drm/i915: hw state readout for i9xx dplls

In addition to existing stuff we also need to track DPLL_MD on gen4
and vlv. This is prep work so that we can move the dpll enable
sequence out from the ->mode_set callback into the crtc enabling
functions.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index dfb10fe..e9c8b58 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -144,6 +144,7 @@ enum intel_dpll_id {
 
 struct intel_dpll_hw_state {
        uint32_t dpll;
+       uint32_t dpll_md;
        uint32_t fp0;
        uint32_t fp1;
 };

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f7d4c5e..4e451fa 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4272,14 +4272,17 @@ static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
        }
 
        I915_WRITE(FP0(pipe), fp);
+       crtc->config.dpll_hw_state.fp0 = fp;
 
        crtc->lowfreq_avail = false;
        if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
            reduced_clock && i915_powersave) {
                I915_WRITE(FP1(pipe), fp2);
+               crtc->config.dpll_hw_state.fp1 = fp2;
                crtc->lowfreq_avail = true;
        } else {
                I915_WRITE(FP1(pipe), fp);
+               crtc->config.dpll_hw_state.fp1 = fp;
        }
 }
 
@@ -4457,6 +4460,8 @@ static void vlv_update_pll(struct intel_crtc *crtc)
                dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
 
        dpll |= DPLL_VCO_ENABLE;
+       crtc->config.dpll_hw_state.dpll = dpll;
+
        I915_WRITE(DPLL(pipe), dpll);
        POSTING_READ(DPLL(pipe));
        udelay(150);
@@ -4466,6 +4471,8 @@ static void vlv_update_pll(struct intel_crtc *crtc)
 
        dpll_md = (crtc->config.pixel_multiplier - 1)
                << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+       crtc->config.dpll_hw_state.dpll_md = dpll_md;
+
        I915_WRITE(DPLL_MD(pipe), dpll_md);
        POSTING_READ(DPLL_MD(pipe));
 
@@ -4544,6 +4551,8 @@ static void i9xx_update_pll(struct intel_crtc *crtc,
                dpll |= PLL_REF_INPUT_DREFCLK;
 
        dpll |= DPLL_VCO_ENABLE;
+       crtc->config.dpll_hw_state.dpll = dpll;
+
        I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
        POSTING_READ(DPLL(pipe));
        udelay(150);
@@ -4564,6 +4573,8 @@ static void i9xx_update_pll(struct intel_crtc *crtc,
        if (INTEL_INFO(dev)->gen >= 4) {
                u32 dpll_md = (crtc->config.pixel_multiplier - 1)
                        << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+               crtc->config.dpll_hw_state.dpll_md = dpll_md;
+
                I915_WRITE(DPLL_MD(pipe), dpll_md);
        } else {
                /* The pixel multiplier can only be updated once the
@@ -4608,6 +4619,8 @@ static void i8xx_update_pll(struct intel_crtc *crtc,
                dpll |= PLL_REF_INPUT_DREFCLK;
 
        dpll |= DPLL_VCO_ENABLE;
+       crtc->config.dpll_hw_state.dpll = dpll;
+
        I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
        POSTING_READ(DPLL(pipe));
        udelay(150);
@@ -4964,6 +4977,7 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
                pipe_config->pixel_multiplier =
                        ((tmp & DPLL_MD_UDI_MULTIPLIER_MASK)
                         >> DPLL_MD_UDI_MULTIPLIER_SHIFT) + 1;
+               pipe_config->dpll_hw_state.dpll_md = tmp;
        } else if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) {
                tmp = I915_READ(DPLL(crtc->pipe));
                pipe_config->pixel_multiplier =
@@ -4975,6 +4989,11 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
                 * function. */
                pipe_config->pixel_multiplier = 1;
        }
+       pipe_config->dpll_hw_state.dpll = I915_READ(DPLL(crtc->pipe));
+       if (!IS_VALLEYVIEW(dev)) {
+               pipe_config->dpll_hw_state.fp0 = I915_READ(FP0(crtc->pipe));
+               pipe_config->dpll_hw_state.fp1 = I915_READ(FP1(crtc->pipe));
+       }
 
        return true;
 }
@@ -8126,6 +8145,7 @@ intel_pipe_config_compare(struct drm_device *dev,
 
        PIPE_CONF_CHECK_I(shared_dpll);
        PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
+       PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
        PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
        PIPE_CONF_CHECK_X(dpll_hw_state.fp1);