From: Thierry Reding <tred...@nvidia.com>
The display controllers and VIC don't have any limitations on the
DMA segment size. Inherit the DMA parameters from the parent device,
which also doesn't have any such limitations.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
drivers/gpu/drm/tegra/dc.c | 9 +++++++++
drivers/gpu/drm/tegra/vic.c | 9 +++++++++
2 files changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index fbf57bc3cdab..f7f7984bb749 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2074,6 +2074,12 @@ static int tegra_dc_init(struct host1x_client *client)
goto cleanup;
}
+ /*
+ * Inherit the DMA parameters (such as maximum segment size) from the
+ * parent device.
+ */
+ client->dev->dma_parms = client->parent->dma_parms;
+
return 0;
cleanup:
@@ -2097,6 +2103,9 @@ static int tegra_dc_exit(struct host1x_client *client)
if (!tegra_dc_has_window_groups(dc))
return 0;
+ /* avoid a dangling pointer just in case this disappears */
+ client->dev->dma_parms = NULL;
+
devm_free_irq(dc->dev, dc->irq, dc);
err = tegra_dc_rgb_exit(dc);
diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
index c97a61c877af..8d98b0cfc47b 100644
--- a/drivers/gpu/drm/tegra/vic.c
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -214,6 +214,12 @@ static int vic_init(struct host1x_client *client)
if (err < 0)
goto free_syncpt;
+ /*
+ * Inherit the DMA parameters (such as maximum segment size) from the
+ * parent device.
+ */
+ client->dev->dma_parms = client->parent->dma_parms;
+
return 0;
free_syncpt:
@@ -236,6 +242,9 @@ static int vic_exit(struct host1x_client *client)
struct vic *vic = to_vic(drm);
int err;
+ /* avoid a dangling pointer just in case this disappears */
+ client->dev->dma_parms = NULL;
+
err = tegra_drm_unregister_client(tegra, drm);
if (err < 0)
return err;
--
2.23.0
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