu_rm_make_reservation(rm, enc, dpu_cstate, &reqs);
> + ret = _dpu_rm_make_reservation(rm, dpu_cstate, &reqs);
> if (ret) {
> DPU_ERROR("failed to reserve hw resources: %d\n", ret);
> _dpu_rm_release_reservation(rm, dpu_cstate);
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
> index 636b31b..3061978 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
> @@ -869,48 +869,42 @@
> );
>
> DECLARE_EVENT_CLASS(dpu_rm_iter_template,
> - TP_PROTO(uint32_t id, enum dpu_hw_blk_type type, uint32_t enc_id),
> - TP_ARGS(id, type, enc_id),
> + TP_PROTO(uint32_t id, enum dpu_hw_blk_type type),
> + TP_ARGS(id, type),
> TP_STRUCT__entry(
> __field( uint32_t, id )
> __field( enum dpu_hw_blk_type, type )
> - __field( uint32_t, enc_id )
> ),
> TP_fast_assign(
> __entry->id = id;
> __entry->type = type;
> - __entry->enc_id = enc_id;
> ),
> - TP_printk("id:%d type:%d enc_id:%u", __entry->id, __entry->type,
> - __entry->enc_id)
> + TP_printk("id:%d type:%d ", __entry->id, __entry->type)
> );
> DEFINE_EVENT(dpu_rm_iter_template, dpu_rm_reserve_intf,
> - TP_PROTO(uint32_t id, enum dpu_hw_blk_type type, uint32_t enc_id),
> - TP_ARGS(id, type, enc_id)
> + TP_PROTO(uint32_t id, enum dpu_hw_blk_type type),
> + TP_ARGS(id, type)
> );
> DEFINE_EVENT(dpu_rm_iter_template, dpu_rm_reserve_ctls,
> - TP_PROTO(uint32_t id, enum dpu_hw_blk_type type, uint32_t enc_id),
> - TP_ARGS(id, type, enc_id)
> + TP_PROTO(uint32_t id, enum dpu_hw_blk_type type),
> + TP_ARGS(id, type)
> );
>
> TRACE_EVENT(dpu_rm_reserve_lms,
> - TP_PROTO(uint32_t id, enum dpu_hw_blk_type type, uint32_t enc_id,
> - uint32_t pp_id),
> - TP_ARGS(id, type, enc_id, pp_id),
> + TP_PROTO(uint32_t id, enum dpu_hw_blk_type type, uint32_t pp_id),
> + TP_ARGS(id, type, pp_id),
> TP_STRUCT__entry(
> __field( uint32_t, id )
> __field( enum dpu_hw_blk_type, type )
> - __field( uint32_t, enc_id )
> __field( uint32_t, pp_id )
> ),
> TP_fast_assign(
> __entry->id = id;
> __entry->type = type;
> - __entry->enc_id = enc_id;
> __entry->pp_id = pp_id;
> ),
> - TP_printk("id:%d type:%d enc_id:%u pp_id:%u", __entry->id,
> - __entry->type, __entry->enc_id, __entry->pp_id)
> + TP_printk("id:%d type:%d pp_id:%u", __entry->id,
> + __entry->type, __entry->pp_id)
> );
>
> TRACE_EVENT(dpu_vbif_wait_xin_halt_fail,
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

--
Sean Paul, Software Engineer, Google / Chromium OS
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