From: Paulo Zanoni <paulo.r.zanoni at intel.com>
This is all the code responsible for setting the PCH PLLs.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 260 ++++++++++++++++++++--------------
1 file changed, 153 insertions(+), 107 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index dc4132a..7ffbcfd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4884,6 +4884,143 @@ static bool ironlake_compute_clocks(struct drm_crtc *crtc,
return true;
}
+static bool ironlake_pch_pll_set(struct drm_crtc *crtc,
+ struct drm_display_mode *adjusted_mode,
+ 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;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ struct intel_encoder *intel_encoder;
+ int num_connectors = 0;
+ u32 dpll, fp = 0, fp2 = 0;
+ int factor, pixel_multiplier;
+ struct intel_pch_pll *pll;
+ bool is_lvds = false, is_sdvo = false, is_tv = false;
+ bool is_dp = false, is_cpu_edp = false;
+
+ for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
+ switch (intel_encoder->type) {
+ case INTEL_OUTPUT_LVDS:
+ is_lvds = true;
+ break;
+ case INTEL_OUTPUT_SDVO:
+ case INTEL_OUTPUT_HDMI:
+ is_sdvo = true;
+ if (intel_encoder->needs_tv_clock)
+ is_tv = true;
+ break;
+ case INTEL_OUTPUT_TVOUT:
+ is_tv = true;
+ break;
+ case INTEL_OUTPUT_DISPLAYPORT:
+ is_dp = true;
+ break;
+ case INTEL_OUTPUT_EDP:
+ is_dp = true;
+ if (!intel_encoder_is_pch_edp(&intel_encoder->base))
+ is_cpu_edp = true;
+ break;
+ }
+
+ num_connectors++;
+ }
+
+ fp = clock->n << 16 | clock->m1 << 8 | clock->m2;
+ if (has_reduced_clock)
+ fp2 = reduced_clock->n << 16 | reduced_clock->m1 << 8 |
+ reduced_clock->m2;
+
+ /* Enable autotuning of the PLL clock (if permissible) */
+ factor = 21;
+ if (is_lvds) {
+ if ((intel_panel_use_ssc(dev_priv) &&
+ dev_priv->lvds_ssc_freq == 100) ||
+ (I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
+ factor = 25;
+ } else if (is_sdvo && is_tv)
+ factor = 20;
+
+ if (clock->m < factor * clock->n)
+ fp |= FP_CB_TUNE;
+
+ dpll = 0;
+
+ if (is_lvds)
+ dpll |= DPLLB_MODE_LVDS;
+ else
+ dpll |= DPLLB_MODE_DAC_SERIAL;
+ if (is_sdvo) {
+ pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
+ if (pixel_multiplier > 1) {
+ dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
+ }
+ dpll |= DPLL_DVO_HIGH_SPEED;
+ }
+ if (is_dp && !is_cpu_edp)
+ dpll |= DPLL_DVO_HIGH_SPEED;
+
+ /* compute bitmask from p1 value */
+ dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+ /* also FPA1 */
+ dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
+
+ switch (clock->p2) {
+ case 5:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+ break;
+ case 7:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+ break;
+ case 10:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+ break;
+ case 14:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+ break;
+ }
+
+ if (is_sdvo && is_tv)
+ dpll |= PLL_REF_INPUT_TVCLKINBC;
+ else if (is_tv)
+ /* XXX: just matching BIOS for now */
+ /* dpll |= PLL_REF_INPUT_TVCLKINBC; */
+ dpll |= 3;
+ else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
+ dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+ else
+ dpll |= PLL_REF_INPUT_DREFCLK;
+
+ pll = intel_get_pch_pll(intel_crtc, dpll, fp);
+ if (!pll)
+ return false;
+
+ I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
+
+ /* Wait for the clocks to stabilize. */
+ POSTING_READ(intel_crtc->pch_pll->pll_reg);
+ udelay(150);
+
+ /* The pixel multiplier can only be updated once the
+ * DPLL is enabled and the clocks are stable.
+ *
+ * So write it again.
