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path: root/drivers/gpu/drm/i915/display/intel_dpll.c
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Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dpll.c')
-rw-r--r--drivers/gpu/drm/i915/display/intel_dpll.c519
1 files changed, 514 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c b/drivers/gpu/drm/i915/display/intel_dpll.c
index 7ba7f315aaee..3e3c5eed1600 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll.c
@@ -3,11 +3,13 @@
* Copyright © 2020 Intel Corporation
*/
#include <linux/kernel.h>
+#include "intel_crtc.h"
#include "intel_display_types.h"
#include "intel_display.h"
#include "intel_dpll.h"
#include "intel_lvds.h"
#include "intel_panel.h"
+#include "intel_sideband.h"
struct intel_limit {
struct {
@@ -845,7 +847,7 @@ static void i9xx_compute_dpll(struct intel_crtc *crtc,
dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
break;
}
- if (INTEL_GEN(dev_priv) >= 4)
+ if (DISPLAY_VER(dev_priv) >= 4)
dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
if (crtc_state->sdvo_tv_clock)
@@ -859,7 +861,7 @@ static void i9xx_compute_dpll(struct intel_crtc *crtc,
dpll |= DPLL_VCO_ENABLE;
crtc_state->dpll_hw_state.dpll = dpll;
- if (INTEL_GEN(dev_priv) >= 4) {
+ if (DISPLAY_VER(dev_priv) >= 4) {
u32 dpll_md = (crtc_state->pixel_multiplier - 1)
<< DPLL_MD_UDI_MULTIPLIER_SHIFT;
crtc_state->dpll_hw_state.dpll_md = dpll_md;
@@ -924,7 +926,7 @@ static int hsw_crtc_compute_clock(struct intel_crtc *crtc,
to_intel_atomic_state(crtc_state->uapi.state);
if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
- INTEL_GEN(dev_priv) >= 11) {
+ DISPLAY_VER(dev_priv) >= 11) {
struct intel_encoder *encoder =
intel_get_crtc_new_encoder(state, crtc_state);
@@ -1344,7 +1346,7 @@ static int i8xx_crtc_compute_clock(struct intel_crtc *crtc,
void
intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
{
- if (INTEL_GEN(dev_priv) >= 9 || HAS_DDI(dev_priv))
+ if (DISPLAY_VER(dev_priv) >= 9 || HAS_DDI(dev_priv))
dev_priv->display.crtc_compute_clock = hsw_crtc_compute_clock;
else if (HAS_PCH_SPLIT(dev_priv))
dev_priv->display.crtc_compute_clock = ilk_crtc_compute_clock;
@@ -1356,8 +1358,515 @@ intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
dev_priv->display.crtc_compute_clock = g4x_crtc_compute_clock;
else if (IS_PINEVIEW(dev_priv))
dev_priv->display.crtc_compute_clock = pnv_crtc_compute_clock;
- else if (!IS_GEN(dev_priv, 2))
+ else if (!IS_DISPLAY_VER(dev_priv, 2))
dev_priv->display.crtc_compute_clock = i9xx_crtc_compute_clock;
else
dev_priv->display.crtc_compute_clock = i8xx_crtc_compute_clock;
}
+
+static bool i9xx_has_pps(struct drm_i915_private *dev_priv)
+{
+ if (IS_I830(dev_priv))
+ return false;
+
+ return IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
+}
+
+void i9xx_enable_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ i915_reg_t reg = DPLL(crtc->pipe);
+ u32 dpll = crtc_state->dpll_hw_state.dpll;
+ int i;
+
+ assert_pipe_disabled(dev_priv, crtc_state->cpu_transcoder);
+
+ /* PLL is protected by panel, make sure we can write it */
+ if (i9xx_has_pps(dev_priv))
+ assert_panel_unlocked(dev_priv, crtc->pipe);
+
+ /*
+ * Apparently we need to have VGA mode enabled prior to changing
+ * the P1/P2 dividers. Otherwise the DPLL will keep using the old
+ * dividers, even though the register value does change.
