| Message ID | 20230405-add-dsc-support-v4-1-15daf84f8dcb@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add DSC v1.2 Support for DSI | expand |
On 2023-05-22 13:30:20, Jessica Zhang wrote: > Currently, when compression is enabled, hdisplay is reduced via integer > division. This causes issues for modes where the original hdisplay is > not a multiple of 3. > > To fix this, use DIV_ROUND_UP to divide hdisplay. > > Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> Nit: probably these should go in the opposite order. And if they're all supposed to be chronological, I think it is: Suggested-by: Fixes: Signed-off-by: Reviewed-by: But unsure if that's a hard requirement, or even correct at all. - Marijn > Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") > Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> > --- > drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c > index 9223d7ec5a73..18d38b90eb28 100644 > --- a/drivers/gpu/drm/msm/dsi/dsi_host.c > +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c > @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) > * pulse width same > */ > h_total -= hdisplay; > - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; > + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); > h_total += hdisplay; > ha_end = ha_start + hdisplay; > } > > -- > 2.40.1 >
On 22.05.2023 22:44, Marijn Suijten wrote: > On 2023-05-22 13:30:20, Jessica Zhang wrote: >> Currently, when compression is enabled, hdisplay is reduced via integer >> division. This causes issues for modes where the original hdisplay is >> not a multiple of 3. >> >> To fix this, use DIV_ROUND_UP to divide hdisplay. >> >> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> >> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> > > Nit: probably these should go in the opposite order. And if they're > all supposed to be chronological, I think it is: > > Suggested-by: > Fixes: > Signed-off-by: > Reviewed-by: > > But unsure if that's a hard requirement, or even correct at all. > > - Marijn Or you can rely on b4 to pick that up if it comes from others Konrad > >> Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") >> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> >> --- >> drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c >> index 9223d7ec5a73..18d38b90eb28 100644 >> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c >> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c >> @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) >> * pulse width same >> */ >> h_total -= hdisplay; >> - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; >> + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); >> h_total += hdisplay; >> ha_end = ha_start + hdisplay; >> } >> >> -- >> 2.40.1 >>
On 2023-05-22 22:52:40, Konrad Dybcio wrote: > > > On 22.05.2023 22:44, Marijn Suijten wrote: > > On 2023-05-22 13:30:20, Jessica Zhang wrote: > >> Currently, when compression is enabled, hdisplay is reduced via integer > >> division. This causes issues for modes where the original hdisplay is > >> not a multiple of 3. > >> > >> To fix this, use DIV_ROUND_UP to divide hdisplay. > >> > >> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > >> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> > > > > Nit: probably these should go in the opposite order. And if they're > > all supposed to be chronological, I think it is: > > > > Suggested-by: > > Fixes: > > Signed-off-by: > > Reviewed-by: > > > > But unsure if that's a hard requirement, or even correct at all. > > > > - Marijn > Or you can rely on b4 to pick that up if it comes from others The problem is that somewhat stupidly, b4 (trailers -u) puts them in the wrong (not chronological) order, so it's pretty much useless for this. Unless there's a required ordering specified somewhere in the docs, that is *not* chronological, and that b4 is abiding by? (that is my question above) - Marijn > > Konrad <snip>
On 5/22/2023 1:44 PM, Marijn Suijten wrote: > On 2023-05-22 13:30:20, Jessica Zhang wrote: >> Currently, when compression is enabled, hdisplay is reduced via integer >> division. This causes issues for modes where the original hdisplay is >> not a multiple of 3. >> >> To fix this, use DIV_ROUND_UP to divide hdisplay. >> >> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> >> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> > > Nit: probably these should go in the opposite order. And if they're > all supposed to be chronological, I think it is: > > Suggested-by: > Fixes: > Signed-off-by: > Reviewed-by: > > But unsure if that's a hard requirement, or even correct at all. Hi Marijn, I don't see any explicit documentation on the order of R-b tags. FWIW, I see in the git log that S-o-b always goes at the bottom of the commit message. I would prefer the S-o-b to always be at the bottom (as it helps me avoid duplicate S-o-b's when doing `git commit -s`), though I can flip the order of the R-b and suggested-by tags. Thanks, Jessica Zhang > > - Marijn > >> Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") >> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> >> --- >> drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c >> index 9223d7ec5a73..18d38b90eb28 100644 >> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c >> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c >> @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) >> * pulse width same >> */ >> h_total -= hdisplay; >> - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; >> + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); >> h_total += hdisplay; >> ha_end = ha_start + hdisplay; >> } >> >> -- >> 2.40.1 >>
