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drm: Code stereo layouts as an enum rather than a bit field

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This allows us to use fewer bits in the mode structure, leaving room for
future work while allowing more stereo layouts types than we could have
ever dreamt of.

I also exposed the previously private DRM_MODE_FLAG_3D_MASK to set in
stone that we are using 5 bits for the stereo layout enum, reserving 32
values.

Even with that reservation, we gain 3 bits from the previous encoding.

The code adding the mandatory stereo modes needeed to be adapted as it was
relying or being able to or stereo layouts together.

Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-09-27 12:11:48 +01:00 committed by Daniel Vetter
parent e454a05da6
commit f7e121b764
3 changed files with 26 additions and 49 deletions
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45
drivers/gpu/drm/drm_edid.c
View file

@ -2562,16 +2562,16 @@ struct stereo_mandatory_mode {
};
static const struct stereo_mandatory_mode stereo_mandatory_modes[] = {
{ 1920, 1080, 24,
DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING },
{ 1920, 1080, 24, DRM_MODE_FLAG_3D_TOP_AND_BOTTOM },
{ 1920, 1080, 24, DRM_MODE_FLAG_3D_FRAME_PACKING },
{ 1920, 1080, 50,
DRM_MODE_FLAG_INTERLACE | DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF },
{ 1920, 1080, 60,
DRM_MODE_FLAG_INTERLACE | DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF },
{ 1280, 720, 50,
DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING },
{ 1280, 720, 60,
DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING }
{ 1280, 720, 50, DRM_MODE_FLAG_3D_TOP_AND_BOTTOM },
{ 1280, 720, 50, DRM_MODE_FLAG_3D_FRAME_PACKING },
{ 1280, 720, 60, DRM_MODE_FLAG_3D_TOP_AND_BOTTOM },
{ 1280, 720, 60, DRM_MODE_FLAG_3D_FRAME_PACKING }
};
static bool
@ -2586,50 +2586,33 @@ stereo_match_mandatory(const struct drm_display_mode *mode,
drm_mode_vrefresh(mode) == stereo_mode->vrefresh;
}
static const struct stereo_mandatory_mode *
hdmi_find_stereo_mandatory_mode(const struct drm_display_mode *mode)
{
int i;
for (i = 0; i < ARRAY_SIZE(stereo_mandatory_modes); i++)
if (stereo_match_mandatory(mode, &stereo_mandatory_modes[i]))
return &stereo_mandatory_modes[i];
return NULL;
}
static int add_hdmi_mandatory_stereo_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
const struct drm_display_mode *mode;
struct list_head stereo_modes;
int modes = 0;
int modes = 0, i;
INIT_LIST_HEAD(&stereo_modes);
list_for_each_entry(mode, &connector->probed_modes, head) {
for (i = 0; i < ARRAY_SIZE(stereo_mandatory_modes); i++) {
const struct stereo_mandatory_mode *mandatory;
u32 stereo_layouts, layout;
mandatory = hdmi_find_stereo_mandatory_mode(mode);
if (!mandatory)
continue;
stereo_layouts = mandatory->flags & DRM_MODE_FLAG_3D_MASK;
do {
struct drm_display_mode *new_mode;
layout = 1 << (ffs(stereo_layouts) - 1);
stereo_layouts &= ~layout;
if (!stereo_match_mandatory(mode,
&stereo_mandatory_modes[i]))
continue;
mandatory = &stereo_mandatory_modes[i];
new_mode = drm_mode_duplicate(dev, mode);
if (!new_mode)
continue;
new_mode->flags |= layout;
new_mode->flags |= mandatory->flags;
list_add_tail(&new_mode->head, &stereo_modes);
modes++;
} while (stereo_layouts);
}
}
list_splice_tail(&stereo_modes, &connector->probed_modes);

9
include/drm/drm_crtc.h
View file

@ -181,15 +181,6 @@ struct drm_display_mode {
int hsync; /* in kHz */
};
#define DRM_MODE_FLAG_3D_MASK (DRM_MODE_FLAG_3D_FRAME_PACKING | \
DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE | \
DRM_MODE_FLAG_3D_LINE_ALTERNATIVE | \
DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL | \
DRM_MODE_FLAG_3D_L_DEPTH | \
DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH | \
DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | \
DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF)
static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
{
return mode->flags & DRM_MODE_FLAG_3D_MASK;

17
include/uapi/drm/drm_mode.h
View file

@ -58,14 +58,17 @@
#define DRM_MODE_FLAG_PIXMUX (1<<11)
#define DRM_MODE_FLAG_DBLCLK (1<<12)
#define DRM_MODE_FLAG_CLKDIV2 (1<<13)
#define DRM_MODE_FLAG_3D_MASK (0x1f<<14)
#define DRM_MODE_FLAG_3D_NONE (0<<14)
#define DRM_MODE_FLAG_3D_FRAME_PACKING (1<<14)
#define DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE (1<<15)
#define DRM_MODE_FLAG_3D_LINE_ALTERNATIVE (1<<16)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL (1<<17)
#define DRM_MODE_FLAG_3D_L_DEPTH (1<<18)
#define DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH (1<<19)
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (1<<20)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (1<<21)
#define DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE (2<<14)
#define DRM_MODE_FLAG_3D_LINE_ALTERNATIVE (3<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL (4<<14)
#define DRM_MODE_FLAG_3D_L_DEPTH (5<<14)
#define DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH (6<<14)
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (7<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (8<<14)
/* DPMS flags */
/* bit compatible with the xorg definitions. */