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drm/i915/fbc: introduce struct intel_fbc_reg_params 

The early return inside __intel_fbc_update does not completely check
all the parameters that affect the FBC register values. For example,
we currently lack looking at crtc->adjusted_y (for the fence Y offset)
and all the parameters that affect the CFB size (for i8xx).

Instead of just adding the missing parameters to the check and hoping
that any changes to the fbc_activate functions also come with a
matching change to the __intel_fbc_update check, introduce a new
structure where we store these parameters and use the structure at the
fbc_activate function. Of course, it's still possible to access
everything from dev_priv in those functions, but IMHO the new code
will be harder to break.

v2: Rebase.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453210558-7875-5-git-send-email-paulo.r.zanoni@intel.com
This commit is contained in:
Paulo Zanoni 2015-12-23 18:28:11 -02:00
parent 44a8a25708
commit b183b3f143
2 changed files with 93 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/gpu/drm/i915/i915_drv.h
View File

@ -905,11 +905,9 @@ struct i915_fbc {
* it's the outer lock when overlapping with stolen_lock. */
struct mutex lock;
unsigned threshold;
unsigned int fb_id;
unsigned int possible_framebuffer_bits;
unsigned int busy_bits;
struct intel_crtc *crtc;
int y;
struct drm_mm_node compressed_fb;
struct drm_mm_node *compressed_llb;
@ -919,6 +917,24 @@ struct i915_fbc {
bool enabled;
bool active;
struct intel_fbc_reg_params {
struct {
enum pipe pipe;
enum plane plane;
unsigned int fence_y_offset;
} crtc;
struct {
u64 ggtt_offset;
uint32_t id;
uint32_t pixel_format;
unsigned int stride;
int fence_reg;
} fb;
int cfb_size;
} params;
struct intel_fbc_work {
bool scheduled;
u32 scheduled_vblank;
@ -929,7 +945,7 @@ struct i915_fbc {
const char *no_fbc_reason;
bool (*is_active)(struct drm_i915_private *dev_priv);
void (*activate)(struct intel_crtc *crtc);
void (*activate)(struct drm_i915_private *dev_priv);
void (*deactivate)(struct drm_i915_private *dev_priv);
};

