drm/tegra: Properly align stride for framebuffers
Tegra20 and Tegra30 both required the buffer line stride to be aligned
on 8 byte boundaries. Tegra114 and Tegra124 increased the alignment to
64 bytes. Introduce a parameter to specify the alignment requirements
for each display controller and round up the pitch of newly allocated
framebuffers appropriately.
Originally-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index afcca04..8886907 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -19,6 +19,7 @@
bool supports_interlacing;
bool supports_cursor;
bool supports_block_linear;
+ unsigned int pitch_align;
};
struct tegra_plane {
@@ -1283,12 +1284,20 @@
{
struct drm_device *drm = dev_get_drvdata(client->parent);
struct tegra_dc *dc = host1x_client_to_dc(client);
+ struct tegra_drm *tegra = drm->dev_private;
int err;
drm_crtc_init(drm, &dc->base, &tegra_crtc_funcs);
drm_mode_crtc_set_gamma_size(&dc->base, 256);
drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
+ /*
+ * Keep track of the minimum pitch alignment across all display
+ * controllers.
+ */
+ if (dc->soc->pitch_align > tegra->pitch_align)
+ tegra->pitch_align = dc->soc->pitch_align;
+
err = tegra_dc_rgb_init(drm, dc);
if (err < 0 && err != -ENODEV) {
dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
@@ -1347,18 +1356,28 @@
.supports_interlacing = false,
.supports_cursor = false,
.supports_block_linear = false,
+ .pitch_align = 8,
};
static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
.supports_interlacing = false,
.supports_cursor = false,
.supports_block_linear = false,
+ .pitch_align = 8,
+};
+
+static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
+ .supports_interlacing = false,
+ .supports_cursor = false,
+ .supports_block_linear = false,
+ .pitch_align = 64,
};
static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
.supports_interlacing = true,
.supports_cursor = true,
.supports_block_linear = true,
+ .pitch_align = 64,
};
static const struct of_device_id tegra_dc_of_match[] = {