On 5/22/2023 2:45 PM, Jessica Zhang wrote: > > > On 5/22/2023 1:44 PM, Marijn Suijten wrote: >> On 2023-05-22 13:30:20, Jessica Zhang wrote: >>> Currently, when compression is enabled, hdisplay is reduced via integer >>> division. This causes issues for modes where the original hdisplay is >>> not a multiple of 3. >>> >>> To fix this, use DIV_ROUND_UP to divide hdisplay. >>> >>> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> >>> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> >> >> Nit: probably these should go in the opposite order. And if they're >> all supposed to be chronological, I think it is: >> >> Suggested-by: >> Fixes: >> Signed-off-by: >> Reviewed-by: >> >> But unsure if that's a hard requirement, or even correct at all. > > Hi Marijn, > > I don't see any explicit documentation on the order of R-b tags. FWIW, I > see in the git log that S-o-b always goes at the bottom of the commit > message. > > I would prefer the S-o-b to always be at the bottom (as it helps me > avoid duplicate S-o-b's when doing `git commit -s`), though I can flip > the order of the R-b and suggested-by tags. Correction -- I can reorder the tags so that it's: Suggested-by: Fixes: Reviewed-by: Signed-off-by: Thanks, Jessica Zhang > > Thanks, > > Jessica Zhang > >> >> - Marijn >> >>> Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") >>> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> >>> --- >>> drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c >>> b/drivers/gpu/drm/msm/dsi/dsi_host.c >>> index 9223d7ec5a73..18d38b90eb28 100644 >>> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c >>> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c >>> @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host >>> *msm_host, bool is_bonded_dsi) >>> * pulse width same >>> */ >>> h_total -= hdisplay; >>> - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; >>> + hdisplay = >>> DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); >>> h_total += hdisplay; >>> ha_end = ha_start + hdisplay; >>> } >>> >>> -- >>> 2.40.1 >>>
On Tue, 23 May 2023 at 00:45, Jessica Zhang <quic_jesszhan@quicinc.com> wrote: > > > > On 5/22/2023 1:44 PM, Marijn Suijten wrote: > > On 2023-05-22 13:30:20, Jessica Zhang wrote: > >> Currently, when compression is enabled, hdisplay is reduced via integer > >> division. This causes issues for modes where the original hdisplay is > >> not a multiple of 3. > >> > >> To fix this, use DIV_ROUND_UP to divide hdisplay. > >> > >> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > >> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> > > > > Nit: probably these should go in the opposite order. And if they're > > all supposed to be chronological, I think it is: > > > > Suggested-by: > > Fixes: > > Signed-off-by: > > Reviewed-by: > > > > But unsure if that's a hard requirement, or even correct at all. > > Hi Marijn, > > I don't see any explicit documentation on the order of R-b tags. FWIW, I > see in the git log that S-o-b always goes at the bottom of the commit > message. > > I would prefer the S-o-b to always be at the bottom (as it helps me > avoid duplicate S-o-b's when doing `git commit -s`), though I can flip > the order of the R-b and suggested-by tags. I'd second Jessica here. Consider these tags as a history or a transcript: I would not vote on the particular order of the Suggested-by/Fixes tags, I don't think that is important. These come first. Then the patch goes through different cycles. of reviews, which gain Reviewed-by tags. In the same way Link/Patchwork/whatever other tags are added in the historical order. By having the submitter's S-o-b at the bottom, the submitter adds the final signature under everything else being stated/recorded. Of course, in a more complicated story, there might be other developers taking part (Co-Developed-By + Signed-off-by), etc. Note: all described is just my perception and might differ from the BCP regarding the tags. > > Thanks, > > Jessica Zhang > > > > > - Marijn > > > >> Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") > >> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> > >> --- > >> drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- > >> 1 file changed, 1 insertion(+), 1 deletion(-) > >> > >> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c > >> index 9223d7ec5a73..18d38b90eb28 100644 > >> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c > >> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c > >> @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) > >> * pulse width same > >> */ > >> h_total -= hdisplay; > >> - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; > >> + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); > >> h_total += hdisplay; > >> ha_end = ha_start + hdisplay; > >> } > >> > >> -- > >> 2.40.1 > >>
