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drm/i915: implement drmmode overlay support v4

Bladeren bron 
This implements intel overlay support for kms via a device-specific
ioctl. Thomas Hellstrom brought up the idea of a general ioctl (on
dri-devel). We've reached the conclusion that such an infrastructure
only makes sense when multiple kms overlay implementations exists,
which atm don't (and it doesn't look like this is gonna change).

Open issues:
- Runs in sync with the gpu, i.e. unnecessary waiting. I've decided
  to wait on this because the hw tends to hang when changing something
  in this area. I left some dummy functions as infrastructure.
- polyphase filtering uses a static table.
- uses uninterruptible sleeps. Unfortunately the alternatives may
  unnecessarily wedged the hw if/when we timeout too early (and
  userspace only overloaded the batch buffers with stuff worth a few
  secs of gpu time).

Changes since v1:
- fix off-by-one misconception on my side. This fixes fullscreen
  playback.
Changes since v2:
- add underrun detection as spec'ed for i965.
- flush caches properly, fixing visual corruptions.
Changes since v4:
- fix up cache flushing of overlay memory regs.
- killed require_pipe_a logic - it hangs the chip.

Tested-By: diego.abelenda@gmail.com (on a 865G)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[anholt: Resolved against the MADVISE ioctl going in before this one]
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Daniel Vetter
2009-09-15 22:57:34 +02:00
gecommit door Eric Anholt
bovenliggende f0f8a9cece
commit 02e792fbaa
8 gewijzigde bestanden met toevoegingen van 1432 en 3 verwijderingen
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28
drivers/gpu/drm/i915/intel_drv.h
Bestand weergeven

@@ -110,6 +110,25 @@ struct intel_output {
int clone_mask;
};
struct intel_crtc;
struct intel_overlay {
struct drm_device *dev;
struct intel_crtc *crtc;
struct drm_i915_gem_object *vid_bo;
struct drm_i915_gem_object *old_vid_bo;
int active;
int pfit_active;
u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
u32 color_key;
u32 brightness, contrast, saturation;
u32 old_xscale, old_yscale;
/* register access */
u32 flip_addr;
struct drm_i915_gem_object *reg_bo;
void *virt_addr;
int hw_wedged;
};
struct intel_crtc {
struct drm_crtc base;
enum pipe pipe;
@@ -121,6 +140,7 @@ struct intel_crtc {
bool busy; /* is scanout buffer being updated frequently? */
struct timer_list idle_timer;
bool lowfreq_avail;
struct intel_overlay *overlay;
};
#define to_intel_crtc(x) container_of(x, struct intel_crtc, base)
@@ -148,6 +168,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
extern void intel_edp_link_config (struct intel_output *, int *, int *);
extern int intel_panel_fitter_pipe (struct drm_device *dev);
extern void intel_crtc_load_lut(struct drm_crtc *crtc);
extern void intel_encoder_prepare (struct drm_encoder *encoder);
extern void intel_encoder_commit (struct drm_encoder *encoder);
@@ -183,4 +204,11 @@ extern int intel_framebuffer_create(struct drm_device *dev,
struct drm_framebuffer **fb,
struct drm_gem_object *obj);
extern void intel_setup_overlay(struct drm_device *dev);
extern void intel_cleanup_overlay(struct drm_device *dev);
extern int intel_overlay_switch_off(struct intel_overlay *overlay);
extern int intel_overlay_put_image(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int intel_overlay_attrs(struct drm_device *dev, void *data,
struct drm_file *file_priv);
#endif /* __INTEL_DRV_H__ */