131
drivers/gpu/drm/i915/intel_fbc.c
View File

@ -130,11 +130,9 @@ static void i8xx_fbc_deactivate(struct drm_i915_private *dev_priv)
}
}
static void i8xx_fbc_activate(struct intel_crtc *crtc)
static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct drm_framebuffer *fb = crtc->base.primary->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
int cfb_pitch;
int i;
u32 fbc_ctl;
@ -142,9 +140,9 @@ static void i8xx_fbc_activate(struct intel_crtc *crtc)
dev_priv->fbc.active = true;
/* Note: fbc.threshold == 1 for i8xx */
cfb_pitch = intel_fbc_calculate_cfb_size(crtc, fb) / FBC_LL_SIZE;
if (fb->pitches[0] < cfb_pitch)
cfb_pitch = fb->pitches[0];
cfb_pitch = params->cfb_size / FBC_LL_SIZE;
if (params->fb.stride < cfb_pitch)
cfb_pitch = params->fb.stride;
/* FBC_CTL wants 32B or 64B units */
if (IS_GEN2(dev_priv))
@ -161,9 +159,9 @@ static void i8xx_fbc_activate(struct intel_crtc *crtc)
/* Set it up... */
fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
fbc_ctl2 |= FBC_CTL_PLANE(crtc->plane);
fbc_ctl2 |= FBC_CTL_PLANE(params->crtc.plane);
I915_WRITE(FBC_CONTROL2, fbc_ctl2);
I915_WRITE(FBC_FENCE_OFF, get_crtc_fence_y_offset(crtc));
I915_WRITE(FBC_FENCE_OFF, params->crtc.fence_y_offset);
}
/* enable it... */
@ -173,7 +171,7 @@ static void i8xx_fbc_activate(struct intel_crtc *crtc)
if (IS_I945GM(dev_priv))
fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
fbc_ctl |= obj->fence_reg;
fbc_ctl |= params->fb.fence_reg;
I915_WRITE(FBC_CONTROL, fbc_ctl);
}
@ -182,23 +180,21 @@ static bool i8xx_fbc_is_active(struct drm_i915_private *dev_priv)
return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
}
static void g4x_fbc_activate(struct intel_crtc *crtc)
static void g4x_fbc_activate(struct drm_i915_private *dev_priv)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct drm_framebuffer *fb = crtc->base.primary->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
u32 dpfc_ctl;
dev_priv->fbc.active = true;
dpfc_ctl = DPFC_CTL_PLANE(crtc->plane) | DPFC_SR_EN;
if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
dpfc_ctl = DPFC_CTL_PLANE(params->crtc.plane) | DPFC_SR_EN;
if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2)
dpfc_ctl |= DPFC_CTL_LIMIT_2X;
else
dpfc_ctl |= DPFC_CTL_LIMIT_1X;
dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
dpfc_ctl |= DPFC_CTL_FENCE_EN | params->fb.fence_reg;
I915_WRITE(DPFC_FENCE_YOFF, get_crtc_fence_y_offset(crtc));
I915_WRITE(DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
/* enable it... */
I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
@ -230,19 +226,16 @@ static void intel_fbc_recompress(struct drm_i915_private *dev_priv)
POSTING_READ(MSG_FBC_REND_STATE);
}
static void ilk_fbc_activate(struct intel_crtc *crtc)
static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct drm_framebuffer *fb = crtc->base.primary->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
u32 dpfc_ctl;
int threshold = dev_priv->fbc.threshold;
unsigned int y_offset;
dev_priv->fbc.active = true;
dpfc_ctl = DPFC_CTL_PLANE(crtc->plane);
if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
dpfc_ctl = DPFC_CTL_PLANE(params->crtc.plane);
if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2)
threshold++;
switch (threshold) {
@ -259,18 +252,17 @@ static void ilk_fbc_activate(struct intel_crtc *crtc)
}
dpfc_ctl |= DPFC_CTL_FENCE_EN;
if (IS_GEN5(dev_priv))
dpfc_ctl |= obj->fence_reg;
dpfc_ctl |= params->fb.fence_reg;
y_offset = get_crtc_fence_y_offset(crtc);
I915_WRITE(ILK_DPFC_FENCE_YOFF, y_offset);
I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
I915_WRITE(ILK_DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
I915_WRITE(ILK_FBC_RT_BASE, params->fb.ggtt_offset | ILK_FBC_RT_VALID);
/* enable it... */
I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
if (IS_GEN6(dev_priv)) {
I915_WRITE(SNB_DPFC_CTL_SA,
SNB_CPU_FENCE_ENABLE | obj->fence_reg);
I915_WRITE(DPFC_CPU_FENCE_OFFSET, y_offset);
SNB_CPU_FENCE_ENABLE | params->fb.fence_reg);
I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset);
}
intel_fbc_recompress(dev_priv);
@ -295,11 +287,9 @@ static bool ilk_fbc_is_active(struct drm_i915_private *dev_priv)
return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
}
static void gen7_fbc_activate(struct intel_crtc *crtc)
