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[4/8] drm/i915/lvds: Use struct intel_pps_delays for LVDS power sequencing

Message ID 20241106215859.25446-5-ville.syrjala@linux.intel.com (mailing list archive)
State New
Headers show
Series drm/i915/pps: Some PPS cleanups | expand

Commit Message

Ville Syrjälä Nov. 6, 2024, 9:58 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reuse struct intel_pps_delays for the LVDS power
sequencing delays insteda of hand rolling it all.
Perhaps in the future we could reuse some of the
same PPS code for both LVDS and eDP (assuming we
can decouple the PPS code from intel_dp...).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 .../drm/i915/display/intel_display_types.h    | 10 ++--
 drivers/gpu/drm/i915/display/intel_lvds.c     | 49 ++++++++++---------
 2 files changed, 30 insertions(+), 29 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 4af40315b410..961c81681d6f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -303,11 +303,11 @@  struct intel_panel_bl_funcs {
 
 /* in 100us units */
 struct intel_pps_delays {
-	u16 power_up;      /* eDP: T1+T3 */
-	u16 backlight_on;  /* eDP: T8 */
-	u16 backlight_off; /* eDP: T9 */
-	u16 power_down;    /* eDP: T10 */
-	u16 power_cycle;   /* eDP: T11+T12 */
+	u16 power_up;      /* eDP: T1+T3,   LVDS: T1+T2 */
+	u16 backlight_on;  /* eDP: T8,      LVDS: T5 */
+	u16 backlight_off; /* eDP: T9,      LVDS: T6/TX */
+	u16 power_down;    /* eDP: T10,     LVDS: T3 */
+	u16 power_cycle;   /* eDP: T11+T12, LVDS: T7+T4 */
 };
 
 enum drrs_type {
diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
index 6d7637ad980a..6ffd55c17445 100644
--- a/drivers/gpu/drm/i915/display/intel_lvds.c
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -57,12 +57,7 @@ 
 
 /* Private structure for the integrated LVDS support */
 struct intel_lvds_pps {
-	/* 100us units */
-	int t1_t2;
-	int t3;
-	int t4;
-	int t5;
-	int tx;
+	struct intel_pps_delays delays;
 
 	int divider;
 
@@ -168,12 +163,12 @@  static void intel_lvds_pps_get_hw_state(struct drm_i915_private *dev_priv,
 
 	val = intel_de_read(dev_priv, PP_ON_DELAYS(dev_priv, 0));
 	pps->port = REG_FIELD_GET(PANEL_PORT_SELECT_MASK, val);
-	pps->t1_t2 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, val);
-	pps->t5 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, val);
+	pps->delays.power_up = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, val);
+	pps->delays.backlight_on = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, val);
 
 	val = intel_de_read(dev_priv, PP_OFF_DELAYS(dev_priv, 0));
-	pps->t3 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, val);
-	pps->tx = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, val);
+	pps->delays.power_down = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, val);
+	pps->delays.backlight_off = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, val);
 
 	val = intel_de_read(dev_priv, PP_DIVISOR(dev_priv, 0));
 	pps->divider = REG_FIELD_GET(PP_REFERENCE_DIVIDER_MASK, val);
@@ -186,25 +181,30 @@  static void intel_lvds_pps_get_hw_state(struct drm_i915_private *dev_priv,
 	if (val)
 		val--;
 	/* Convert from 100ms to 100us units */
-	pps->t4 = val * 1000;
+	pps->delays.power_cycle = val * 1000;
 
 	if (DISPLAY_VER(dev_priv) < 5 &&
-	    pps->t1_t2 == 0 && pps->t5 == 0 && pps->t3 == 0 && pps->tx == 0) {
+	    pps->delays.power_up == 0 &&
+	    pps->delays.backlight_on == 0 &&
+	    pps->delays.power_down == 0 &&
+	    pps->delays.backlight_off == 0) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "Panel power timings uninitialized, "
 			    "setting defaults\n");
 		/* Set T2 to 40ms and T5 to 200ms in 100 usec units */
-		pps->t1_t2 = 40 * 10;
-		pps->t5 = 200 * 10;
+		pps->delays.power_up = 40 * 10;
+		pps->delays.backlight_on = 200 * 10;
 		/* Set T3 to 35ms and Tx to 200ms in 100 usec units */
-		pps->t3 = 35 * 10;
-		pps->tx = 200 * 10;
+		pps->delays.power_down = 35 * 10;
+		pps->delays.backlight_off = 200 * 10;
 	}
 
-	drm_dbg(&dev_priv->drm, "LVDS PPS:t1+t2 %d t3 %d t4 %d t5 %d tx %d "
+	drm_dbg(&dev_priv->drm, "LVDS PPS:power_up %d power_down %d power_cycle %d backlight_on %d backlight_off %d "
 		"divider %d port %d powerdown_on_reset %d\n",
-		pps->t1_t2, pps->t3, pps->t4, pps->t5, pps->tx,
-		pps->divider, pps->port, pps->powerdown_on_reset);
+		pps->delays.power_up, pps->delays.power_down,
+		pps->delays.power_cycle, pps->delays.backlight_on,
+		pps->delays.backlight_off, pps->divider,
+		pps->port, pps->powerdown_on_reset);
 }
 
 static void intel_lvds_pps_init_hw(struct drm_i915_private *dev_priv,
@@ -221,16 +221,17 @@  static void intel_lvds_pps_init_hw(struct drm_i915_private *dev_priv,
 
 	intel_de_write(dev_priv, PP_ON_DELAYS(dev_priv, 0),
 		       REG_FIELD_PREP(PANEL_PORT_SELECT_MASK, pps->port) |
-		       REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, pps->t1_t2) |
-		       REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, pps->t5));
+		       REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, pps->delays.power_up) |
+		       REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, pps->delays.backlight_on));
 
 	intel_de_write(dev_priv, PP_OFF_DELAYS(dev_priv, 0),
-		       REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, pps->t3) |
-		       REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, pps->tx));
+		       REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, pps->delays.power_down) |
+		       REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, pps->delays.backlight_off));
 
 	intel_de_write(dev_priv, PP_DIVISOR(dev_priv, 0),
 		       REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, pps->divider) |
-		       REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(pps->t4, 1000) + 1));
+		       REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK,
+				      DIV_ROUND_UP(pps->delays.power_cycle, 1000) + 1));
 }
 
 static void intel_pre_enable_lvds(struct intel_atomic_state *state,