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drm/i915: Merge ironlake_compute_clocks() and ironlake_crtc_compute_clock()

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Merge ironlake_compute_clocks() into ironlake_crtc_compute_clock() so
the clock computation logic is all in one place. The resulting function
is still quite simple. Follow up patches will make the similar code for
GMCH platforms look similar.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458576016-30348-12-git-send-email-ander.conselvan.de.oliveira@intel.com
This commit is contained in:
Ander Conselvan de Oliveira 2016-03-21 18:00:12 +02:00
parent b75ca6f62e
commit 997c030cfd
1 changed files with 33 additions and 53 deletions
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86
drivers/gpu/drm/i915/intel_display.c
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@ -846,6 +846,11 @@ pnv_find_best_dpll(const intel_limit_t *limit,
return (err != target);
}
/*
* Returns a set of divisors for the desired target clock with the given
* refclk, or FALSE. The returned values represent the clock equation:
* reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
*/
static bool
g4x_find_best_dpll(const intel_limit_t *limit,
struct intel_crtc_state *crtc_state,
@ -8628,55 +8633,6 @@ static void haswell_set_pipemisc(struct drm_crtc *crtc)
}
}
static bool ironlake_compute_clocks(struct drm_crtc *crtc,
struct intel_crtc_state *crtc_state,
intel_clock_t *clock,
bool *has_reduced_clock,
intel_clock_t *reduced_clock)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int refclk;
const intel_limit_t *limit;
bool ret;
refclk = 120000;
if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS)) {
if (intel_panel_use_ssc(dev_priv)) {
DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n",
dev_priv->vbt.lvds_ssc_freq);
refclk = dev_priv->vbt.lvds_ssc_freq;
}
if (intel_is_dual_link_lvds(dev)) {
if (refclk == 100000)
limit = &intel_limits_ironlake_dual_lvds_100m;
else
limit = &intel_limits_ironlake_dual_lvds;
} else {
if (refclk == 100000)
limit = &intel_limits_ironlake_single_lvds_100m;
else
limit = &intel_limits_ironlake_single_lvds;
}
} else {
limit = &intel_limits_ironlake_dac;
}
/*
* Returns a set of divisors for the desired target clock with the given
* refclk, or FALSE. The returned values represent the clock equation:
* reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
*/
ret = g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
refclk, NULL, clock);
if (!ret)
return false;
return true;
}
int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
{
/*
@ -8801,9 +8757,13 @@ static void ironlake_compute_dpll(struct intel_crtc *intel_crtc,
static int ironlake_crtc_compute_clock(struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
intel_clock_t reduced_clock;
bool has_reduced_clock = false;
struct intel_shared_dpll *pll;
const intel_limit_t *limit;
int refclk = 120000;
memset(&crtc_state->dpll_hw_state, 0,
sizeof(crtc_state->dpll_hw_state));
@ -8814,11 +8774,31 @@ static int ironlake_crtc_compute_clock(struct intel_crtc *crtc,
if (!crtc_state->has_pch_encoder)
return 0;
if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS)) {
if (intel_panel_use_ssc(dev_priv)) {
DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n",
dev_priv->vbt.lvds_ssc_freq);
refclk = dev_priv->vbt.lvds_ssc_freq;
}
if (intel_is_dual_link_lvds(dev)) {
if (refclk == 100000)
limit = &intel_limits_ironlake_dual_lvds_100m;
else
limit = &intel_limits_ironlake_dual_lvds;
} else {
if (refclk == 100000)
limit = &intel_limits_ironlake_single_lvds_100m;
else
limit = &intel_limits_ironlake_single_lvds;
}
} else {
limit = &intel_limits_ironlake_dac;
}
if (!crtc_state->clock_set &&
!ironlake_compute_clocks(&crtc->base, crtc_state,
&crtc_state->dpll,
&has_reduced_clock,
&reduced_clock)) {
!g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
refclk, NULL, &crtc_state->dpll)) {
DRM_ERROR("Couldn't find PLL settings for mode!\n");
return -EINVAL;
}