On 2023-05-23 01:14:40, Dmitry Baryshkov wrote: > On Tue, 23 May 2023 at 00:45, Jessica Zhang <quic_jesszhan@quicinc.com> wrote: > > > > > > > > On 5/22/2023 1:44 PM, Marijn Suijten wrote: > > > On 2023-05-22 13:30:20, Jessica Zhang wrote: > > >> Currently, when compression is enabled, hdisplay is reduced via integer > > >> division. This causes issues for modes where the original hdisplay is > > >> not a multiple of 3. > > >> > > >> To fix this, use DIV_ROUND_UP to divide hdisplay. > > >> > > >> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > > >> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> > > > > > > Nit: probably these should go in the opposite order. And if they're > > > all supposed to be chronological, I think it is: > > > > > > Suggested-by: > > > Fixes: > > > Signed-off-by: > > > Reviewed-by: > > > > > > But unsure if that's a hard requirement, or even correct at all. > > > > Hi Marijn, > > > > I don't see any explicit documentation on the order of R-b tags. FWIW, I > > see in the git log that S-o-b always goes at the bottom of the commit > > message. > > > > I would prefer the S-o-b to always be at the bottom (as it helps me > > avoid duplicate S-o-b's when doing `git commit -s`), though I can flip > > the order of the R-b and suggested-by tags. > > I'd second Jessica here. Consider these tags as a history or a transcript: > > I would not vote on the particular order of the Suggested-by/Fixes > tags, I don't think that is important. These come first. Then the > patch goes through different cycles. of reviews, which gain > Reviewed-by tags. > > In the same way Link/Patchwork/whatever other tags are added in the > historical order. > > By having the submitter's S-o-b at the bottom, the submitter adds the > final signature under everything else being stated/recorded. Correct, so the s-o-b can always be kept / moved back to the bottom on a resend, stating that they sign off on "all that was written previously" including picking up reviews. However, for the rest of your reply about "history / transcript", you seem to agree exactly with my point of keeping (or rather, simply appending) these in chronological order? - Marijn > > Of course, in a more complicated story, there might be other > developers taking part (Co-Developed-By + Signed-off-by), etc. > > Note: all described is just my perception and might differ from the > BCP regarding the tags. <snip>
On 23/05/2023 01:18, Marijn Suijten wrote: > On 2023-05-23 01:14:40, Dmitry Baryshkov wrote: >> On Tue, 23 May 2023 at 00:45, Jessica Zhang <quic_jesszhan@quicinc.com> wrote: >>> >>> >>> >>> On 5/22/2023 1:44 PM, Marijn Suijten wrote: >>>> On 2023-05-22 13:30:20, Jessica Zhang wrote: >>>>> Currently, when compression is enabled, hdisplay is reduced via integer >>>>> division. This causes issues for modes where the original hdisplay is >>>>> not a multiple of 3. >>>>> >>>>> To fix this, use DIV_ROUND_UP to divide hdisplay. >>>>> >>>>> Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> >>>>> Suggested-by: Marijn Suijten <marijn.suijten@somainline.org> >>>> >>>> Nit: probably these should go in the opposite order. And if they're >>>> all supposed to be chronological, I think it is: >>>> >>>> Suggested-by: >>>> Fixes: >>>> Signed-off-by: >>>> Reviewed-by: >>>> >>>> But unsure if that's a hard requirement, or even correct at all. >>> >>> Hi Marijn, >>> >>> I don't see any explicit documentation on the order of R-b tags. FWIW, I >>> see in the git log that S-o-b always goes at the bottom of the commit >>> message. >>> >>> I would prefer the S-o-b to always be at the bottom (as it helps me >>> avoid duplicate S-o-b's when doing `git commit -s`), though I can flip >>> the order of the R-b and suggested-by tags. >> >> I'd second Jessica here. Consider these tags as a history or a transcript: >> >> I would not vote on the particular order of the Suggested-by/Fixes >> tags, I don't think that is important. These come first. Then the >> patch goes through different cycles. of reviews, which gain >> Reviewed-by tags. >> >> In the same way Link/Patchwork/whatever other tags are added in the >> historical order. >> >> By having the submitter's S-o-b at the bottom, the submitter adds the >> final signature under everything else being stated/recorded. > > Correct, so the s-o-b can always be kept / moved back to the bottom on a > resend, stating that they sign off on "all that was written previously" > including picking up reviews. > > However, for the rest of your reply about "history / transcript", you > seem to agree exactly with my point of keeping (or rather, simply > appending) these in chronological order? Yes. > > - Marijn > >> >> Of course, in a more complicated story, there might be other >> developers taking part (Co-Developed-By + Signed-off-by), etc. >> >> Note: all described is just my perception and might differ from the >> BCP regarding the tags. > > <snip>
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 9223d7ec5a73..18d38b90eb28 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) * pulse width same */ h_total -= hdisplay; - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); h_total += hdisplay; ha_end = ha_start + hdisplay; }