drm/i915: remove g4x lowfreq_avail and has_pipe_cxsr

They're unused and unsupported. Leave the reduced_clock pointers in
place still, should they prove useful later on.

v2: go from nuking DDI lowfreq_avail to nuking it entirely (Ville)

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171017140234.20677-1-jani.nikula@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -785,7 +785,6 @@ struct intel_csr {
 	func(has_logical_ring_contexts); \
 	func(has_logical_ring_preemption); \
 	func(has_overlay); \
-	func(has_pipe_cxsr); \
 	func(has_pooled_eu); \
 	func(has_psr); \
 	func(has_rc6); \
@@ -3177,7 +3176,6 @@ intel_info(const struct drm_i915_private *dev_priv)
 #define I915_HAS_HOTPLUG(dev_priv)	((dev_priv)->info.has_hotplug)
 
 #define HAS_FW_BLC(dev_priv) 	(INTEL_GEN(dev_priv) > 2)
-#define HAS_PIPE_CXSR(dev_priv) ((dev_priv)->info.has_pipe_cxsr)
 #define HAS_FBC(dev_priv)	((dev_priv)->info.has_fbc)
 #define HAS_CUR_FBC(dev_priv)	(!HAS_GMCH_DISPLAY(dev_priv) && INTEL_INFO(dev_priv)->gen >= 7)
 

drivers/gpu/drm/i915/i915_pci.c

@@ -193,7 +193,6 @@ static const struct intel_device_info intel_i965gm_info __initconst = {
 static const struct intel_device_info intel_g45_info __initconst = {
 	GEN4_FEATURES,
 	.platform = INTEL_G45,
-	.has_pipe_cxsr = 1,
 	.ring_mask = RENDER_RING | BSD_RING,
 };
 
@@ -201,7 +200,6 @@ static const struct intel_device_info intel_gm45_info __initconst = {
 	GEN4_FEATURES,
 	.platform = INTEL_GM45,
 	.is_mobile = 1, .has_fbc = 1,
-	.has_pipe_cxsr = 1,
 	.supports_tv = 1,
 	.ring_mask = RENDER_RING | BSD_RING,
 };

drivers/gpu/drm/i915/intel_display.c

@@ -6438,11 +6438,9 @@ static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
 
 	crtc_state->dpll_hw_state.fp0 = fp;
 
-	crtc->lowfreq_avail = false;
 	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
 	    reduced_clock) {
 		crtc_state->dpll_hw_state.fp1 = fp2;
-		crtc->lowfreq_avail = true;
 	} else {
 		crtc_state->dpll_hw_state.fp1 = fp;
 	}
@@ -7137,15 +7135,6 @@ static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)
 		}
 	}
 
-	if (HAS_PIPE_CXSR(dev_priv)) {
-		if (intel_crtc->lowfreq_avail) {
-			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
-			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
-		} else {
-			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
-		}
-	}
-
 	if (intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
 		if (INTEL_GEN(dev_priv) < 4 ||
 		    intel_crtc_has_type(intel_crtc->config, INTEL_OUTPUT_SDVO))
@@ -8281,8 +8270,6 @@ static int ironlake_crtc_compute_clock(struct intel_crtc *crtc,
 	memset(&crtc_state->dpll_hw_state, 0,
 	       sizeof(crtc_state->dpll_hw_state));
 
-	crtc->lowfreq_avail = false;
-
 	/* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
 	if (!crtc_state->has_pch_encoder)
 		return 0;
@@ -8941,8 +8928,6 @@ static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
 		}
 	}
 
-	crtc->lowfreq_avail = false;
-
 	return 0;
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -803,7 +803,6 @@ struct intel_crtc {
 	 * some outputs connected to this crtc.
 	 */
 	bool active;
-	bool lowfreq_avail;
 	u8 plane_ids_mask;
 	unsigned long long enabled_power_domains;
 	struct intel_overlay *overlay;