| Message ID | 20230329-rfc-msm-dsc-helper-v1-3-f3e479f59b6d@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Introduce MSM-specific DSC helpers | expand |
On 3/29/2023 4:31 PM, Dmitry Baryshkov wrote: > On 30/03/2023 02:18, Jessica Zhang wrote: >> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> >> --- >> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 4 +++- >> 1 file changed, 3 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >> index 619926da1441..648c530b5d05 100644 >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >> @@ -3,6 +3,8 @@ >> * Copyright (c) 2020-2022, Linaro Limited >> */ >> +#include <drm/display/drm_dsc_helper.h> >> + >> #include "dpu_kms.h" >> #include "dpu_hw_catalog.h" >> #include "dpu_hwio.h" >> @@ -102,7 +104,7 @@ static void dpu_hw_dsc_config(struct dpu_hw_dsc >> *hw_dsc, >> data |= dsc->final_offset; >> DPU_REG_WRITE(c, DSC_DSC_OFFSET, data); >> - det_thresh_flatness = 7 + 2 * (dsc->bits_per_component - 8); >> + det_thresh_flatness = drm_dsc_calculate_det_thresh_flatness(dsc); > > But this changes the value! Compare: > > bpc | old | new > 8 | 7 | 2 > 10 | 11 | 8 > 12 | 15 | 256 > > If this is intentional, please state so and maybe add a Fixes tag. Hi Dmitry, Yep this was intentional to match downstream and the spec. Will add a fixes tag for this. Thanks, Jessica Zhang > > >> data = det_thresh_flatness << 10; >> data |= dsc->flatness_max_qp << 5; >> data |= dsc->flatness_min_qp; >> > > -- > With best wishes > Dmitry >
On 30/03/2023 02:45, Jessica Zhang wrote: > > > On 3/29/2023 4:31 PM, Dmitry Baryshkov wrote: >> On 30/03/2023 02:18, Jessica Zhang wrote: >>> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> >>> --- >>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 4 +++- >>> 1 file changed, 3 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >>> index 619926da1441..648c530b5d05 100644 >>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c >>> @@ -3,6 +3,8 @@ >>> * Copyright (c) 2020-2022, Linaro Limited >>> */ >>> +#include <drm/display/drm_dsc_helper.h> >>> + >>> #include "dpu_kms.h" >>> #include "dpu_hw_catalog.h" >>> #include "dpu_hwio.h" >>> @@ -102,7 +104,7 @@ static void dpu_hw_dsc_config(struct dpu_hw_dsc >>> *hw_dsc, >>> data |= dsc->final_offset; >>> DPU_REG_WRITE(c, DSC_DSC_OFFSET, data); >>> - det_thresh_flatness = 7 + 2 * (dsc->bits_per_component - 8); >>> + det_thresh_flatness = drm_dsc_calculate_det_thresh_flatness(dsc); >> >> But this changes the value! Compare: >> >> bpc | old | new >> 8 | 7 | 2 >> 10 | 11 | 8 >> 12 | 15 | 256 >> >> If this is intentional, please state so and maybe add a Fixes tag. > > Hi Dmitry, > > Yep this was intentional to match downstream and the spec. Will add a > fixes tag for this. Good! I found corresponding change in msm-4.14, so now I understand why previously we had what we had. > > Thanks, > > Jessica Zhang > >> >> >>> data = det_thresh_flatness << 10; >>> data |= dsc->flatness_max_qp << 5; >>> data |= dsc->flatness_min_qp; >>> >> >> -- >> With best wishes >> Dmitry >>
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c index 619926da1441..648c530b5d05 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c @@ -3,6 +3,8 @@ * Copyright (c) 2020-2022, Linaro Limited */ +#include <drm/display/drm_dsc_helper.h> + #include "dpu_kms.h" #include "dpu_hw_catalog.h" #include "dpu_hwio.h" @@ -102,7 +104,7 @@ static void dpu_hw_dsc_config(struct dpu_hw_dsc *hw_dsc, data |= dsc->final_offset; DPU_REG_WRITE(c, DSC_DSC_OFFSET, data); - det_thresh_flatness = 7 + 2 * (dsc->bits_per_component - 8); + det_thresh_flatness = drm_dsc_calculate_det_thresh_flatness(dsc); data = det_thresh_flatness << 10; data |= dsc->flatness_max_qp << 5; data |= dsc->flatness_min_qp;
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> --- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)