Merge tag 'du-next-20190328' of git://linuxtv.org/pinchartl/media into drm-next

R-Car DU miscellaneous changes for v5.2

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190328042035.GA4846@pendragon.ideasonboard.com

5 files changed, 94 insertions, 42 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 834432cafda8..2da46e3dc4ae 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -32,21 +32,21 @@
 
 static u32 rcar_du_crtc_read(struct rcar_du_crtc *rcrtc, u32 reg)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	return rcar_du_read(rcdu, rcrtc->mmio_offset + reg);
 }
 
 static void rcar_du_crtc_write(struct rcar_du_crtc *rcrtc, u32 reg, u32 data)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcar_du_write(rcdu, rcrtc->mmio_offset + reg, data);
 }
 
 static void rcar_du_crtc_clr(struct rcar_du_crtc *rcrtc, u32 reg, u32 clr)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcar_du_write(rcdu, rcrtc->mmio_offset + reg,
 		      rcar_du_read(rcdu, rcrtc->mmio_offset + reg) & ~clr);
@@ -54,7 +54,7 @@ static void rcar_du_crtc_clr(struct rcar_du_crtc *rcrtc, u32 reg, u32 clr)
 
 static void rcar_du_crtc_set(struct rcar_du_crtc *rcrtc, u32 reg, u32 set)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcar_du_write(rcdu, rcrtc->mmio_offset + reg,
 		      rcar_du_read(rcdu, rcrtc->mmio_offset + reg) | set);
@@ -62,7 +62,7 @@ static void rcar_du_crtc_set(struct rcar_du_crtc *rcrtc, u32 reg, u32 set)
 
 void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcrtc->dsysr = (rcrtc->dsysr & ~clr) | set;
 	rcar_du_write(rcdu, rcrtc->mmio_offset + DSYSR, rcrtc->dsysr);
@@ -157,10 +157,9 @@ static void rcar_du_dpll_divider(struct rcar_du_crtc *rcrtc,
 	}
 
 done:
-	dev_dbg(rcrtc->group->dev->dev,
+	dev_dbg(rcrtc->dev->dev,
 		"output:%u, fdpll:%u, n:%u, m:%u, diff:%lu\n",
-		 dpll->output, dpll->fdpll, dpll->n, dpll->m,
-		 best_diff);
+		 dpll->output, dpll->fdpll, dpll->n, dpll->m, best_diff);
 }
 
 struct du_clk_params {
@@ -212,7 +211,7 @@ static const struct soc_device_attribute rcar_du_r8a7795_es1[] = {
 static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 {
 	const struct drm_display_mode *mode = &rcrtc->crtc.state->adjusted_mode;
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	unsigned long mode_clock = mode->clock * 1000;
 	u32 dsmr;
 	u32 escr;
@@ -277,7 +276,7 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 			rcar_du_escr_divider(rcrtc->extclock, mode_clock,
 					     ESCR_DCLKSEL_DCLKIN, &params);
 
-		dev_dbg(rcrtc->group->dev->dev,	"mode clock %lu %s rate %lu\n",
+		dev_dbg(rcrtc->dev->dev, "mode clock %lu %s rate %lu\n",
 			mode_clock, params.clk == rcrtc->clock ? "cpg" : "ext",
 			params.rate);
 
@@ -285,7 +284,7 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 		escr = params.escr;
 	}
 
-	dev_dbg(rcrtc->group->dev->dev, "%s: ESCR 0x%08x\n", __func__, escr);
+	dev_dbg(rcrtc->dev->dev, "%s: ESCR 0x%08x\n", __func__, escr);
 
 	rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? ESCR13 : ESCR02, escr);
 	rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? OTAR13 : OTAR02, 0);
@@ -333,7 +332,7 @@ plane_format(struct rcar_du_plane *plane)
 static void rcar_du_crtc_update_planes(struct rcar_du_crtc *rcrtc)
 {
 	struct rcar_du_plane *planes[RCAR_DU_NUM_HW_PLANES];
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	unsigned int num_planes = 0;
 	unsigned int dptsr_planes;
 	unsigned int hwplanes = 0;
@@ -463,7 +462,7 @@ static bool rcar_du_crtc_page_flip_pending(struct rcar_du_crtc *rcrtc)
 
 static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	if (wait_event_timeout(rcrtc->flip_wait,
 			       !rcar_du_crtc_page_flip_pending(rcrtc),
@@ -493,7 +492,7 @@ static void rcar_du_crtc_setup(struct rcar_du_crtc *rcrtc)
 	rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? DS2PR : DS1PR, 0);
 
