Re: [PATCH] drm/msm/dpu: Fix encoder CRC to account for CTM enablement

From: Dmitry Baryshkov
Date: Mon Oct 23 2023 - 18:30:27 EST

On Tue, 24 Oct 2023 at 01:12, Rob Clark <robdclark@xxxxxxxxx> wrote:
>
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> Seems like we need to pick INPUT_SEL=1 when CTM is enabled. But not
> otherwise.
>
> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 ++--
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 3 ++-
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 4 ++--
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h | 2 +-
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c | 2 +-
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c | 5 ++++-
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h | 3 ++-
> 8 files changed, 15 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index 2b83a13b3aa9..d93a92ffd5df 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -134,7 +134,7 @@ static void dpu_crtc_setup_encoder_misr(struct drm_crtc *crtc)
> struct drm_encoder *drm_enc;
>
> drm_for_each_encoder_mask(drm_enc, crtc->dev, crtc->state->encoder_mask)
> - dpu_encoder_setup_misr(drm_enc);
> + dpu_encoder_setup_misr(drm_enc, !!crtc->state->ctm);
> }
>
> static int dpu_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index b0a7908418ed..12ee7acb5ea6 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -241,7 +241,7 @@ int dpu_encoder_get_crc_values_cnt(const struct drm_encoder *drm_enc)
> return num_intf;
> }
>
> -void dpu_encoder_setup_misr(const struct drm_encoder *drm_enc)
> +void dpu_encoder_setup_misr(const struct drm_encoder *drm_enc, bool has_ctm)
> {
> struct dpu_encoder_virt *dpu_enc;
>
> @@ -255,7 +255,7 @@ void dpu_encoder_setup_misr(const struct drm_encoder *drm_enc)
> if (!phys->hw_intf || !phys->hw_intf->ops.setup_misr)
> continue;
>
> - phys->hw_intf->ops.setup_misr(phys->hw_intf, true, 1);
> + phys->hw_intf->ops.setup_misr(phys->hw_intf, true, 1, has_ctm);
> }
> }
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> index 4c05fd5e9ed1..510783b2fb24 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> @@ -169,8 +169,9 @@ int dpu_encoder_get_crc_values_cnt(const struct drm_encoder *drm_enc);
> /**
> * dpu_encoder_setup_misr - enable misr calculations
> * @drm_enc: Pointer to previously created drm encoder structure
> + * @has_ctm: Is CTM enabled
> */
> -void dpu_encoder_setup_misr(const struct drm_encoder *drm_encoder);
> +void dpu_encoder_setup_misr(const struct drm_encoder *drm_encoder, bool has_ctm);
>
> /**
> * dpu_encoder_get_crc - get the crc value from interface blocks
> 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 e8b8908d3e12..cb06f80cc671 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> @@ -318,9 +318,9 @@ static u32 dpu_hw_intf_get_line_count(struct dpu_hw_intf *intf)
> return DPU_REG_READ(c, INTF_LINE_COUNT);
> }
>
> -static void dpu_hw_intf_setup_misr(struct dpu_hw_intf *intf, bool enable, u32 frame_count)
> +static void dpu_hw_intf_setup_misr(struct dpu_hw_intf *intf, bool enable, u32 frame_count, bool has_ctm)
> {
> - dpu_hw_setup_misr(&intf->hw, INTF_MISR_CTRL, enable, frame_count);
> + dpu_hw_setup_misr(&intf->hw, INTF_MISR_CTRL, enable, frame_count, has_ctm);

I'm not sure about the dpu_encoder and dpu_hw_intf interfaces. But
dpu_hw_setup_misr definitely needs the `u8 input_sel` parameter
instead of `bool has_ctm`.
Most likely, I'd use u8 for dpu_hw_intf operation too.

Could you please adjust?

> }
>
> 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_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
> index c539025c418b..95aafc4cf58e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
> @@ -95,7 +95,7 @@ struct dpu_hw_intf_ops {
>
> void (*bind_pingpong_blk)(struct dpu_hw_intf *intf,
> const enum dpu_pingpong pp);
> - void (*setup_misr)(struct dpu_hw_intf *intf, bool enable, u32 frame_count);
> + void (*setup_misr)(struct dpu_hw_intf *intf, bool enable, u32 frame_count, bool has_ctm);
> int (*collect_misr)(struct dpu_hw_intf *intf, u32 *misr_value);
>
> // Tearcheck on INTF since DPU 5.0.0
> 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 d1c3bd8379ea..2efe29396c6a 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> @@ -83,7 +83,7 @@ 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, false);
> }
>
> 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 9d2273fd2fed..528b8439209f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
> @@ -483,7 +483,7 @@ 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, bool has_ctm)
> {
> u32 config = 0;
>
> @@ -496,6 +496,9 @@ void dpu_hw_setup_misr(struct dpu_hw_blk_reg_map *c,
> config = (frame_count & MISR_FRAME_COUNT_MASK) |
> MISR_CTRL_ENABLE | MISR_CTRL_FREE_RUN_MASK;
>
> + if (!has_ctm)
> + config |= 1 << 24;

Please define MISR_CTRL_INPUT_SEL instead.

> +
> DPU_REG_WRITE(c, misr_ctrl_offset, config);
> } else {
> DPU_REG_WRITE(c, misr_ctrl_offset, 0);
> 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 1f6079f47071..e42d9d00e40e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
> @@ -360,7 +360,8 @@ 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,
> + bool has_ctm);
>
> int dpu_hw_collect_misr(struct dpu_hw_blk_reg_map *c,
> u32 misr_ctrl_offset,
> --
> 2.41.0
>


--
With best wishes
Dmitry