linux-kernel - Re: [PATCH v2 1/2] drm/msm/dpu: Set input

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Message-ID: <CAA8EJpqr0akUZoDYR1Q2+WBC4vvAgp_xfjBSq2ZTuoS4HLxnUQ@mail.gmail.com>
Date:   Wed, 13 Dec 2023 23:20:18 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Jessica Zhang <quic_jesszhan@...cinc.com>
Cc:     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>, quic_abhinavk@...cinc.com,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] drm/msm/dpu: Set input_sel bit for INTF

On Wed, 13 Dec 2023 at 22:51, Jessica Zhang <quic_jesszhan@...cinc.com> wrote:
>
> Set the input_sel bit for encoders as it was missed in the initial
> implementation.
>
> Reported-by: Rob Clark <robdclark@...il.com>
> Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/39
> Fixes: 91143873a05d ("drm/msm/dpu: Add MISR register support for interface")
> Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c |  2 +-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c   |  2 +-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c | 10 ++++++++--
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h |  3 ++-
>  4 files changed, 12 insertions(+), 5 deletions(-)
>
> 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 0b6a0a7dcc39..226133af7840 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> @@ -322,7 +322,7 @@ static u32 dpu_hw_intf_get_line_count(struct dpu_hw_intf *intf)
>
>  static void dpu_hw_intf_setup_misr(struct dpu_hw_intf *intf, bool enable, u32 frame_count)
>  {
> -       dpu_hw_setup_misr(&intf->hw, INTF_MISR_CTRL, enable, frame_count);
> +       dpu_hw_setup_misr(&intf->hw, INTF_MISR_CTRL, enable, frame_count, 0x1);
>  }
>
>  static int dpu_hw_intf_collect_misr(struct dpu_hw_intf *intf, u32 *misr_value)
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> index 25af52ab602f..bbc9756ecde9 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> @@ -85,7 +85,7 @@ static void dpu_hw_lm_setup_border_color(struct dpu_hw_mixer *ctx,
>
>  static void dpu_hw_lm_setup_misr(struct dpu_hw_mixer *ctx, bool enable, u32 frame_count)
>  {
> -       dpu_hw_setup_misr(&ctx->hw, LM_MISR_CTRL, enable, frame_count);
> +       dpu_hw_setup_misr(&ctx->hw, LM_MISR_CTRL, enable, frame_count, 0x0);
>  }
>
>  static int dpu_hw_lm_collect_misr(struct dpu_hw_mixer *ctx, u32 *misr_value)
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
> index 0b05061e3e62..87716a60332e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
> @@ -477,7 +477,8 @@ void _dpu_hw_setup_qos_lut(struct dpu_hw_blk_reg_map *c, u32 offset,
>
>  void dpu_hw_setup_misr(struct dpu_hw_blk_reg_map *c,
>                 u32 misr_ctrl_offset,
> -               bool enable, u32 frame_count)
> +               bool enable, u32 frame_count,
> +               u32 input_sel)
>  {
>         u32 config = 0;
>
> @@ -487,8 +488,13 @@ void dpu_hw_setup_misr(struct dpu_hw_blk_reg_map *c,
>         wmb();
>
>         if (enable) {
> +               /*
> +                * note: Aside from encoders, input_sel should be
> +                * set to 0x0 by default
> +                */

Even if it is not a proper kernedoc, please move this comment before
the function.

>                 config = (frame_count & MISR_FRAME_COUNT_MASK) |
> -                       MISR_CTRL_ENABLE | MISR_CTRL_FREE_RUN_MASK;
> +                       MISR_CTRL_ENABLE | MISR_CTRL_FREE_RUN_MASK |
> +                       ((input_sel & 0xF) << 24);
>
>                 DPU_REG_WRITE(c, misr_ctrl_offset, config);
>         } else {
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
> index fe083b2e5696..761056be272b 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
> @@ -357,7 +357,8 @@ void _dpu_hw_setup_qos_lut(struct dpu_hw_blk_reg_map *c, u32 offset,
>  void dpu_hw_setup_misr(struct dpu_hw_blk_reg_map *c,
>                 u32 misr_ctrl_offset,
>                 bool enable,
> -               u32 frame_count);
> +               u32 frame_count,
> +               u32 input_sel);
>
>  int dpu_hw_collect_misr(struct dpu_hw_blk_reg_map *c,
>                 u32 misr_ctrl_offset,
>
> --
> 2.43.0
>


-- 
With best wishes
Dmitry