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drm/tegra: Properly align stride for framebuffers

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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>
This commit is contained in:
Thierry Reding
2014-07-11 08:29:14 +02:00
parent 3f4f3b5fed
commit d1f3e1e0b3
4 changed files with 27 additions and 1 deletions
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19
drivers/gpu/drm/tegra/dc.c
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@@ -19,6 +19,7 @@ struct tegra_dc_soc_info {
bool supports_interlacing;
bool supports_cursor;
bool supports_block_linear;
unsigned int pitch_align;
};
struct tegra_plane {
@@ -1283,12 +1284,20 @@ static int tegra_dc_init(struct host1x_client *client)
{
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 @@ static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
.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[] = {