drm/vc4: Use drm_print_regset32() for our debug register dumping.

This removes a bunch of duplicated boilerplate for the debugfs vs
runtime printk debug dumping.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220210343.28157-2-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

1 files changed, 30 insertions, 38 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 64c964b7c577..6e564783ba94 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -35,6 +35,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic_uapi.h>
+#include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 #include <linux/clk.h>
 #include <drm/drm_fb_cma_helper.h>
@@ -67,43 +68,29 @@ to_vc4_crtc_state(struct drm_crtc_state *crtc_state)
 #define CRTC_WRITE(offset, val) writel(val, vc4_crtc->regs + (offset))
 #define CRTC_READ(offset) readl(vc4_crtc->regs + (offset))
 
-#define CRTC_REG(reg) { reg, #reg }
-static const struct {
-	u32 reg;
-	const char *name;
-} crtc_regs[] = {
-	CRTC_REG(PV_CONTROL),
-	CRTC_REG(PV_V_CONTROL),
-	CRTC_REG(PV_VSYNCD_EVEN),
-	CRTC_REG(PV_HORZA),
-	CRTC_REG(PV_HORZB),
-	CRTC_REG(PV_VERTA),
-	CRTC_REG(PV_VERTB),
-	CRTC_REG(PV_VERTA_EVEN),
-	CRTC_REG(PV_VERTB_EVEN),
-	CRTC_REG(PV_INTEN),
-	CRTC_REG(PV_INTSTAT),
-	CRTC_REG(PV_STAT),
-	CRTC_REG(PV_HACT_ACT),
+static const struct debugfs_reg32 crtc_regs[] = {
+	VC4_REG32(PV_CONTROL),
+	VC4_REG32(PV_V_CONTROL),
+	VC4_REG32(PV_VSYNCD_EVEN),
+	VC4_REG32(PV_HORZA),
+	VC4_REG32(PV_HORZB),
+	VC4_REG32(PV_VERTA),
+	VC4_REG32(PV_VERTB),
+	VC4_REG32(PV_VERTA_EVEN),
+	VC4_REG32(PV_VERTB_EVEN),
+	VC4_REG32(PV_INTEN),
+	VC4_REG32(PV_INTSTAT),
+	VC4_REG32(PV_STAT),
+	VC4_REG32(PV_HACT_ACT),
 };
 
-static void vc4_crtc_dump_regs(struct vc4_crtc *vc4_crtc)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) {
-		DRM_INFO("0x%04x (%s): 0x%08x\n",
-			 crtc_regs[i].reg, crtc_regs[i].name,
-			 CRTC_READ(crtc_regs[i].reg));
-	}
-}
-
 #ifdef CONFIG_DEBUG_FS
 int vc4_crtc_debugfs_regs(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
 	int crtc_index = (uintptr_t)node->info_ent->data;
+	struct drm_printer p = drm_seq_file_printer(m);
 	struct drm_crtc *crtc;
 	struct vc4_crtc *vc4_crtc;
 	int i;
@@ -118,11 +105,7 @@ int vc4_crtc_debugfs_regs(struct seq_file *m, void *unused)
 		return 0;
 	vc4_crtc = to_vc4_crtc(crtc);
 
-	for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) {
-		seq_printf(m, "%s (0x%04x): 0x%08x\n",
-			   crtc_regs[i].name, crtc_regs[i].reg,
-			   CRTC_READ(crtc_regs[i].reg));
-	}
+	drm_print_regset32(&p, &vc4_crtc->regset);
 
 	return 0;
 }
@@ -434,8 +417,10 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	bool debug_dump_regs = false;
 
 	if (debug_dump_regs) {
-		DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc));
-		vc4_crtc_dump_regs(vc4_crtc);
+		struct drm_printer p = drm_info_printer(&vc4_crtc->pdev->dev);
+		dev_info(&vc4_crtc->pdev->dev, "CRTC %d regs before:\n",
+			 drm_crtc_index(crtc));
+		drm_print_regset32(&p, &vc4_crtc->regset);
 	}
 
 	if (vc4_crtc->channel == 2) {
@@ -476,8 +461,10 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	vc4_crtc_lut_load(crtc);
 
 	if (debug_dump_regs) {
-		DRM_INFO("CRTC %d regs after:\n", drm_crtc_index(crtc));
-		vc4_crtc_dump_regs(vc4_crtc);
+		struct drm_printer p = drm_info_printer(&vc4_crtc->pdev->dev);
+		dev_info(&vc4_crtc->pdev->dev, "CRTC %d regs after:\n",
+			 drm_crtc_index(crtc));
+		drm_print_regset32(&p, &vc4_crtc->regset);
 	}
 }
 
@@ -1177,11 +1164,16 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 	if (!match)
 		return -ENODEV;
 	vc4_crtc->data = match->data;
+	vc4_crtc->pdev = pdev;
 
 	vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
 	if (IS_ERR(vc4_crtc->regs))
 		return PTR_ERR(vc4_crtc->regs);
 
+	vc4_crtc->regset.base = vc4_crtc->regs;
+	vc4_crtc->regset.regs = crtc_regs;
+	vc4_crtc->regset.nregs = ARRAY_SIZE(crtc_regs);
+
 	/* For now, we create just the primary and the legacy cursor
 	 * planes.  We should be able to stack more planes on easily,
 	 * but to do that we would need to compute the bandwidth