drm/tegra: sor: Move register definitions into a table

After commit 932f6529 ("drm/tegra: sor: Trace register accesses"),
the debugfs register dump implementation causes excessive stack usage
and can result in build warnings. To fix this, move the register
definitions into a table and iterate over the table while dumping the
registers to debugfs.
Signed-off-by: NThierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/sor.c

@@ -1105,12 +1105,132 @@ static int tegra_sor_show_crc(struct seq_file *s, void *data)
 	return err;
 }
 
+#define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name }
+
+static const struct debugfs_reg32 tegra_sor_regs[] = {
+	DEBUGFS_REG32(SOR_CTXSW),
+	DEBUGFS_REG32(SOR_SUPER_STATE0),
+	DEBUGFS_REG32(SOR_SUPER_STATE1),
+	DEBUGFS_REG32(SOR_STATE0),
+	DEBUGFS_REG32(SOR_STATE1),
+	DEBUGFS_REG32(SOR_HEAD_STATE0(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE0(1)),
+	DEBUGFS_REG32(SOR_HEAD_STATE1(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE1(1)),
+	DEBUGFS_REG32(SOR_HEAD_STATE2(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE2(1)),
+	DEBUGFS_REG32(SOR_HEAD_STATE3(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE3(1)),
+	DEBUGFS_REG32(SOR_HEAD_STATE4(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE4(1)),
+	DEBUGFS_REG32(SOR_HEAD_STATE5(0)),
+	DEBUGFS_REG32(SOR_HEAD_STATE5(1)),
+	DEBUGFS_REG32(SOR_CRC_CNTRL),
+	DEBUGFS_REG32(SOR_DP_DEBUG_MVID),
+	DEBUGFS_REG32(SOR_CLK_CNTRL),
+	DEBUGFS_REG32(SOR_CAP),
+	DEBUGFS_REG32(SOR_PWR),
+	DEBUGFS_REG32(SOR_TEST),
+	DEBUGFS_REG32(SOR_PLL0),
+	DEBUGFS_REG32(SOR_PLL1),
+	DEBUGFS_REG32(SOR_PLL2),
+	DEBUGFS_REG32(SOR_PLL3),
+	DEBUGFS_REG32(SOR_CSTM),
+	DEBUGFS_REG32(SOR_LVDS),
+	DEBUGFS_REG32(SOR_CRCA),
+	DEBUGFS_REG32(SOR_CRCB),
+	DEBUGFS_REG32(SOR_BLANK),
+	DEBUGFS_REG32(SOR_SEQ_CTL),
+	DEBUGFS_REG32(SOR_LANE_SEQ_CTL),
+	DEBUGFS_REG32(SOR_SEQ_INST(0)),
+	DEBUGFS_REG32(SOR_SEQ_INST(1)),
+	DEBUGFS_REG32(SOR_SEQ_INST(2)),
+	DEBUGFS_REG32(SOR_SEQ_INST(3)),
+	DEBUGFS_REG32(SOR_SEQ_INST(4)),
+	DEBUGFS_REG32(SOR_SEQ_INST(5)),
+	DEBUGFS_REG32(SOR_SEQ_INST(6)),
+	DEBUGFS_REG32(SOR_SEQ_INST(7)),
+	DEBUGFS_REG32(SOR_SEQ_INST(8)),
+	DEBUGFS_REG32(SOR_SEQ_INST(9)),
+	DEBUGFS_REG32(SOR_SEQ_INST(10)),
+	DEBUGFS_REG32(SOR_SEQ_INST(11)),
