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drm/i916: Refactor WM register maximums

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We will have another use for the maximum watermark values that the
registers can hold. Pull those out into separate functions.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-03-07 18:32:11 +02:00 committed by Daniel Vetter
parent fe392efdae
commit 4e97508123
1 changed files with 37 additions and 29 deletions
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66
drivers/gpu/drm/i915/intel_pm.c
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@ -1821,6 +1821,40 @@ static unsigned int ilk_display_fifo_size(const struct drm_device *dev)
return 512;
}
static unsigned int ilk_plane_wm_reg_max(const struct drm_device *dev,
int level, bool is_sprite)
{
if (INTEL_INFO(dev)->gen >= 8)
/* BDW primary/sprite plane watermarks */
return level == 0 ? 255 : 2047;
else if (INTEL_INFO(dev)->gen >= 7)
/* IVB/HSW primary/sprite plane watermarks */
return level == 0 ? 127 : 1023;
else if (!is_sprite)
/* ILK/SNB primary plane watermarks */
return level == 0 ? 127 : 511;
else
/* ILK/SNB sprite plane watermarks */
return level == 0 ? 63 : 255;
}
static unsigned int ilk_cursor_wm_reg_max(const struct drm_device *dev,
int level)
{
if (INTEL_INFO(dev)->gen >= 7)
return level == 0 ? 63 : 255;
else
return level == 0 ? 31 : 63;
}
static unsigned int ilk_fbc_wm_reg_max(const struct drm_device *dev)
{
if (INTEL_INFO(dev)->gen >= 8)
return 31;
else
return 15;
}
/* Calculate the maximum primary/sprite plane watermark */
static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
int level,
@ -1829,7 +1863,6 @@ static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
bool is_sprite)
{
unsigned int fifo_size = ilk_display_fifo_size(dev);
unsigned int max;
/* if sprites aren't enabled, sprites get nothing */
if (is_sprite && !config->sprites_enabled)
@ -1860,19 +1893,7 @@ static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
}
/* clamp to max that the registers can hold */
if (INTEL_INFO(dev)->gen >= 8)
max = level == 0 ? 255 : 2047;
else if (INTEL_INFO(dev)->gen >= 7)
/* IVB/HSW primary/sprite plane watermarks */
max = level == 0 ? 127 : 1023;
else if (!is_sprite)
/* ILK/SNB primary plane watermarks */
max = level == 0 ? 127 : 511;
else
/* ILK/SNB sprite plane watermarks */
max = level == 0 ? 63 : 255;
return min(fifo_size, max);
return min(fifo_size, ilk_plane_wm_reg_max(dev, level, is_sprite));
}
/* Calculate the maximum cursor plane watermark */
@ -1885,20 +1906,7 @@ static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
return 64;
/* otherwise just report max that registers can hold */
if (INTEL_INFO(dev)->gen >= 7)
return level == 0 ? 63 : 255;
else
return level == 0 ? 31 : 63;
}
/* Calculate the maximum FBC watermark */
static unsigned int ilk_fbc_wm_max(const struct drm_device *dev)
{
/* max that registers can hold */
if (INTEL_INFO(dev)->gen >= 8)
return 31;
else
return 15;
return ilk_cursor_wm_reg_max(dev, level);
}
static void ilk_compute_wm_maximums(const struct drm_device *dev,
@ -1910,7 +1918,7 @@ static void ilk_compute_wm_maximums(const struct drm_device *dev,
max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
max->cur = ilk_cursor_wm_max(dev, level, config);
max->fbc = ilk_fbc_wm_max(dev);
max->fbc = ilk_fbc_wm_reg_max(dev);
}
static bool ilk_validate_wm_level(int level,