+ */
+ intel_de_write(dev_priv, reg, dpll & ~DPLL_VGA_MODE_DIS);
+ intel_de_write(dev_priv, reg, dpll);
+
+ /* Wait for the clocks to stabilize. */
+ intel_de_posting_read(dev_priv, reg);
+ udelay(150);
+
+ if (DISPLAY_VER(dev_priv) >= 4) {
+ intel_de_write(dev_priv, DPLL_MD(crtc->pipe),
+ crtc_state->dpll_hw_state.dpll_md);
+ } else {
+ /* The pixel multiplier can only be updated once the
+ * DPLL is enabled and the clocks are stable.
+ *
+ * So write it again.
+ */
+ intel_de_write(dev_priv, reg, dpll);
+ }
+
+ /* We do this three times for luck */
+ for (i = 0; i < 3; i++) {
+ intel_de_write(dev_priv, reg, dpll);
+ intel_de_posting_read(dev_priv, reg);
+ udelay(150); /* wait for warmup */
+ }
+}
+
+static void vlv_pllb_recal_opamp(struct drm_i915_private *dev_priv,
+ enum pipe pipe)
+{
+ u32 reg_val;
+
+ /*
+ * PLLB opamp always calibrates to max value of 0x3f, force enable it
+ * and set it to a reasonable value instead.
+ */
+ reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW9(1));
+ reg_val &= 0xffffff00;
+ reg_val |= 0x00000030;
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9(1), reg_val);
+
+ reg_val = vlv_dpio_read(dev_priv, pipe, VLV_REF_DW13);
+ reg_val &= 0x00ffffff;
+ reg_val |= 0x8c000000;
+ vlv_dpio_write(dev_priv, pipe, VLV_REF_DW13, reg_val);
+
+ reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW9(1));
+ reg_val &= 0xffffff00;
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9(1), reg_val);
+
+ reg_val = vlv_dpio_read(dev_priv, pipe, VLV_REF_DW13);
+ reg_val &= 0x00ffffff;
+ reg_val |= 0xb0000000;
+ vlv_dpio_write(dev_priv, pipe, VLV_REF_DW13, reg_val);
+}
+
+static void _vlv_enable_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+
+ intel_de_write(dev_priv, DPLL(pipe), pipe_config->dpll_hw_state.dpll);
+ intel_de_posting_read(dev_priv, DPLL(pipe));
+ udelay(150);
+
+ if (intel_de_wait_for_set(dev_priv, DPLL(pipe), DPLL_LOCK_VLV, 1))
+ drm_err(&dev_priv->drm, "DPLL %d failed to lock\n", pipe);
+}
+
+void vlv_enable_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+
+ assert_pipe_disabled(dev_priv, pipe_config->cpu_transcoder);
+
+ /* PLL is protected by panel, make sure we can write it */
+ assert_panel_unlocked(dev_priv, pipe);
+
+ if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
+ _vlv_enable_pll(crtc, pipe_config);
+
+ intel_de_write(dev_priv, DPLL_MD(pipe),
+ pipe_config->dpll_hw_state.dpll_md);
+ intel_de_posting_read(dev_priv, DPLL_MD(pipe));
+}
+
+
+static void _chv_enable_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ enum dpio_channel port = vlv_pipe_to_channel(pipe);
+ u32 tmp;
+
+ vlv_dpio_get(dev_priv);
+
+ /* Enable back the 10bit clock to display controller */
+ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
+ tmp |= DPIO_DCLKP_EN;
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), tmp);
+
+ vlv_dpio_put(dev_priv);
+
+ /*
+ * Need to wait > 100ns between dclkp clock enable bit and PLL enable.
+ */
+ udelay(1);
+
+ /* Enable PLL */
+ intel_de_write(dev_priv, DPLL(pipe), pipe_config->dpll_hw_state.dpll);
+
+ /* Check PLL is locked */
+ if (intel_de_wait_for_set(dev_priv, DPLL(pipe), DPLL_LOCK_VLV, 1))
+ drm_err(&dev_priv->drm, "PLL %d failed to lock\n", pipe);
+}
+
+void chv_enable_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+
+ assert_pipe_disabled(dev_priv, pipe_config->cpu_transcoder);
+
+ /* PLL is protected by panel, make sure we can write it */
+ assert_panel_unlocked(dev_priv, pipe);
+
+ if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
+ _chv_enable_pll(crtc, pipe_config);
+
+ if (pipe != PIPE_A) {
+ /*
+ * WaPixelRepeatModeFixForC0:chv
+ *
+ * DPLLCMD is AWOL. Use chicken bits to propagate
+ * the value from DPLLBMD to either pipe B or C.