+	DEBUGFS_REG32(SOR_SEQ_INST(12)),
+	DEBUGFS_REG32(SOR_SEQ_INST(13)),
+	DEBUGFS_REG32(SOR_SEQ_INST(14)),
+	DEBUGFS_REG32(SOR_SEQ_INST(15)),
+	DEBUGFS_REG32(SOR_PWM_DIV),
+	DEBUGFS_REG32(SOR_PWM_CTL),
+	DEBUGFS_REG32(SOR_VCRC_A0),
+	DEBUGFS_REG32(SOR_VCRC_A1),
+	DEBUGFS_REG32(SOR_VCRC_B0),
+	DEBUGFS_REG32(SOR_VCRC_B1),
+	DEBUGFS_REG32(SOR_CCRC_A0),
+	DEBUGFS_REG32(SOR_CCRC_A1),
+	DEBUGFS_REG32(SOR_CCRC_B0),
+	DEBUGFS_REG32(SOR_CCRC_B1),
+	DEBUGFS_REG32(SOR_EDATA_A0),
+	DEBUGFS_REG32(SOR_EDATA_A1),
+	DEBUGFS_REG32(SOR_EDATA_B0),
+	DEBUGFS_REG32(SOR_EDATA_B1),
+	DEBUGFS_REG32(SOR_COUNT_A0),
+	DEBUGFS_REG32(SOR_COUNT_A1),
+	DEBUGFS_REG32(SOR_COUNT_B0),
+	DEBUGFS_REG32(SOR_COUNT_B1),
+	DEBUGFS_REG32(SOR_DEBUG_A0),
+	DEBUGFS_REG32(SOR_DEBUG_A1),
+	DEBUGFS_REG32(SOR_DEBUG_B0),
+	DEBUGFS_REG32(SOR_DEBUG_B1),
+	DEBUGFS_REG32(SOR_TRIG),
+	DEBUGFS_REG32(SOR_MSCHECK),
+	DEBUGFS_REG32(SOR_XBAR_CTRL),
+	DEBUGFS_REG32(SOR_XBAR_POL),
+	DEBUGFS_REG32(SOR_DP_LINKCTL0),
+	DEBUGFS_REG32(SOR_DP_LINKCTL1),
+	DEBUGFS_REG32(SOR_LANE_DRIVE_CURRENT0),
+	DEBUGFS_REG32(SOR_LANE_DRIVE_CURRENT1),
+	DEBUGFS_REG32(SOR_LANE4_DRIVE_CURRENT0),
+	DEBUGFS_REG32(SOR_LANE4_DRIVE_CURRENT1),
+	DEBUGFS_REG32(SOR_LANE_PREEMPHASIS0),
+	DEBUGFS_REG32(SOR_LANE_PREEMPHASIS1),
+	DEBUGFS_REG32(SOR_LANE4_PREEMPHASIS0),
+	DEBUGFS_REG32(SOR_LANE4_PREEMPHASIS1),
+	DEBUGFS_REG32(SOR_LANE_POSTCURSOR0),
+	DEBUGFS_REG32(SOR_LANE_POSTCURSOR1),
+	DEBUGFS_REG32(SOR_DP_CONFIG0),
+	DEBUGFS_REG32(SOR_DP_CONFIG1),
+	DEBUGFS_REG32(SOR_DP_MN0),
+	DEBUGFS_REG32(SOR_DP_MN1),
+	DEBUGFS_REG32(SOR_DP_PADCTL0),
+	DEBUGFS_REG32(SOR_DP_PADCTL1),
+	DEBUGFS_REG32(SOR_DP_DEBUG0),
+	DEBUGFS_REG32(SOR_DP_DEBUG1),
+	DEBUGFS_REG32(SOR_DP_SPARE0),
+	DEBUGFS_REG32(SOR_DP_SPARE1),
+	DEBUGFS_REG32(SOR_DP_AUDIO_CTRL),
+	DEBUGFS_REG32(SOR_DP_AUDIO_HBLANK_SYMBOLS),
+	DEBUGFS_REG32(SOR_DP_AUDIO_VBLANK_SYMBOLS),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_HEADER),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK0),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK1),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK2),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK3),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK4),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK5),