static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct drm_framebuffer *fb = crtc->base.primary->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
u32 dpfc_ctl;
int threshold = dev_priv->fbc.threshold;
@ -307,9 +297,9 @@ static void gen7_fbc_activate(struct intel_crtc *crtc)
dpfc_ctl = 0;
if (IS_IVYBRIDGE(dev_priv))
dpfc_ctl |= IVB_DPFC_CTL_PLANE(crtc->plane);
dpfc_ctl |= IVB_DPFC_CTL_PLANE(params->crtc.plane);
if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2)
threshold++;
switch (threshold) {
@ -337,16 +327,16 @@ static void gen7_fbc_activate(struct intel_crtc *crtc)
ILK_FBCQ_DIS);
} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
/* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */
I915_WRITE(CHICKEN_PIPESL_1(crtc->pipe),
I915_READ(CHICKEN_PIPESL_1(crtc->pipe)) |
I915_WRITE(CHICKEN_PIPESL_1(params->crtc.pipe),
I915_READ(CHICKEN_PIPESL_1(params->crtc.pipe)) |
HSW_FBCQ_DIS);
}
I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
I915_WRITE(SNB_DPFC_CTL_SA,
SNB_CPU_FENCE_ENABLE | obj->fence_reg);
I915_WRITE(DPFC_CPU_FENCE_OFFSET, get_crtc_fence_y_offset(crtc));
SNB_CPU_FENCE_ENABLE | params->fb.fence_reg);
I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset);
intel_fbc_recompress(dev_priv);
}
@ -364,17 +354,6 @@ bool intel_fbc_is_active(struct drm_i915_private *dev_priv)
return dev_priv->fbc.active;
}
static void intel_fbc_activate(const struct drm_framebuffer *fb)
{
struct drm_i915_private *dev_priv = fb->dev->dev_private;
struct intel_crtc *crtc = dev_priv->fbc.crtc;
dev_priv->fbc.activate(crtc);
dev_priv->fbc.fb_id = fb->base.id;
dev_priv->fbc.y = crtc->base.y;
}
static void intel_fbc_work_fn(struct work_struct *__work)
{
struct drm_i915_private *dev_priv =
@ -424,7 +403,7 @@ retry:
}
if (crtc->base.primary->fb == work->fb)
intel_fbc_activate(work->fb);
dev_priv->fbc.activate(dev_priv);
work->scheduled = false;
@ -855,6 +834,42 @@ static bool intel_fbc_can_enable(struct intel_crtc *crtc)
return true;
}
static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
struct intel_fbc_reg_params *params)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct drm_framebuffer *fb = crtc->base.primary->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
/* Since all our fields are integer types, use memset here so the
* comparison function can rely on memcmp because the padding will be
* zero. */
memset(params, 0, sizeof(*params));
params->crtc.pipe = crtc->pipe;
params->crtc.plane = crtc->plane;
params->crtc.fence_y_offset = get_crtc_fence_y_offset(crtc);
params->fb.id = fb->base.id;
params->fb.pixel_format = fb->pixel_format;
params->fb.stride = fb->pitches[0];
params->fb.fence_reg = obj->fence_reg;
params->cfb_size = intel_fbc_calculate_cfb_size(crtc, fb);
/* FIXME: We lack the proper locking here, so only run this on the
* platforms that need. */
if (dev_priv->fbc.activate == ilk_fbc_activate)
params->fb.ggtt_offset = i915_gem_obj_ggtt_offset(obj);
}
static bool intel_fbc_reg_params_equal(struct intel_fbc_reg_params *params1,
struct intel_fbc_reg_params *params2)
{
/* We can use this since intel_fbc_get_reg_params() does a memset. */
return memcmp(params1, params2, sizeof(*params1)) == 0;
}
/**
* __intel_fbc_update - activate/deactivate FBC as needed, unlocked
* @crtc: the CRTC that triggered the update
@ -865,6 +880,7 @@ static bool intel_fbc_can_enable(struct intel_crtc *crtc)
static void __intel_fbc_update(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc_reg_params old_params;
WARN_ON(!mutex_is_locked(&dev_priv->fbc.lock));
@ -879,15 +895,16 @@ static void __intel_fbc_update(struct intel_crtc *crtc)
if (!intel_fbc_can_activate(crtc))
goto out_disable;
old_params = dev_priv->fbc.params;
intel_fbc_get_reg_params(crtc, &dev_priv->fbc.params);
/* If the scanout has not changed, don't modify the FBC settings.
* Note that we make the fundamental assumption that the fb->obj
* cannot be unpinned (and have its GTT offset and fence revoked)
* without first being decoupled from the scanout and FBC disabled.
*/
if (dev_priv->fbc.crtc == crtc &&
dev_priv->fbc.fb_id == crtc->base.primary->fb->base.id &&
dev_priv->fbc.y == crtc->base.y &&
dev_priv->fbc.active)
if (dev_priv->fbc.active &&
intel_fbc_reg_params_equal(&old_params, &dev_priv->fbc.params))
return;
if (intel_fbc_is_active(dev_priv)) {