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Date: Tue, 11 Jul 2023 17:49:28 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
<freedreno@...ts.freedesktop.org>, Rob Clark <robdclark@...il.com>,
Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>,
"David Airlie" <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
CC: <dri-devel@...ts.freedesktop.org>, <quic_jesszhan@...cinc.com>,
<andersson@...nel.org>, <linux-arm-msm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/4] drm/msm/dpu: rename enable_compression() to
program_intf_cmd_cfg()
On 7/11/2023 5:42 PM, Dmitry Baryshkov wrote:
> On 12/07/2023 03:33, Abhinav Kumar wrote:
>> Rename the intf's enable_compression() op to program_intf_cmd_cfg()
>> and allow it to accept a struct intf_cmd_mode_cfg to program
>> all the bits at once. This can be re-used by widebus later on as
>> well as it touches the same register.
>>
>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> ---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 8 ++++++--
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 8 +++++---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h | 11 +++++++++--
>> 3 files changed, 20 insertions(+), 7 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 b856c6286c85..052824eac9f3 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
>> @@ -50,6 +50,7 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>> to_dpu_encoder_phys_cmd(phys_enc);
>> struct dpu_hw_ctl *ctl;
>> struct dpu_hw_intf_cfg intf_cfg = { 0 };
>> + struct intf_cmd_mode_cfg cmd_mode_cfg = {};
>> ctl = phys_enc->hw_ctl;
>> if (!ctl->ops.setup_intf_cfg)
>> @@ -68,8 +69,11 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>> phys_enc->hw_intf,
>> phys_enc->hw_pp->idx);
>> - if (intf_cfg.dsc != 0 && phys_enc->hw_intf->ops.enable_compression)
>> - phys_enc->hw_intf->ops.enable_compression(phys_enc->hw_intf);
>> + if (intf_cfg.dsc != 0)
>> + cmd_mode_cfg.data_compress = true;
>> +
>> + if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
>> +
>> phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf,
>> &cmd_mode_cfg);
>> }
>> static void dpu_encoder_phys_cmd_pp_tx_done_irq(void *arg, int irq_idx)
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> index d766791438e7..7323c713dad1 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> @@ -513,11 +513,13 @@ static void
>> dpu_hw_intf_disable_autorefresh(struct dpu_hw_intf *intf,
>> }
>> -static void dpu_hw_intf_enable_compression(struct dpu_hw_intf *ctx)
>> +static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
>> + struct intf_cmd_mode_cfg *cmd_mode_cfg)
>> {
>> u32 intf_cfg2 = DPU_REG_READ(&ctx->hw, INTF_CONFIG2);
>> - intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
>> + if (cmd_mode_cfg->data_compress)
>> + intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
>> DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
>> }
>> @@ -544,7 +546,7 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops
>> *ops,
>> }
>> if (mdss_rev->core_major_ver >= 7)
>> - ops->enable_compression = dpu_hw_intf_enable_compression;
>> + ops->program_intf_cmd_cfg = dpu_hw_intf_program_intf_cmd_cfg;
>> }
>> struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> index 3b5f18dbcb4b..c15f4973de5e 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> @@ -48,6 +48,11 @@ struct intf_status {
>> u32 line_count; /* current line count including blanking */
>> };
>> +struct intf_cmd_mode_cfg {
>
> My first reaction was that usually all DPU structure names start with
> dpu_. Then I discovered that dpu_hw_intf.h diverges from this useful
> custom. Could you please: fix existing structure struct intf_* names to
> bear the dpu_ prefix. Then this structure can also be named as struct
> dpu_intf_cmd_mode_cfg.
>
Yeah I thought so too .... Ok, I can clean that up in this series and
rename this.
Ack on the below comments.
>> + u8 data_compress; /* enable data compress between dpu and dsi */
>> + /* can be expanded for other programmable bits */
>
> Please drop this comment.
>
>> +};
>> +
>> /**
>> * struct dpu_hw_intf_ops : Interface to the interface Hw driver
>> functions
>> * Assumption is these functions will be called after clocks are
>> enabled
>> @@ -70,7 +75,7 @@ struct intf_status {
>> * @get_autorefresh: Retrieve autorefresh config from
>> hardware
>> * Return: 0 on success, -ETIMEDOUT on
>> timeout
>> * @vsync_sel: Select vsync signal for tear-effect
>> configuration
>> - * @enable_compression: Enable data compression
>> + * @program_intf_cmd_cfg: Program the DPU to interface datapath
>> for command mode
>> */
>> struct dpu_hw_intf_ops {
>> void (*setup_timing_gen)(struct dpu_hw_intf *intf,
>> @@ -108,7 +113,9 @@ struct dpu_hw_intf_ops {
>> */
>> void (*disable_autorefresh)(struct dpu_hw_intf *intf, uint32_t
>> encoder_id, u16 vdisplay);
>> - void (*enable_compression)(struct dpu_hw_intf *intf);
>> + // Program the datapath between DPU and intf for command mode
>
> We have been using c99 comments in the code, Moreover, there is already
> description for this field in the comment above, so it can be dropped too.
>
>> + void (*program_intf_cmd_cfg)(struct dpu_hw_intf *intf,
>> + struct intf_cmd_mode_cfg *cmd_mode_cfg);
>> };
>> struct dpu_hw_intf {
>
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