drm/i915/quirks: abstract checking for display quirks

Add intel_has_quirk() for checking if a display quirk is present. Avoid
accessing i915->quirks all over the place.

v2: Rebase
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/74f954ca81a8068033141a15686dffd01ad9b0f9.1661779055.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_backlight.c

@@ -18,6 +18,7 @@
 #include "intel_panel.h"
 #include "intel_pci_config.h"
 #include "intel_pps.h"
+#include "intel_quirks.h"
 
 /**
  * scale - scale values from one range to another
@@ -88,7 +89,7 @@ u32 intel_backlight_invert_pwm_level(struct intel_connector *connector, u32 val)
 		return val;
 
 	if (dev_priv->params.invert_brightness > 0 ||
-	    dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
+	    intel_has_quirk(dev_priv, QUIRK_INVERT_BRIGHTNESS)) {
 		return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min;
 	}
 
@@ -128,7 +129,7 @@ u32 intel_backlight_level_from_pwm(struct intel_connector *connector, u32 val)
 			 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0);
 
 	if (dev_priv->params.invert_brightness > 0 ||
-	    (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS))
+	    (dev_priv->params.invert_brightness == 0 && intel_has_quirk(dev_priv, QUIRK_INVERT_BRIGHTNESS)))
 		val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min);
 
 	return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max,
@@ -1605,7 +1606,7 @@ int intel_backlight_setup(struct intel_connector *connector, enum pipe pipe)
 	int ret;
 
 	if (!connector->panel.vbt.backlight.present) {
-		if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
+		if (intel_has_quirk(dev_priv, QUIRK_BACKLIGHT_PRESENT)) {
 			drm_dbg_kms(&dev_priv->drm,
 				    "no backlight present per VBT, but present per quirk\n");
 		} else {
@@ -1777,7 +1778,7 @@ void intel_backlight_init_funcs(struct intel_panel *panel)
 		if (intel_dp_aux_init_backlight_funcs(connector) == 0)
 			return;
 
-		if (!(dev_priv->quirks & QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK))
+		if (!intel_has_quirk(dev_priv, QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK))
 			connector->panel.backlight.power = intel_pps_backlight_power;
 	}
 

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -57,6 +57,7 @@
 #include "intel_lspcon.h"
 #include "intel_pps.h"
 #include "intel_psr.h"
+#include "intel_quirks.h"
 #include "intel_snps_phy.h"
 #include "intel_sprite.h"
 #include "intel_tc.h"
@@ -631,7 +632,7 @@ void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state
 
 	intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder), ctl);
 
-	if (dev_priv->quirks & QUIRK_INCREASE_DDI_DISABLED_TIME &&
+	if (intel_has_quirk(dev_priv, QUIRK_INCREASE_DDI_DISABLED_TIME) &&
 	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "Quirk Increase DDI disabled time\n");

drivers/gpu/drm/i915/display/intel_panel.c

@@ -37,13 +37,14 @@
 #include "intel_display_types.h"
 #include "intel_drrs.h"
 #include "intel_panel.h"
+#include "intel_quirks.h"
 
 bool intel_panel_use_ssc(struct drm_i915_private *i915)
 {
 	if (i915->params.panel_use_ssc >= 0)
 		return i915->params.panel_use_ssc != 0;
-	return i915->display.vbt.lvds_use_ssc
-		&& !(i915->quirks & QUIRK_LVDS_SSC_DISABLE);
+	return i915->display.vbt.lvds_use_ssc &&
+		!intel_has_quirk(i915, QUIRK_LVDS_SSC_DISABLE);
 }
 
 const struct drm_display_mode *

drivers/gpu/drm/i915/display/intel_pps.c

@@ -12,6 +12,7 @@
 #include "intel_dpll.h"
 #include "intel_lvds.h"
 #include "intel_pps.h"
+#include "intel_quirks.h"
 
 static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
 				      enum pipe pipe);
@@ -1202,7 +1203,7 @@ static void pps_init_delays_vbt(struct intel_dp *intel_dp,
 	 * just fails to power back on. Increasing the delay to 800ms
 	 * seems sufficient to avoid this problem.
 	 */
-	if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
+	if (intel_has_quirk(dev_priv, QUIRK_INCREASE_T12_DELAY)) {
 		vbt->t11_t12 = max_t(u16, vbt->t11_t12, 1300 * 10);
 		drm_dbg_kms(&dev_priv->drm,
 			    "Increasing T12 panel delay as per the quirk to %d\n",

drivers/gpu/drm/i915/display/intel_quirks.c

@@ -216,3 +216,8 @@ void intel_init_quirks(struct drm_i915_private *i915)
 			intel_dmi_quirks[i].hook(i915);
 	}
 }
+
+bool intel_has_quirk(struct drm_i915_private *i915, unsigned long quirk)
+{
+	return i915->quirks & quirk;
+}

drivers/gpu/drm/i915/display/intel_quirks.h

@@ -6,8 +6,11 @@
 #ifndef __INTEL_QUIRKS_H__
 #define __INTEL_QUIRKS_H__
 
+#include <linux/types.h>
+
 struct drm_i915_private;
 
-void intel_init_quirks(struct drm_i915_private *dev_priv);
+void intel_init_quirks(struct drm_i915_private *i915);
+bool intel_has_quirk(struct drm_i915_private *i915, unsigned long quirk);
 
 #endif /* __INTEL_QUIRKS_H__ */