+ */
+ intel_de_write(dev_priv, CBR4_VLV, CBR_DPLLBMD_PIPE(pipe));
+ intel_de_write(dev_priv, DPLL_MD(PIPE_B),
+ pipe_config->dpll_hw_state.dpll_md);
+ intel_de_write(dev_priv, CBR4_VLV, 0);
+ dev_priv->chv_dpll_md[pipe] = pipe_config->dpll_hw_state.dpll_md;
+
+ /*
+ * DPLLB VGA mode also seems to cause problems.
+ * We should always have it disabled.
+ */
+ drm_WARN_ON(&dev_priv->drm,
+ (intel_de_read(dev_priv, DPLL(PIPE_B)) &
+ DPLL_VGA_MODE_DIS) == 0);
+ } else {
+ intel_de_write(dev_priv, DPLL_MD(pipe),
+ pipe_config->dpll_hw_state.dpll_md);
+ intel_de_posting_read(dev_priv, DPLL_MD(pipe));
+ }
+}
+
+void vlv_prepare_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ enum pipe pipe = crtc->pipe;
+ u32 mdiv;
+ u32 bestn, bestm1, bestm2, bestp1, bestp2;
+ u32 coreclk, reg_val;
+
+ /* Enable Refclk */
+ intel_de_write(dev_priv, DPLL(pipe),
+ pipe_config->dpll_hw_state.dpll & ~(DPLL_VCO_ENABLE | DPLL_EXT_BUFFER_ENABLE_VLV));
+
+ /* No need to actually set up the DPLL with DSI */
+ if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+ return;
+
+ vlv_dpio_get(dev_priv);
+
+ bestn = pipe_config->dpll.n;
+ bestm1 = pipe_config->dpll.m1;
+ bestm2 = pipe_config->dpll.m2;
+ bestp1 = pipe_config->dpll.p1;
+ bestp2 = pipe_config->dpll.p2;
+
+ /* See eDP HDMI DPIO driver vbios notes doc */
+
+ /* PLL B needs special handling */
+ if (pipe == PIPE_B)
+ vlv_pllb_recal_opamp(dev_priv, pipe);
+
+ /* Set up Tx target for periodic Rcomp update */
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9_BCAST, 0x0100000f);
+
+ /* Disable target IRef on PLL */
+ reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW8(pipe));
+ reg_val &= 0x00ffffff;
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW8(pipe), reg_val);
+
+ /* Disable fast lock */
+ vlv_dpio_write(dev_priv, pipe, VLV_CMN_DW0, 0x610);
+
+ /* Set idtafcrecal before PLL is enabled */
+ mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
+ mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
+ mdiv |= ((bestn << DPIO_N_SHIFT));
+ mdiv |= (1 << DPIO_K_SHIFT);
+
+ /*
+ * Post divider depends on pixel clock rate, DAC vs digital (and LVDS,
+ * but we don't support that).
+ * Note: don't use the DAC post divider as it seems unstable.