 	/* Enable the VSP compositor. */
-	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
+	if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_enable(rcrtc);
 
 	/* Turn vertical blanking interrupt reporting on. */
@@ -564,7 +563,7 @@ static void rcar_du_crtc_start(struct rcar_du_crtc *rcrtc)
 
 static void rcar_du_crtc_disable_planes(struct rcar_du_crtc *rcrtc)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	struct drm_crtc *crtc = &rcrtc->crtc;
 	u32 status;
 
@@ -617,7 +616,7 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
 	drm_crtc_vblank_off(crtc);
 
 	/* Disable the VSP compositor. */
-	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
+	if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_disable(rcrtc);
 
 	/*
@@ -627,7 +626,7 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
 	 * TODO: Find another way to stop the display for DUs that don't support
 	 * TVM sync.
 	 */
-	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_TVM_SYNC))
+	if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_TVM_SYNC))
 		rcar_du_crtc_dsysr_clr_set(rcrtc, DSYSR_TVM_MASK,
 					   DSYSR_TVM_SWITCH);
 
@@ -666,7 +665,7 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 	struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcar_du_crtc_get(rcrtc);
 
@@ -694,7 +693,7 @@ static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 	struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(old_state);
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 
 	rcar_du_crtc_stop(rcrtc);
 	rcar_du_crtc_put(rcrtc);
@@ -740,7 +739,7 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
 	 */
 	rcar_du_crtc_get(rcrtc);
 
-	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
+	if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_atomic_begin(rcrtc);
 }
 
@@ -762,15 +761,16 @@ static void rcar_du_crtc_atomic_flush(struct drm_crtc *crtc,
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 	}
 
-	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
+	if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_atomic_flush(rcrtc);
 }
 
-enum drm_mode_status rcar_du_crtc_mode_valid(struct drm_crtc *crtc,
-				   const struct drm_display_mode *mode)
+static enum drm_mode_status
+rcar_du_crtc_mode_valid(struct drm_crtc *crtc,
+			const struct drm_display_mode *mode)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
 	unsigned int vbp;
 
@@ -802,7 +802,7 @@ static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 
 static void rcar_du_crtc_crc_init(struct rcar_du_crtc *rcrtc)
 {
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	const char **sources;
 	unsigned int count;
 	int i = -1;
@@ -986,8 +986,8 @@ static int rcar_du_crtc_verify_crc_source(struct drm_crtc *crtc,
 	return 0;
 }
 
-const char *const *rcar_du_crtc_get_crc_sources(struct drm_crtc *crtc,
-						size_t *count)
+static const char *const *
+rcar_du_crtc_get_crc_sources(struct drm_crtc *crtc, size_t *count)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 
@@ -1084,7 +1084,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
 static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
 {
 	struct rcar_du_crtc *rcrtc = arg;
-	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	struct rcar_du_device *rcdu = rcrtc->dev;
 	irqreturn_t ret = IRQ_NONE;
 	u32 status;
 
@@ -1176,6 +1176,7 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
 	init_waitqueue_head(&rcrtc->vblank_wait);
 	spin_lock_init(&rcrtc->vblank_lock);
 
+	rcrtc->dev = rcdu;
 	rcrtc->group = rgrp;
 	rcrtc->mmio_offset = mmio_offsets[hwindex];
 	rcrtc->index = hwindex;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 92f7d5f3ff80..3b7fc668996f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -25,6 +25,7 @@ struct rcar_du_vsp;
 /**
  * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
  * @crtc: base DRM CRTC
+ * @dev: the DU device
  * @clock: the CRTC functional clock
  * @extclock: external pixel dot clock (optional)
  * @mmio_offset: offset of the CRTC registers in the DU MMIO block
@@ -45,6 +46,7 @@ struct rcar_du_vsp;
 struct rcar_du_crtc {
 	struct drm_crtc crtc;
 
+	struct rcar_du_device *dev;
 	struct clk *clock;
 	struct clk *extclock;
 	unsigned int mmio_offset;
@@ -102,8 +104,6 @@ enum rcar_du_output {
 
