From: Thierry Reding <treding@xxxxxxxxxx> 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@xxxxxxxxxx> --- 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 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