+ */
+ mdiv |= (DPIO_POST_DIV_HDMIDP << DPIO_POST_DIV_SHIFT);
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW3(pipe), mdiv);
+
+ mdiv |= DPIO_ENABLE_CALIBRATION;
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW3(pipe), mdiv);
+
+ /* Set HBR and RBR LPF coefficients */
+ if (pipe_config->port_clock == 162000 ||
+ intel_crtc_has_type(pipe_config, INTEL_OUTPUT_ANALOG) ||
+ intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW10(pipe),
+ 0x009f0003);
+ else
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW10(pipe),
+ 0x00d0000f);
+
+ if (intel_crtc_has_dp_encoder(pipe_config)) {
+ /* Use SSC source */
+ if (pipe == PIPE_A)
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+ 0x0df40000);
+ else
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+ 0x0df70000);
+ } else { /* HDMI or VGA */
+ /* Use bend source */
+ if (pipe == PIPE_A)
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+ 0x0df70000);
+ else
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+ 0x0df40000);
+ }
+
+ coreclk = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW7(pipe));
+ coreclk = (coreclk & 0x0000ff00) | 0x01c00000;
+ if (intel_crtc_has_dp_encoder(pipe_config))
+ coreclk |= 0x01000000;
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW7(pipe), coreclk);
+
+ vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW11(pipe), 0x87871000);
+
+ vlv_dpio_put(dev_priv);
+}
+
+void chv_prepare_pll(struct intel_crtc *crtc,
+ const struct intel_crtc_state *pipe_config)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ enum pipe pipe = crtc->pipe;
+ enum dpio_channel port = vlv_pipe_to_channel(pipe);
+ u32 loopfilter, tribuf_calcntr;
+ u32 bestn, bestm1, bestm2, bestp1, bestp2, bestm2_frac;
+ u32 dpio_val;
+ int vco;
+
+ /* Enable Refclk and SSC */
+ intel_de_write(dev_priv, DPLL(pipe),
+ pipe_config->dpll_hw_state.dpll & ~DPLL_VCO_ENABLE);
+
+ /* No need to actually set up the DPLL with DSI */
+ if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+ return;
+
+ bestn = pipe_config->dpll.n;
+ bestm2_frac = pipe_config->dpll.m2 & 0x3fffff;
+ bestm1 = pipe_config->dpll.m1;
+ bestm2 = pipe_config->dpll.m2 >> 22;
+ bestp1 = pipe_config->dpll.p1;
+ bestp2 = pipe_config->dpll.p2;
+ vco = pipe_config->dpll.vco;
+ dpio_val = 0;
+ loopfilter = 0;
+
+ vlv_dpio_get(dev_priv);
+
+ /* p1 and p2 divider */
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW13(port),
+ 5 << DPIO_CHV_S1_DIV_SHIFT |
+ bestp1 << DPIO_CHV_P1_DIV_SHIFT |
+ bestp2 << DPIO_CHV_P2_DIV_SHIFT |
+ 1 << DPIO_CHV_K_DIV_SHIFT);
+
+ /* Feedback post-divider - m2 */
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW0(port), bestm2);
+
+ /* Feedback refclk divider - n and m1 */
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW1(port),
+ DPIO_CHV_M1_DIV_BY_2 |
+ 1 << DPIO_CHV_N_DIV_SHIFT);
+
+ /* M2 fraction division */
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW2(port), bestm2_frac);
+
+ /* M2 fraction division enable */
+ dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW3(port));
+ dpio_val &= ~(DPIO_CHV_FEEDFWD_GAIN_MASK | DPIO_CHV_FRAC_DIV_EN);
+ dpio_val |= (2 << DPIO_CHV_FEEDFWD_GAIN_SHIFT);
+ if (bestm2_frac)
+ dpio_val |= DPIO_CHV_FRAC_DIV_EN;
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW3(port), dpio_val);
+
+ /* Program digital lock detect threshold */
+ dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW9(port));
+ dpio_val &= ~(DPIO_CHV_INT_LOCK_THRESHOLD_MASK |
+ DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE);
+ dpio_val |= (0x5 << DPIO_CHV_INT_LOCK_THRESHOLD_SHIFT);
+ if (!bestm2_frac)
+ dpio_val |= DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE;
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW9(port), dpio_val);
+
+ /* Loop filter */
+ if (vco == 5400000) {
+ loopfilter |= (0x3 << DPIO_CHV_PROP_COEFF_SHIFT);
+ loopfilter |= (0x8 << DPIO_CHV_INT_COEFF_SHIFT);
+ loopfilter |= (0x1 << DPIO_CHV_GAIN_CTRL_SHIFT);
+ tribuf_calcntr = 0x9;
+ } else if (vco <= 6200000) {
+ loopfilter |= (0x5 << DPIO_CHV_PROP_COEFF_SHIFT);
+ loopfilter |= (0xB << DPIO_CHV_INT_COEFF_SHIFT);
+ loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+ tribuf_calcntr = 0x9;
+ } else if (vco <= 6480000) {
+ loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT);
+ loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT);
+ loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+ tribuf_calcntr = 0x8;
+ } else {
+ /* Not supported. Apply the same limits as in the max case */
+ loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT);
+ loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT);
+ loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+ tribuf_calcntr = 0;
+ }
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW6(port), loopfilter);
+
+ dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW8(port));
+ dpio_val &= ~DPIO_CHV_TDC_TARGET_CNT_MASK;
+ dpio_val |= (tribuf_calcntr << DPIO_CHV_TDC_TARGET_CNT_SHIFT);
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW8(port), dpio_val);
+
+ /* AFC Recal */
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port),
+ vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)) |
+ DPIO_AFC_RECAL);
+
+ vlv_dpio_put(dev_priv);
+}
+
+/**
+ * vlv_force_pll_on - forcibly enable just the PLL
+ * @dev_priv: i915 private structure
+ * @pipe: pipe PLL to enable
+ * @dpll: PLL configuration
+ *
+ * Enable the PLL for @pipe using the supplied @dpll config. To be used
+ * in cases where we need the PLL enabled even when @pipe is not going to
+ * be enabled.
