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drm/tegra: Support bottom-up buffer objects 

The gr3d engine renders images bottom-up. Allow buffers that are used
for 3D content to be marked as such and implement support in the display
controller to present them properly.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2013-10-07 09:47:58 +02:00 committed by Thierry Reding
parent 773af77fc4
commit db7fbdfd25
7 changed files with 44 additions and 2 deletions
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24
drivers/gpu/drm/tegra/dc.c
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@ -47,6 +47,7 @@ static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
window.dst.h = crtc_h;
window.format = tegra_dc_format(fb->pixel_format);
window.bits_per_pixel = fb->bits_per_pixel;
window.bottom_up = tegra_fb_is_bottom_up(fb);
window.tiled = tegra_fb_is_tiled(fb);
for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
@ -147,6 +148,7 @@ static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
{
unsigned int format = tegra_dc_format(fb->pixel_format);
struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
unsigned int h_offset = 0, v_offset = 0;
unsigned long value;
tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
@ -168,6 +170,22 @@ static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
/* make sure bottom-up buffers are properly displayed */
if (tegra_fb_is_bottom_up(fb)) {
value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
value |= INVERT_V;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
v_offset += fb->height - 1;
} else {
value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
value &= ~INVERT_V;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
}
tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
value = GENERAL_UPDATE | WIN_A_UPDATE;
tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
@ -517,6 +535,9 @@ int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE);
}
if (window->bottom_up)
v_offset += window->src.h - 1;
tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
@ -548,6 +569,9 @@ int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
value |= COLOR_EXPAND;
}
if (window->bottom_up)
value |= INVERT_V;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
/*

1
drivers/gpu/drm/tegra/dc.h
View File

@ -302,6 +302,7 @@
#define DC_WIN_CSC_KVB 0x618
#define DC_WIN_WIN_OPTIONS 0x700
#define INVERT_V (1 << 2)
#define COLOR_EXPAND (1 << 6)
#define CSC_ENABLE (1 << 18)
#define WIN_ENABLE (1 << 30)

2
drivers/gpu/drm/tegra/drm.h
View File

@ -148,6 +148,7 @@ struct tegra_dc_window {
unsigned int format;
unsigned int stride[2];
unsigned long base[3];
bool bottom_up;
bool tiled;
};
@ -255,6 +256,7 @@ extern int tegra_output_exit(struct tegra_output *output);
/* from fb.c */
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index);
bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer);
bool tegra_fb_is_tiled(struct drm_framebuffer *framebuffer);
extern int tegra_drm_fb_init(struct drm_device *drm);
extern void tegra_drm_fb_exit(struct drm_device *drm);

10
drivers/gpu/drm/tegra/fb.c
View File

@ -34,6 +34,16 @@ struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
return fb->planes[index];
}
bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
return true;
return false;
}
bool tegra_fb_is_tiled(struct drm_framebuffer *framebuffer)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);

3
drivers/gpu/drm/tegra/gem.c
View File

@ -132,6 +132,9 @@ struct tegra_bo *tegra_bo_create(struct drm_device *drm, unsigned int size,
if (flags & DRM_TEGRA_GEM_CREATE_TILED)
bo->flags |= TEGRA_BO_TILED;
if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP)
bo->flags |= TEGRA_BO_BOTTOM_UP;
return bo;
err_mmap:

3
drivers/gpu/drm/tegra/gem.h
View File

@ -24,7 +24,8 @@
#include <drm/drm.h>
#include <drm/drmP.h>
#define TEGRA_BO_TILED (1 << 0)
#define TEGRA_BO_TILED (1 << 0)
#define TEGRA_BO_BOTTOM_UP (1 << 1)
struct tegra_bo {
struct drm_gem_object gem;

3
include/uapi/drm/tegra_drm.h
View File

@ -19,7 +19,8 @@
#include <drm/drm.h>
#define DRM_TEGRA_GEM_CREATE_TILED (1 << 0)
#define DRM_TEGRA_GEM_CREATE_TILED (1 << 0)
#define DRM_TEGRA_GEM_CREATE_BOTTOM_UP (1 << 1)
struct drm_tegra_gem_create {
__u64 size;