>-----Original Message-----
>From: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
>Sent: Tuesday, November 1, 2022 5:13 PM
>To: Kalyan Thota (QUIC) <quic_kalyant@xxxxxxxxxxx>
>Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-arm-msm@xxxxxxxxxxxxxxx;
>freedreno@xxxxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-
>kernel@xxxxxxxxxxxxxxx; robdclark@xxxxxxxxx; dianders@xxxxxxxxxxxx;
>swboyd@xxxxxxxxxxxx; Vinod Polimera (QUIC) <quic_vpolimer@xxxxxxxxxxx>;
>dmitry.baryshkov@xxxxxxxxxx; Abhinav Kumar (QUIC)
><quic_abhinavk@xxxxxxxxxxx>
>Subject: Re: [v7] drm/msm/disp/dpu1: add support for dspp sub block flush in
>sc7280
>
>WARNING: This email originated from outside of Qualcomm. Please be wary of
>any links or attachments, and do not enable macros.
>
>On 2022-11-01 03:57:05, Kalyan Thota wrote:
>> Flush mechanism for DSPP blocks has changed in sc7280 family, it
>> allows individual sub blocks to be flushed in coordination with master
>> flush control.
>>
>> Representation: master_flush && (PCC_flush | IGC_flush .. etc )
>>
>> This change adds necessary support for the above design.
>>
>> Changes in v1:
>> - Few nits (Doug, Dmitry)
>> - Restrict sub-block flush programming to dpu_hw_ctl file (Dmitry)
>>
>> Changes in v2:
>> - Move the address offset to flush macro (Dmitry)
>> - Seperate ops for the sub block flush (Dmitry)
>>
>> Changes in v3:
>> - Reuse the DPU_DSPP_xx enum instead of a new one (Dmitry)
>>
>> Changes in v4:
>> - Use shorter version for unsigned int (Stephen)
>>
>> Changes in v5:
>> - Spurious patch please ignore.
>>
>> Changes in v6:
>> - Add SOB tag (Doug, Dmitry)
>>
>> Changes in v7:
>> - Cache flush mask per dspp (Dmitry)
>> - Few nits (Marijn)
>
>Thanks, but it seems like you skipped some of them. I'll point them out again this
>time, including some new formatting issues.
>
>>
>> Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx>
>> ---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 5 ++-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 4 +++
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c | 46
>++++++++++++++++++++++++--
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h | 7 ++--
>> 5 files changed, 58 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
>> index 601d687..4170fbe 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
>> @@ -766,7 +766,7 @@ static void _dpu_crtc_setup_cp_blocks(struct
>> drm_crtc *crtc)
>>
>> /* stage config flush mask */
>> ctl->ops.update_pending_flush_dspp(ctl,
>> - mixer[i].hw_dspp->idx);
>> + mixer[i].hw_dspp->idx, DPU_DSPP_PCC);
>> }
>> }
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> index 27f029f..0eecb2f 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> @@ -65,7 +65,10 @@
>> (PINGPONG_SDM845_MASK | BIT(DPU_PINGPONG_TE2))
>>
>> #define CTL_SC7280_MASK \
>> - (BIT(DPU_CTL_ACTIVE_CFG) | BIT(DPU_CTL_FETCH_ACTIVE) |
>BIT(DPU_CTL_VM_CFG))
>> + (BIT(DPU_CTL_ACTIVE_CFG) | \
>> + BIT(DPU_CTL_FETCH_ACTIVE) | \
>> + BIT(DPU_CTL_VM_CFG) | \
>> + BIT(DPU_CTL_DSPP_SUB_BLOCK_FLUSH))
>>
>> #define MERGE_3D_SM8150_MASK (0)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> index 38aa38a..8148e91 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> @@ -161,10 +161,12 @@ enum {
>> * DSPP sub-blocks
>> * @DPU_DSPP_PCC Panel color correction block
>> * @DPU_DSPP_GC Gamma correction block
>> + * @DPU_DSPP_IGC Inverse Gamma correction block
>
>Here.