+ */
+int vlv_force_pll_on(struct drm_i915_private *dev_priv, enum pipe pipe,
+ const struct dpll *dpll)
+{
+ struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+ struct intel_crtc_state *pipe_config;
+
+ pipe_config = intel_crtc_state_alloc(crtc);
+ if (!pipe_config)
+ return -ENOMEM;
+
+ pipe_config->cpu_transcoder = (enum transcoder)pipe;
+ pipe_config->pixel_multiplier = 1;
+ pipe_config->dpll = *dpll;
+
+ if (IS_CHERRYVIEW(dev_priv)) {
+ chv_compute_dpll(crtc, pipe_config);
+ chv_prepare_pll(crtc, pipe_config);
+ chv_enable_pll(crtc, pipe_config);
+ } else {
+ vlv_compute_dpll(crtc, pipe_config);
+ vlv_prepare_pll(crtc, pipe_config);
+ vlv_enable_pll(crtc, pipe_config);
+ }
+
+ kfree(pipe_config);
+
+ return 0;
+}
+
+void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+ u32 val;
+
+ /* Make sure the pipe isn't still relying on us */
+ assert_pipe_disabled(dev_priv, (enum transcoder)pipe);
+
+ val = DPLL_INTEGRATED_REF_CLK_VLV |
+ DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+ if (pipe != PIPE_A)
+ val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+ intel_de_write(dev_priv, DPLL(pipe), val);
+ intel_de_posting_read(dev_priv, DPLL(pipe));
+}
+
+void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+ enum dpio_channel port = vlv_pipe_to_channel(pipe);
+ u32 val;
+
+ /* Make sure the pipe isn't still relying on us */
+ assert_pipe_disabled(dev_priv, (enum transcoder)pipe);
+
+ val = DPLL_SSC_REF_CLK_CHV |
+ DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+ if (pipe != PIPE_A)
+ val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+ intel_de_write(dev_priv, DPLL(pipe), val);
+ intel_de_posting_read(dev_priv, DPLL(pipe));
+
+ vlv_dpio_get(dev_priv);
+
+ /* Disable 10bit clock to display controller */
+ val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
+ val &= ~DPIO_DCLKP_EN;
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val);
+
+ vlv_dpio_put(dev_priv);
+}
+
+void i9xx_disable_pll(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+
+ /* Don't disable pipe or pipe PLLs if needed */
+ if (IS_I830(dev_priv))
+ return;
+
+ /* Make sure the pipe isn't still relying on us */
+ assert_pipe_disabled(dev_priv, crtc_state->cpu_transcoder);
+
+ intel_de_write(dev_priv, DPLL(pipe), DPLL_VGA_MODE_DIS);
+ intel_de_posting_read(dev_priv, DPLL(pipe));
+}
+
+
+/**
+ * vlv_force_pll_off - forcibly disable just the PLL
+ * @dev_priv: i915 private structure
+ * @pipe: pipe PLL to disable
+ *
+ * Disable the PLL for @pipe. To be used in cases where we need
+ * the PLL enabled even when @pipe is not going to be enabled.
+ */
+void vlv_force_pll_off(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+ if (IS_CHERRYVIEW(dev_priv))
+ chv_disable_pll(dev_priv, pipe);
+ else
+ vlv_disable_pll(dev_priv, pipe);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-31 15:00:50 +0300