+	DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK6),
+	DEBUGFS_REG32(SOR_DP_TPG),
+	DEBUGFS_REG32(SOR_DP_TPG_CONFIG),
+	DEBUGFS_REG32(SOR_DP_LQ_CSTM0),
+	DEBUGFS_REG32(SOR_DP_LQ_CSTM1),
+	DEBUGFS_REG32(SOR_DP_LQ_CSTM2),
+};
+
 static int tegra_sor_show_regs(struct seq_file *s, void *data)
 {
 	struct drm_info_node *node = s->private;
 	struct tegra_sor *sor = node->info_ent->data;
 	struct drm_crtc *crtc = sor->output.encoder.crtc;
 	struct drm_device *drm = node->minor->dev;
+	unsigned int i;
 	int err = 0;
 
 	drm_modeset_lock_all(drm);
@@ -1120,126 +1240,12 @@ static int tegra_sor_show_regs(struct seq_file *s, void *data)
 		goto unlock;
 	}
 
-#define DUMP_REG(name)						\
-	seq_printf(s, "%-38s %#05x %08x\n", #name, name,	\
-		   tegra_sor_readl(sor, name))
-
-	DUMP_REG(SOR_CTXSW);
-	DUMP_REG(SOR_SUPER_STATE0);
-	DUMP_REG(SOR_SUPER_STATE1);
-	DUMP_REG(SOR_STATE0);
-	DUMP_REG(SOR_STATE1);
-	DUMP_REG(SOR_HEAD_STATE0(0));
-	DUMP_REG(SOR_HEAD_STATE0(1));
-	DUMP_REG(SOR_HEAD_STATE1(0));
-	DUMP_REG(SOR_HEAD_STATE1(1));
-	DUMP_REG(SOR_HEAD_STATE2(0));
-	DUMP_REG(SOR_HEAD_STATE2(1));
-	DUMP_REG(SOR_HEAD_STATE3(0));
-	DUMP_REG(SOR_HEAD_STATE3(1));
-	DUMP_REG(SOR_HEAD_STATE4(0));
-	DUMP_REG(SOR_HEAD_STATE4(1));
-	DUMP_REG(SOR_HEAD_STATE5(0));
-	DUMP_REG(SOR_HEAD_STATE5(1));
-	DUMP_REG(SOR_CRC_CNTRL);
-	DUMP_REG(SOR_DP_DEBUG_MVID);
-	DUMP_REG(SOR_CLK_CNTRL);
-	DUMP_REG(SOR_CAP);
-	DUMP_REG(SOR_PWR);
-	DUMP_REG(SOR_TEST);
-	DUMP_REG(SOR_PLL0);
-	DUMP_REG(SOR_PLL1);
-	DUMP_REG(SOR_PLL2);
-	DUMP_REG(SOR_PLL3);
-	DUMP_REG(SOR_CSTM);
-	DUMP_REG(SOR_LVDS);
-	DUMP_REG(SOR_CRCA);
-	DUMP_REG(SOR_CRCB);
-	DUMP_REG(SOR_BLANK);
-	DUMP_REG(SOR_SEQ_CTL);
-	DUMP_REG(SOR_LANE_SEQ_CTL);
-	DUMP_REG(SOR_SEQ_INST(0));
-	DUMP_REG(SOR_SEQ_INST(1));
-	DUMP_REG(SOR_SEQ_INST(2));
-	DUMP_REG(SOR_SEQ_INST(3));
-	DUMP_REG(SOR_SEQ_INST(4));
-	DUMP_REG(SOR_SEQ_INST(5));
-	DUMP_REG(SOR_SEQ_INST(6));
-	DUMP_REG(SOR_SEQ_INST(7));
-	DUMP_REG(SOR_SEQ_INST(8));
-	DUMP_REG(SOR_SEQ_INST(9));
-	DUMP_REG(SOR_SEQ_INST(10));
-	DUMP_REG(SOR_SEQ_INST(11));
-	DUMP_REG(SOR_SEQ_INST(12));
-	DUMP_REG(SOR_SEQ_INST(13));
-	DUMP_REG(SOR_SEQ_INST(14));
-	DUMP_REG(SOR_SEQ_INST(15));
-	DUMP_REG(SOR_PWM_DIV);
-	DUMP_REG(SOR_PWM_CTL);
-	DUMP_REG(SOR_VCRC_A0);
-	DUMP_REG(SOR_VCRC_A1);
