| Message ID | 1661361751-2173-1-git-send-email-quic_khsieh@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] drm/msm/dp: correct 1.62G link rate at dp_catalog_ctrl_config_msa() | expand |
Quoting Kuogee Hsieh (2022-08-24 10:22:31) > At current implementation there is an extra 0 at 1.62G link rate which cause > no correct pixel_div selected for 1.62G link rate to calculate mvid and nvid. > This patch delete the extra 0 to have mvid and nvid be calculated correctly. > > Changes in v2: > -- fix Fixes tag's text > > Fixes: 937f941ca06f ("drm/msm/dp: Use qmp phy for DP PLL and PHY") > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > > Reviewed-by: Stephen Boyd <swboyd@chromium.org> > eviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> Missing an R. > > diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c > index 7257515..676279d 100644 > --- a/drivers/gpu/drm/msm/dp/dp_catalog.c > +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c > @@ -431,7 +431,7 @@ void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, > > if (rate == link_rate_hbr3) > pixel_div = 6; > - else if (rate == 1620000 || rate == 270000) > + else if (rate == 162000 || rate == 270000) BTW $ git grep 162000 -- drivers/gpu/drm/msm/dp/ drivers/gpu/drm/msm/dp/dp_catalog.c: else if (rate == 1620000 || rate == 270000) drivers/gpu/drm/msm/dp/dp_ctrl.c: ctrl->link->link_params.rate = 162000; drivers/gpu/drm/msm/dp/dp_ctrl.c: case 162000: We really should have a #define for these things. Can you send a different followup patch that makes something like HBR3_KHZ, HBR2_KHZ, etc. and then replaces these bare numbers throughout the driver? That would prevent this from happening again. This one liner can and should be backported to stable trees.
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 7257515..676279d 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -431,7 +431,7 @@ void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, if (rate == link_rate_hbr3) pixel_div = 6; - else if (rate == 1620000 || rate == 270000) + else if (rate == 162000 || rate == 270000) pixel_div = 2; else if (rate == link_rate_hbr2) pixel_div = 4;
At current implementation there is an extra 0 at 1.62G link rate which cause no correct pixel_div selected for 1.62G link rate to calculate mvid and nvid. This patch delete the extra 0 to have mvid and nvid be calculated correctly. Changes in v2: -- fix Fixes tag's text Fixes: 937f941ca06f ("drm/msm/dp: Use qmp phy for DP PLL and PHY") Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> eviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_catalog.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)