>
>> */
>> enum {
>> DPU_DSPP_PCC = 0x1,
>> DPU_DSPP_GC,
>> + DPU_DSPP_IGC,
>> DPU_DSPP_MAX
>> };
>>
>> @@ -191,6 +193,7 @@ enum {
>> * @DPU_CTL_SPLIT_DISPLAY: CTL supports video mode split display
>> * @DPU_CTL_FETCH_ACTIVE: Active CTL for fetch HW (SSPPs)
>> * @DPU_CTL_VM_CFG: CTL config to support multiple VMs
>> + * @DPU_CTL_DSPP_BLOCK_FLUSH: CTL config to support dspp sub-block
>> + flush
>
>I even overlooked this in my review: all docs use spaces except these use tabs...
>Yet you use spaces here and didn't even align the text.
>
>Either use tabs in the line you add here, or replace the rest with spaces and align
>them again.
>
>> * @DPU_CTL_MAX
>> */
>> enum {
>> @@ -198,6 +201,7 @@ enum {
>> DPU_CTL_ACTIVE_CFG,
>> DPU_CTL_FETCH_ACTIVE,
>> DPU_CTL_VM_CFG,
>> + DPU_CTL_DSPP_SUB_BLOCK_FLUSH,
>> DPU_CTL_MAX
>> };
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
>> index a35ecb6..fbcb7da 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
>> @@ -33,6 +33,7 @@
>> #define CTL_INTF_FLUSH 0x110
>> #define CTL_INTF_MASTER 0x134
>> #define CTL_FETCH_PIPE_ACTIVE 0x0FC
>> +#define CTL_DSPP_n_FLUSH(n) ((0x13C) + ((n) * 4))
>
>Here.
>
>>
>> #define CTL_MIXER_BORDER_OUT BIT(24)
>> #define CTL_FLUSH_MASK_CTL BIT(17)
>> @@ -110,9 +111,14 @@ static inline void
>> dpu_hw_ctl_trigger_pending(struct dpu_hw_ctl *ctx)
>>
>> static inline void dpu_hw_ctl_clear_pending_flush(struct dpu_hw_ctl
>> *ctx) {
>> + int i;
>> +
>> trace_dpu_hw_ctl_clear_pending_flush(ctx->pending_flush_mask,
>> dpu_hw_ctl_get_flush_register(ctx));
>> ctx->pending_flush_mask = 0x0;
>> +
>> + for(i = 0; i < ARRAY_SIZE(ctx->pending_dspp_flush_mask); i++)
>> + ctx->pending_dspp_flush_mask[i] = 0x0;
>
>Any idea why the other `pending_xxx_flush_mask`s aren't cleared here?
>
Thank you for your comments Marijn. Other pending flushes are also need to be cleared; however I didn't want to include them in this patch, will post another change clearing the cached flush bits for other HW blocks.
Will wait for more comments on V7 and then will post V8 addressing your comments.
>> }
>>
>> static inline void dpu_hw_ctl_update_pending_flush(struct dpu_hw_ctl
>> *ctx, @@ -130,6 +136,8 @@ static u32
>> dpu_hw_ctl_get_pending_flush(struct dpu_hw_ctl *ctx)
>>
>> static inline void dpu_hw_ctl_trigger_flush_v1(struct dpu_hw_ctl
>> *ctx) {
>> + int i;
>> +
>> if (ctx->pending_flush_mask & BIT(MERGE_3D_IDX))
>> DPU_REG_WRITE(&ctx->hw, CTL_MERGE_3D_FLUSH,
>> ctx->pending_merge_3d_flush_mask);
>> @@ -140,6 +148,11 @@ static inline void dpu_hw_ctl_trigger_flush_v1(struct
>dpu_hw_ctl *ctx)
>> DPU_REG_WRITE(&ctx->hw, CTL_WB_FLUSH,
>> ctx->pending_wb_flush_mask);
>>
>> + for(i = 0; i < ARRAY_SIZE(ctx->pending_dspp_flush_mask); i++)
>> + if (ctx->pending_dspp_flush_mask[i])
>> + DPU_REG_WRITE(&ctx->hw, CTL_DSPP_n_FLUSH(i),
>> + ctx->pending_dspp_flush_mask[i]);
>> +
>> DPU_REG_WRITE(&ctx->hw, CTL_FLUSH, ctx->pending_flush_mask); }
>>
>> @@ -287,8 +300,9 @@ static void
>> dpu_hw_ctl_update_pending_flush_merge_3d_v1(struct dpu_hw_ctl *ctx, }
>>
>> static void dpu_hw_ctl_update_pending_flush_dspp(struct dpu_hw_ctl *ctx,
>> - enum dpu_dspp dspp)
>> + enum dpu_dspp dspp, u32 dspp_sub_blk)
>> {
>> +
>> switch (dspp) {
>> case DSPP_0:
>> ctx->pending_flush_mask |= BIT(13); @@ -307,6 +321,30 @@
>> static void dpu_hw_ctl_update_pending_flush_dspp(struct dpu_hw_ctl *ctx,
>> }
>> }
>>
>> +static void dpu_hw_ctl_update_pending_flush_dspp_subblocks(
>> + struct dpu_hw_ctl *ctx, enum dpu_dspp dspp, u32 dspp_sub_blk) {
>> +
>> + if (dspp >= DSPP_MAX)
>> + return;
>> +
>> + switch (dspp_sub_blk) {
>> + case DPU_DSPP_IGC:
>> + ctx->pending_dspp_flush_mask[dspp-DSPP_0] |= BIT(2);
>
>Spaces around -, here and below.