-	DUMP_REG(SOR_VCRC_B0);
-	DUMP_REG(SOR_VCRC_B1);
-	DUMP_REG(SOR_CCRC_A0);
-	DUMP_REG(SOR_CCRC_A1);
-	DUMP_REG(SOR_CCRC_B0);
-	DUMP_REG(SOR_CCRC_B1);
-	DUMP_REG(SOR_EDATA_A0);
-	DUMP_REG(SOR_EDATA_A1);
-	DUMP_REG(SOR_EDATA_B0);
-	DUMP_REG(SOR_EDATA_B1);
-	DUMP_REG(SOR_COUNT_A0);
-	DUMP_REG(SOR_COUNT_A1);
-	DUMP_REG(SOR_COUNT_B0);
-	DUMP_REG(SOR_COUNT_B1);
-	DUMP_REG(SOR_DEBUG_A0);
-	DUMP_REG(SOR_DEBUG_A1);
-	DUMP_REG(SOR_DEBUG_B0);
-	DUMP_REG(SOR_DEBUG_B1);
-	DUMP_REG(SOR_TRIG);
-	DUMP_REG(SOR_MSCHECK);
-	DUMP_REG(SOR_XBAR_CTRL);
-	DUMP_REG(SOR_XBAR_POL);
-	DUMP_REG(SOR_DP_LINKCTL0);
-	DUMP_REG(SOR_DP_LINKCTL1);
-	DUMP_REG(SOR_LANE_DRIVE_CURRENT0);
-	DUMP_REG(SOR_LANE_DRIVE_CURRENT1);
-	DUMP_REG(SOR_LANE4_DRIVE_CURRENT0);
-	DUMP_REG(SOR_LANE4_DRIVE_CURRENT1);
-	DUMP_REG(SOR_LANE_PREEMPHASIS0);
-	DUMP_REG(SOR_LANE_PREEMPHASIS1);
-	DUMP_REG(SOR_LANE4_PREEMPHASIS0);
-	DUMP_REG(SOR_LANE4_PREEMPHASIS1);
-	DUMP_REG(SOR_LANE_POSTCURSOR0);
-	DUMP_REG(SOR_LANE_POSTCURSOR1);
-	DUMP_REG(SOR_DP_CONFIG0);
-	DUMP_REG(SOR_DP_CONFIG1);
-	DUMP_REG(SOR_DP_MN0);
-	DUMP_REG(SOR_DP_MN1);
-	DUMP_REG(SOR_DP_PADCTL0);
-	DUMP_REG(SOR_DP_PADCTL1);
-	DUMP_REG(SOR_DP_DEBUG0);
-	DUMP_REG(SOR_DP_DEBUG1);
-	DUMP_REG(SOR_DP_SPARE0);
-	DUMP_REG(SOR_DP_SPARE1);
-	DUMP_REG(SOR_DP_AUDIO_CTRL);
-	DUMP_REG(SOR_DP_AUDIO_HBLANK_SYMBOLS);
-	DUMP_REG(SOR_DP_AUDIO_VBLANK_SYMBOLS);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_HEADER);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK0);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK1);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK2);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK3);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK4);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK5);
-	DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK6);
-	DUMP_REG(SOR_DP_TPG);
-	DUMP_REG(SOR_DP_TPG_CONFIG);
-	DUMP_REG(SOR_DP_LQ_CSTM0);
-	DUMP_REG(SOR_DP_LQ_CSTM1);
-	DUMP_REG(SOR_DP_LQ_CSTM2);
-
-#undef DUMP_REG
+	for (i = 0; i < ARRAY_SIZE(tegra_sor_regs); i++) {
+		unsigned int offset = tegra_sor_regs[i].offset;
+
+		seq_printf(s, "%-38s %#05x %08x\n", tegra_sor_regs[i].name,
+			   offset, tegra_sor_readl(sor, offset));
+	}
 
 unlock:
 	drm_modeset_unlock_all(drm);