From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Rob Herring <robh+dt@kernel.org>,
Stephen Boyd <swboyd@chromium.org>,
Abhinav Kumar <abhinavk@codeaurora.org>
Cc: Kuogee Hsieh <khsieh@codeaurora.org>,
Tanmay Shah <tanmay@codeaurora.org>,
Chandan Uddaraju <chandanu@codeaurora.org>,
linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 5/5] drm/msm/dp: Allow sub-regions to be specified in DT
Date: Fri, 1 Oct 2021 10:44:00 -0700 [thread overview]
Message-ID: <20211001174400.981707-6-bjorn.andersson@linaro.org> (raw)
In-Reply-To: <20211001174400.981707-1-bjorn.andersson@linaro.org>
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>
---
Changes since v2:
- None
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 1f084b2b5bd3..4d6e047f803d 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -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 -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.base) == -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.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->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->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))
--
2.29.2
prev parent reply other threads:[~2021-10-01 17:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-01 17:43 [PATCH v3 0/5] drm/msm/dp: Allow variation in register regions Bjorn Andersson
2021-10-01 17:43 ` [PATCH v3 1/5] dt-bindings: msm/dp: Change reg definition Bjorn Andersson
2021-10-05 20:56 ` [Freedreno] " abhinavk
2021-10-01 17:43 ` [PATCH v3 2/5] drm/msm/dp: Use devres for ioremap() Bjorn Andersson
2021-10-01 17:43 ` [PATCH v3 3/5] drm/msm/dp: Refactor ioremap wrapper Bjorn Andersson
2021-10-05 1:04 ` Stephen Boyd
2021-10-05 1:19 ` Bjorn Andersson
2021-10-05 20:59 ` [Freedreno] " abhinavk
2021-10-01 17:43 ` [PATCH v3 4/5] drm/msm/dp: Store each subblock in the io region Bjorn Andersson
2021-10-05 21:04 ` [Freedreno] " abhinavk
2021-10-01 17:44 ` Bjorn Andersson [this message]
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