diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2014-06-28 02:03:57 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-08-08 17:43:41 +0200 |
| commit | 383c5a6a4682f6816fb5a07aebd89c5813c3d1c7 (patch) | |
| tree | f62f5d59000d4075cd83b841c2bea368cbb04bd5 | |
| parent | 06ffc7789e76a095e85814dbcf7b660344f6b679 (diff) | |
drm/i915: Add cdclk change support for chv
Looks like the Punit is supposed to support the 400MHz cdclk directly on
chv, so we don't need the vlv tricks.
FIXME: Punit doesn't seem ready for this yet on current hw
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 50 |
2 files changed, 52 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e355fc8d4d5..697c04976cd 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -497,6 +497,10 @@ #define BUNIT_REG_BISOC 0x11 #define PUNIT_REG_DSPFREQ 0x36 +#define DSPFREQSTAT_SHIFT_CHV 24 +#define DSPFREQSTAT_MASK_CHV (0x1f << DSPFREQSTAT_SHIFT_CHV) +#define DSPFREQGUAR_SHIFT_CHV 8 +#define DSPFREQGUAR_MASK_CHV (0x1f << DSPFREQGUAR_SHIFT_CHV) #define DSPFREQSTAT_SHIFT 30 #define DSPFREQSTAT_MASK (0x3 << DSPFREQSTAT_SHIFT) #define DSPFREQGUAR_SHIFT 14 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c3bb5f7fd21..fdf5ec88866 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4501,6 +4501,47 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk) vlv_update_cdclk(dev); } +static void cherryview_set_cdclk(struct drm_device *dev, int cdclk) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 val, cmd; + + WARN_ON(dev_priv->display.get_display_clock_speed(dev) != dev_priv->vlv_cdclk_freq); + + switch (cdclk) { + case 400000: + cmd = 3; + break; + case 333333: + case 320000: + cmd = 2; + break; + case 266667: + cmd = 1; + break; + case 200000: + cmd = 0; + break; + default: + WARN_ON(1); + return; + } + + mutex_lock(&dev_priv->rps.hw_lock); + val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); + val &= ~DSPFREQGUAR_MASK_CHV; + val |= (cmd << DSPFREQGUAR_SHIFT_CHV); + vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val); + if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & + DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV), + 50)) { + DRM_ERROR("timed out waiting for CDclk change\n"); + } + mutex_unlock(&dev_priv->rps.hw_lock); + + vlv_update_cdclk(dev); +} + static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv, int max_pixclk) { @@ -4569,8 +4610,13 @@ static void valleyview_modeset_global_resources(struct drm_device *dev) int max_pixclk = intel_mode_max_pixclk(dev_priv); int req_cdclk = valleyview_calc_cdclk(dev_priv, max_pixclk); - if (req_cdclk != dev_priv->vlv_cdclk_freq) - valleyview_set_cdclk(dev, req_cdclk); + if (req_cdclk != dev_priv->vlv_cdclk_freq) { + if (IS_CHERRYVIEW(dev)) + cherryview_set_cdclk(dev, req_cdclk); + else + valleyview_set_cdclk(dev, req_cdclk); + } + modeset_update_crtc_power_domains(dev); } |