 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
 			unsigned int hwindex);
-void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
-void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
 
 void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index 8ee4e762f4e5..6c91753af7bc 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -28,13 +28,33 @@ static const struct drm_encoder_funcs encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
+static unsigned int rcar_du_encoder_count_ports(struct device_node *node)
+{
+	struct device_node *ports;
+	struct device_node *port;
+	unsigned int num_ports = 0;
+
+	ports = of_get_child_by_name(node, "ports");
+	if (!ports)
+		ports = of_node_get(node);
+
+	for_each_child_of_node(ports, port) {
+		if (of_node_name_eq(port, "port"))
+			num_ports++;
+	}
+
+	of_node_put(ports);
+
+	return num_ports;
+}
+
 int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 			 enum rcar_du_output output,
 			 struct device_node *enc_node)
 {
 	struct rcar_du_encoder *renc;
 	struct drm_encoder *encoder;
-	struct drm_bridge *bridge = NULL;
+	struct drm_bridge *bridge;
 	int ret;
 
 	renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
@@ -48,11 +68,33 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
 		enc_node, output);
 
-	/* Locate the DRM bridge from the encoder DT node. */
-	bridge = of_drm_find_bridge(enc_node);
-	if (!bridge) {
-		ret = -EPROBE_DEFER;
-		goto done;
+	/*
+	 * Locate the DRM bridge from the DT node. For the DPAD outputs, if the
+	 * DT node has a single port, assume that it describes a panel and
+	 * create a panel bridge.
+	 */
+	if ((output == RCAR_DU_OUTPUT_DPAD0 ||
+	     output == RCAR_DU_OUTPUT_DPAD1) &&
+	    rcar_du_encoder_count_ports(enc_node) == 1) {
+		struct drm_panel *panel = of_drm_find_panel(enc_node);
+
+		if (IS_ERR(panel)) {
+			ret = PTR_ERR(panel);
+			goto done;
+		}
+
+		bridge = devm_drm_panel_bridge_add(rcdu->dev, panel,
+						   DRM_MODE_CONNECTOR_DPI);
+		if (IS_ERR(bridge)) {
+			ret = PTR_ERR(bridge);
+			goto done;
+		}
+	} else {
+		bridge = of_drm_find_bridge(enc_node);
+		if (!bridge) {
+			ret = -EPROBE_DEFER;
+			goto done;
+		}
 	}
 
 	ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index 4c8bed34838c..5e4faf258c31 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -47,7 +47,7 @@ static void rcar_du_vsp_complete(void *private, unsigned int status, u32 crc)
 void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 {
 	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
-	struct rcar_du_device *rcdu = crtc->group->dev;
+	struct rcar_du_device *rcdu = crtc->dev;
 	struct vsp1_du_lif_config cfg = {
 		.width = mode->hdisplay,
 		.height = mode->vdisplay,
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index 7ef97b2a6eda..620b51aab291 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -283,7 +283,7 @@ static void rcar_lvds_d3_e3_pll_calc(struct rcar_lvds *lvds, struct clk *clk,
 				 * divider.
 				 */
 				fout = fvco / (1 << e) / div7;
-				div = DIV_ROUND_CLOSEST(fout, target);
+				div = max(1UL, DIV_ROUND_CLOSEST(fout, target));
 				diff = abs(fout / div - target);
 
 				if (diff < pll->diff) {
@@ -485,9 +485,13 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)
 	}
 
 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) {
-		/* Turn on the LVDS PHY. */
+		/*
+		 * Turn on the LVDS PHY. On D3, the LVEN and LVRES bit must be
+		 * set at the same time, so don't write the register yet.
+		 */
 		lvdcr0 |= LVDCR0_LVEN;
-		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+		if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_PWD))
+			rcar_lvds_write(lvds, LVDCR0, lvdcr0);
 	}
 
 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) {
@@ -531,11 +535,16 @@ static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge,
 				 const struct drm_display_mode *mode,
 				 struct drm_display_mode *adjusted_mode)
 {
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+	int min_freq;
+
 	/*
 	 * The internal LVDS encoder has a restricted clock frequency operating
-	 * range (31MHz to 148.5MHz). Clamp the clock accordingly.
+	 * range, from 5MHz to 148.5MHz on D3 and E3, and from 31MHz to
+	 * 148.5MHz on all other platforms. Clamp the clock accordingly.
 	 */
-	adjusted_mode->clock = clamp(adjusted_mode->clock, 31000, 148500);
+	min_freq = lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL ? 5000 : 31000;
+	adjusted_mode->clock = clamp(adjusted_mode->clock, min_freq, 148500);
 
 	return true;
 }