+ */
+ I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
+
+ intel_crtc->lowfreq_avail = false;
+ if (is_lvds && has_reduced_clock && i915_powersave) {
+ I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp2);
+ intel_crtc->lowfreq_avail = true;
+ } else {
+ I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp);
+ }
+
+ return true;
+}
+
static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode,
@@ -4897,11 +5034,10 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
int plane = intel_crtc->plane;
int num_connectors = 0;
intel_clock_t clock, reduced_clock;
- u32 dpll, fp = 0, fp2 = 0;
bool ok, has_reduced_clock = false, is_sdvo = false;
bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
struct intel_encoder *encoder;
- int ret, factor;
+ int ret;
unsigned int pipe_bpp;
bool dither;
bool is_cpu_edp = false, is_pch_edp = false;
@@ -4961,90 +5097,25 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
}
intel_crtc->bpp = pipe_bpp;
- fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
- if (has_reduced_clock)
- fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
- reduced_clock.m2;
-
- /* Enable autotuning of the PLL clock (if permissible) */
- factor = 21;
- if (is_lvds) {
- if ((intel_panel_use_ssc(dev_priv) &&
- dev_priv->lvds_ssc_freq == 100) ||
- (I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
- factor = 25;
- } else if (is_sdvo && is_tv)
- factor = 20;
-
- if (clock.m < factor * clock.n)
- fp |= FP_CB_TUNE;
-
- dpll = 0;
-
- if (is_lvds)
- dpll |= DPLLB_MODE_LVDS;
- else
- dpll |= DPLLB_MODE_DAC_SERIAL;
- if (is_sdvo) {
- int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
- if (pixel_multiplier > 1) {
- dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
- }
- dpll |= DPLL_DVO_HIGH_SPEED;
- }
- if (is_dp && !is_cpu_edp)
- dpll |= DPLL_DVO_HIGH_SPEED;
-
- /* compute bitmask from p1 value */
- dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
- /* also FPA1 */
- dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
-
- switch (clock.p2) {
- case 5:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
- break;
- case 7:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
- break;
- case 10:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
- break;
- case 14:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
- break;
- }
-
- if (is_sdvo && is_tv)
- dpll |= PLL_REF_INPUT_TVCLKINBC;
- else if (is_tv)
- /* XXX: just matching BIOS for now */
- /* dpll |= PLL_REF_INPUT_TVCLKINBC; */
- dpll |= 3;
- else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
- dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
- else
- dpll |= PLL_REF_INPUT_DREFCLK;
-
DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
drm_mode_debug_printmodeline(mode);
- /* CPU eDP is the only output that doesn't need a PCH PLL of its own on
- * pre-Haswell/LPT generation */
- if (HAS_PCH_LPT(dev)) {
- DRM_DEBUG_KMS("LPT detected: no PLL for pipe %d necessary\n",
- pipe);
- } else if (!is_cpu_edp) {
- struct intel_pch_pll *pll;
-
- pll = intel_get_pch_pll(intel_crtc, dpll, fp);
- if (pll == NULL) {
- DRM_DEBUG_DRIVER("failed to find PLL for pipe %d\n",
- pipe);
- return -EINVAL;
+ if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
+ /* CPU eDP is the only output that doesn't need a PCH PLL of its
+ * own */
+ if (is_cpu_edp) {
+ intel_put_pch_pll(intel_crtc);
+ } else {
+ ok = ironlake_pch_pll_set(crtc, adjusted_mode, &clock,
+ has_reduced_clock,
+ &reduced_clock);
+ if (!ok) {
+ DRM_ERROR("Failed to find PLL for pipe %d\n",
+ pipe);
+ return -EINVAL;
+ }
}
- } else
- intel_put_pch_pll(intel_crtc);
+ }
/* The LVDS pin pair needs to be on before the DPLLs are enabled.
* This is an exception to the general rule that mode_set doesn't turn
@@ -5055,31 +5126,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
ironlake_set_m_n(crtc, mode, adjusted_mode);
- if (intel_crtc->pch_pll) {
- I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
-
- /* Wait for the clocks to stabilize. */
- POSTING_READ(intel_crtc->pch_pll->pll_reg);
- udelay(150);
-
- /* The pixel multiplier can only be updated once the
- * DPLL is enabled and the clocks are stable.
- *
- * So write it again.
- */
- I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
- }
-
- intel_crtc->lowfreq_avail = false;
- if (intel_crtc->pch_pll) {
- if (is_lvds && has_reduced_clock && i915_powersave) {
- I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp2);
- intel_crtc->lowfreq_avail = true;
- } else {
- I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp);
- }
- }
-
ironlake_set_pipe_timings(intel_crtc, mode, adjusted_mode);
if (is_cpu_edp)
--
1.7.10.4
