UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/tegra: Inherit device DMA parameters from host1x 

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 <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2019-09-09 14:25:45 +02:00
parent 33904487f1
commit 47b15779b0
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/tegra/dc.c
View File

@ -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);

9
drivers/gpu/drm/tegra/vic.c
View File

@ -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;