>
>- Marijn
>
>> + break;
>> + case DPU_DSPP_PCC:
>> + ctx->pending_dspp_flush_mask[dspp-DSPP_0] |= BIT(4);
>> + break;
>> + case DPU_DSPP_GC:
>> + ctx->pending_dspp_flush_mask[dspp-DSPP_0] |= BIT(5);
>> + break;
>> + default:
>> + return;
>> + }
>> +
>> + ctx->pending_flush_mask |= BIT(29); }
>> +
>> static u32 dpu_hw_ctl_poll_reset_status(struct dpu_hw_ctl *ctx, u32
>> timeout_us) {
>> struct dpu_hw_blk_reg_map *c = &ctx->hw; @@ -675,7 +713,11 @@
>> static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
>> ops->setup_blendstage = dpu_hw_ctl_setup_blendstage;
>> ops->update_pending_flush_sspp =
>dpu_hw_ctl_update_pending_flush_sspp;
>> ops->update_pending_flush_mixer =
>dpu_hw_ctl_update_pending_flush_mixer;
>> - ops->update_pending_flush_dspp =
>dpu_hw_ctl_update_pending_flush_dspp;
>> + if (cap & BIT(DPU_CTL_DSPP_SUB_BLOCK_FLUSH))
>> + ops->update_pending_flush_dspp =
>dpu_hw_ctl_update_pending_flush_dspp_subblocks;
>> + else
>> + ops->update_pending_flush_dspp =
>> + dpu_hw_ctl_update_pending_flush_dspp;
>> +
>> if (cap & BIT(DPU_CTL_FETCH_ACTIVE))
>> ops->set_active_pipes =
>> dpu_hw_ctl_set_fetch_pipe_active; }; diff --git
>> a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
>> index 96c012e..ff4e92c 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
>> @@ -148,13 +148,15 @@ struct dpu_hw_ctl_ops {
>> enum dpu_lm blk);
>>
>> /**
>> - * OR in the given flushbits to the cached pending_flush_mask
>> + * OR in the given flushbits to the cached
>> + pending_dspp_flush_mask
>> * No effect on hardware
>> * @ctx : ctl path ctx pointer
>> * @blk : DSPP block index
>> + * @dspp_sub_blk : DSPP sub-block index
>> */
>> void (*update_pending_flush_dspp)(struct dpu_hw_ctl *ctx,
>> - enum dpu_dspp blk);
>> + enum dpu_dspp blk, u32 dspp_sub_blk);
>> +
>> /**
>> * Write the value of the pending_flush_mask to hardware
>> * @ctx : ctl path ctx pointer
>> @@ -242,6 +244,7 @@ struct dpu_hw_ctl {
>> u32 pending_intf_flush_mask;
>> u32 pending_wb_flush_mask;
>> u32 pending_merge_3d_flush_mask;
>> + u32 pending_dspp_flush_mask[DSPP_MAX - DSPP_0];
>>
>> /* ops */
>> struct dpu_hw_ctl_ops ops;
>> --
>> 2.7.4
>>
