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drm/msm/dp: Allow sub-regions to be specified in DT

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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.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211001174400.981707-6-bjorn.andersson@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Bjorn Andersson 2021-10-01 10:44:00 -07:00 committed by Rob Clark
parent 060c160fbb
commit 415f36903b
1 changed files with 38 additions and 11 deletions
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49
drivers/gpu/drm/msm/dp/dp_parser.c
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@ -50,18 +50,45 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
if (IS_ERR(dss->ahb.base))
return PTR_ERR(dss->ahb.base);
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.base = dp_ioremap(pdev, 1, &dss->aux.len);
if (IS_ERR(dss->aux.base)) {
/*
* 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 -EINVAL 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.base) == -EINVAL) {
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.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET;
dss->aux.len = DP_DEFAULT_AUX_SIZE;
dss->link.base = dss->ahb.base + DP_DEFAULT_LINK_OFFSET;
dss->link.len = DP_DEFAULT_LINK_SIZE;
dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET;
dss->p0.len = DP_DEFAULT_P0_SIZE;
dss->ahb.len = DP_DEFAULT_AHB_SIZE;
dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET;
dss->aux.len = DP_DEFAULT_AUX_SIZE;
dss->link.base = dss->ahb.base + DP_DEFAULT_LINK_OFFSET;
dss->link.len = DP_DEFAULT_LINK_SIZE;
dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET;
dss->p0.len = DP_DEFAULT_P0_SIZE;
} else {
DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base);
return PTR_ERR(dss->aux.base);
}
} else {
dss->link.base = dp_ioremap(pdev, 2, &dss->link.len);
if (IS_ERR(dss->link.base)) {
DRM_ERROR("unable to remap link region: %pe\n", dss->link.base);
return PTR_ERR(dss->link.base);
}
dss->p0.base = dp_ioremap(pdev, 3, &dss->p0.len);
if (IS_ERR(dss->p0.base)) {
DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base);
return PTR_ERR(dss->p0.base);
}
}
io->phy = devm_phy_get(&pdev->dev, "dp");
if (IS_ERR(io->phy))