[Freedreno] [PATCH v2 1/7] drm/msm/dpu: use feature bit for LM combined alpha check

[Dmitry Baryshkov]

On Thu, 2 Jun 2022 at 21:37, Abhinav Kumar <quic_abhinavk at quicinc.com> wrote:
>
>
>
> On 6/2/2022 6:30 AM, Dmitry Baryshkov wrote:
> > Rather than checking hwversion, follow the usual patter and add special
> > bit to the lm->features to check whether the LM has combined or separate
> > alpha registers. While we are at it, rename
> > dpu_hw_lm_setup_blend_config_sdm845() to
> > dpu_hw_lm_setup_blend_config_combined_alpha().
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> > ---
> >   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 17 ++++++++++-------
> >   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h |  2 ++
> >   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c      |  6 +++---
> >   3 files changed, 15 insertions(+), 10 deletions(-)
> >
> > 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 400ebceb56bb..78c7d987c2ca 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> > @@ -50,9 +50,12 @@
> >   #define DMA_CURSOR_MSM8998_MASK \
> >       (DMA_MSM8998_MASK | BIT(DPU_SSPP_CURSOR))
> >
> > -#define MIXER_SDM845_MASK \
> > +#define MIXER_MSM8998_MASK \
> >       (BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER))
> >
> > +#define MIXER_SDM845_MASK \
> > +     (BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER) | BIT(DPU_MIXER_COMBINED_ALPHA))
> > +
> >   #define MIXER_SC7180_MASK \
> >       (BIT(DPU_DIM_LAYER))
> >
> > @@ -936,17 +939,17 @@ static const struct dpu_lm_sub_blks msm8998_lm_sblk = {
> >   };
> >
> >   static const struct dpu_lm_cfg msm8998_lm[] = {
> > -     LM_BLK("lm_0", LM_0, 0x44000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_0", LM_0, 0x44000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_0, LM_2, DSPP_0),
> > -     LM_BLK("lm_1", LM_1, 0x45000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_1", LM_1, 0x45000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_1, LM_5, DSPP_1),
> > -     LM_BLK("lm_2", LM_2, 0x46000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_2", LM_2, 0x46000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_2, LM_0, 0),
> > -     LM_BLK("lm_3", LM_3, 0x47000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_3", LM_3, 0x47000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
> > -     LM_BLK("lm_4", LM_4, 0x48000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_4", LM_4, 0x48000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
> > -     LM_BLK("lm_5", LM_5, 0x49000, MIXER_SDM845_MASK,
> > +     LM_BLK("lm_5", LM_5, 0x49000, MIXER_MSM8998_MASK,
> >               &msm8998_lm_sblk, PINGPONG_3, LM_1, 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 8cb6d1f25bf9..80bc09b1f1b3 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> > @@ -145,6 +145,7 @@ enum {
> >    * @DPU_MIXER_SOURCESPLIT     Layer mixer supports source-split configuration
> >    * @DPU_MIXER_GC              Gamma correction block
> >    * @DPU_DIM_LAYER             Layer mixer supports dim layer
> > + * @DPU_MIXER_COMBINED_ALPHA  Layer mixer has combined alpha register
> >    * @DPU_MIXER_MAX             maximum value
> >    */
> >   enum {
> > @@ -152,6 +153,7 @@ enum {
> >       DPU_MIXER_SOURCESPLIT,
> >       DPU_MIXER_GC,
> >       DPU_DIM_LAYER,
> > +     DPU_MIXER_COMBINED_ALPHA,
> >       DPU_MIXER_MAX
> >   };
> >
> > 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 462f5082099e..25d2eba28e71 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> > @@ -148,7 +148,7 @@ static int dpu_hw_lm_collect_misr(struct dpu_hw_mixer *ctx, u32 *misr_value)
> >       return 0;
> >   }
> >
> > -static void dpu_hw_lm_setup_blend_config_sdm845(struct dpu_hw_mixer *ctx,
> > +static void dpu_hw_lm_setup_blend_config_combined_alpha(struct dpu_hw_mixer *ctx,
> >       u32 stage, u32 fg_alpha, u32 bg_alpha, u32 blend_op)
> >   {
> >       struct dpu_hw_blk_reg_map *c = &ctx->hw;
> > @@ -204,8 +204,8 @@ static void _setup_mixer_ops(const struct dpu_mdss_cfg *m,
> >               unsigned long features)
> >   {
> >       ops->setup_mixer_out = dpu_hw_lm_setup_out;
> > -     if (m->hwversion >= DPU_HW_VER_400)
> > -             ops->setup_blend_config = dpu_hw_lm_setup_blend_config_sdm845;
> > +     if (test_bit(DPU_MIXER_COMBINED_ALPHA, &features))
> > +             ops->setup_blend_config = dpu_hw_lm_setup_blend_config_combined_alpha;
>
> This will not work for all chipsets.
>
> In the catalog you have added BIT(DPU_MIXER_COMBINED_ALPHA) only for
> MIXER_SDM845_MASK but MIXER_SC7180_MASK is not updated.
>
> HW version of sc7180 is > DPU_HW_VER_400 so this would break both sc7180
> and sc7280.
>
> Please update all the relevant chipset masks.

Argh, I missed the fact that the sc7180 mixer mask doesn't inherit the
sdm845 one.
BTW: I see that atoll-sde declares support for src-split. Is there any
reason why it is omitted from sc7180's mixer mask?
If there is one, could you please send a patch adding a short comment there?

>
> >       else
> >               ops->setup_blend_config = dpu_hw_lm_setup_blend_config;
> >       ops->setup_alpha_out = dpu_hw_lm_setup_color3;

-- 
With best wishes
Dmitry