| Message ID | 20210722024227.3313096-6-bjorn.andersson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm/dp: Allow variation in register regions | expand |
Quoting Bjorn Andersson (2021-07-21 19:42:27) > Not all platforms has P0 at an offset of 0x1000 from the base address, > so add support for specifying each sub-region in DT. The code falls back > to the predefined offsets in the case that only a single reg is > specified, in order to support existing DT. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- Reviewed-by: Stephen Boyd <swboyd@chromium.org>
On 2021-07-21 19:42, Bjorn Andersson wrote: > Not all platforms has P0 at an offset of 0x1000 from the base address, > so add support for specifying each sub-region in DT. The code falls > back > to the predefined offsets in the case that only a single reg is > specified, in order to support existing DT. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> The change itself looks good, hence Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org> But as a follow up to this change, can we move the existing DP DT on sc7180 to this model and then drop this legacy path? That will clean this up nicely. > --- > drivers/gpu/drm/msm/dp/dp_parser.c | 49 +++++++++++++++++++++++------- > 1 file changed, 38 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c > b/drivers/gpu/drm/msm/dp/dp_parser.c > index 1a10901ae574..fc8a6452f641 100644 > --- a/drivers/gpu/drm/msm/dp/dp_parser.c > +++ b/drivers/gpu/drm/msm/dp/dp_parser.c > @@ -63,18 +63,45 @@ static int dp_parser_ctrl_res(struct dp_parser > *parser) > return PTR_ERR(dss->ahb); > } > > - if (dss->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) { > - DRM_ERROR("legacy memory region not large enough\n"); > - return -EINVAL; > - } > + dss->aux = dp_ioremap(pdev, 1, &dss->aux_len); > + if (IS_ERR(dss->aux)) { > + /* > + * The initial binding had a single reg, but in order to > + * support variation in the sub-region sizes this was split. > + * dp_ioremap() will fail with -ENODEV here if only a single > + * reg is specified, so fill in the sub-region offsets and > + * lengths based on this single region. > + */ > + if (PTR_ERR(dss->aux) == -ENODEV) { > + if (dss->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) { > + DRM_ERROR("legacy memory region not large enough\n"); > + return -EINVAL; > + } > + > + dss->ahb_len = DP_DEFAULT_AHB_SIZE; > + dss->aux = dss->ahb + DP_DEFAULT_AUX_OFFSET; > + dss->aux_len = DP_DEFAULT_AUX_SIZE; > + dss->link = dss->ahb + DP_DEFAULT_LINK_OFFSET; > + dss->link_len = DP_DEFAULT_LINK_SIZE; > + dss->p0 = dss->ahb + DP_DEFAULT_P0_OFFSET; > + dss->p0_len = DP_DEFAULT_P0_SIZE; > + } else { > + DRM_ERROR("unable to remap aux region: %pe\n", dss->aux); > + return PTR_ERR(dss->aux); > + } > + } else { > + dss->link = dp_ioremap(pdev, 2, &dss->link_len); > + if (IS_ERR(dss->link)) { > + DRM_ERROR("unable to remap link region: %pe\n", dss->link); > + return PTR_ERR(dss->link); > + } > > - dss->ahb_len = DP_DEFAULT_AHB_SIZE; > - dss->aux = dss->ahb + DP_DEFAULT_AUX_OFFSET; > - dss->aux_len = DP_DEFAULT_AUX_SIZE; > - dss->link = dss->ahb + DP_DEFAULT_LINK_OFFSET; > - dss->link_len = DP_DEFAULT_LINK_SIZE; > - dss->p0 = dss->ahb + DP_DEFAULT_P0_OFFSET; > - dss->p0_len = DP_DEFAULT_P0_SIZE; > + dss->p0 = dp_ioremap(pdev, 3, &dss->p0_len); > + if (IS_ERR(dss->p0)) { > + DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0); > + return PTR_ERR(dss->p0); > + } > + } > > io->phy = devm_phy_get(&pdev->dev, "dp"); > if (IS_ERR(io->phy))
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index 1a10901ae574..fc8a6452f641 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -63,18 +63,45 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) return PTR_ERR(dss->ahb); } - if (dss->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) { - DRM_ERROR("legacy memory region not large enough\n"); - return -EINVAL; - } + dss->aux = dp_ioremap(pdev, 1, &dss->aux_len); + if (IS_ERR(dss->aux)) { + /* + * The initial binding had a single reg, but in order to + * support variation in the sub-region sizes this was split. + * dp_ioremap() will fail with -ENODEV here if only a single + * reg is specified, so fill in the sub-region offsets and + * lengths based on this single region. + */ + if (PTR_ERR(dss->aux) == -ENODEV) { + if (dss->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) { + DRM_ERROR("legacy memory region not large enough\n"); + return -EINVAL; + } + + dss->ahb_len = DP_DEFAULT_AHB_SIZE; + dss->aux = dss->ahb + DP_DEFAULT_AUX_OFFSET; + dss->aux_len = DP_DEFAULT_AUX_SIZE; + dss->link = dss->ahb + DP_DEFAULT_LINK_OFFSET; + dss->link_len = DP_DEFAULT_LINK_SIZE; + dss->p0 = dss->ahb + DP_DEFAULT_P0_OFFSET; + dss->p0_len = DP_DEFAULT_P0_SIZE; + } else { + DRM_ERROR("unable to remap aux region: %pe\n", dss->aux); + return PTR_ERR(dss->aux); + } + } else { + dss->link = dp_ioremap(pdev, 2, &dss->link_len); + if (IS_ERR(dss->link)) { + DRM_ERROR("unable to remap link region: %pe\n", dss->link); + return PTR_ERR(dss->link); + } - dss->ahb_len = DP_DEFAULT_AHB_SIZE; - dss->aux = dss->ahb + DP_DEFAULT_AUX_OFFSET; - dss->aux_len = DP_DEFAULT_AUX_SIZE; - dss->link = dss->ahb + DP_DEFAULT_LINK_OFFSET; - dss->link_len = DP_DEFAULT_LINK_SIZE; - dss->p0 = dss->ahb + DP_DEFAULT_P0_OFFSET; - dss->p0_len = DP_DEFAULT_P0_SIZE; + dss->p0 = dp_ioremap(pdev, 3, &dss->p0_len); + if (IS_ERR(dss->p0)) { + DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0); + return PTR_ERR(dss->p0); + } + } io->phy = devm_phy_get(&pdev->dev, "dp"); if (IS_ERR(io->phy))
Not all platforms has P0 at an offset of 0x1000 from the base address, so add support for specifying each sub-region in DT. The code falls back to the predefined offsets in the case that only a single reg is specified, in order to support existing DT. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/gpu/drm/msm/dp/dp_parser.c | 49 +++++++++++++++++++++++------- 1 file changed, 38 insertions(+), 11 deletions(-)