drm/ast: Move Gen2+ and Gen1 POST code to separate source files

Move POST code for Gen2+ and Gen1 to separate source files and
hide it in ast_2100_post() ans ast_2000_post(). With P2A
configuration, the POST logic for these chip generations has
been mingled in ast_init_dram_reg(). Hence, handle all generations
in a single change. The split simplifies both cases. Also move
the DRAM init tables for each Gen into the respective source
file. No changes to the overall logic.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250706162816.211552-6-tzimmermann@suse.de

1 files changed, 7 insertions, 236 deletions

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index a08264210d77..8e575e713f19 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -31,7 +31,6 @@
 
 #include <drm/drm_print.h>
 
-#include "ast_dram_tables.h"
 #include "ast_drv.h"
 #include "ast_post.h"
 
@@ -111,233 +110,6 @@ void ast_moutdwm(struct ast_device *ast, u32 r, u32 v)
 	__ast_moutdwm(ast->regs, r, v);
 }
 
-/*
- * AST2100/2150 DLL CBR Setting
- */
-#define CBR_SIZE_AST2150	     ((16 << 10) - 1)
-#define CBR_PASSNUM_AST2150          5
-#define CBR_THRESHOLD_AST2150        10
-#define CBR_THRESHOLD2_AST2150       10
-#define TIMEOUT_AST2150              5000000
-
-#define CBR_PATNUM_AST2150           8
-
-static const u32 pattern_AST2150[14] = {
-	0xFF00FF00,
-	0xCC33CC33,
-	0xAA55AA55,
-	0xFFFE0001,
-	0x683501FE,
-	0x0F1929B0,
-	0x2D0B4346,
-	0x60767F02,
-	0x6FBE36A6,
-	0x3A253035,
-	0x3019686D,
-	0x41C6167E,
-	0x620152BF,
-	0x20F050E0
-};
-
-static u32 mmctestburst2_ast2150(struct ast_device *ast, u32 datagen)
-{
-	u32 data, timeout;
-
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000001 | (datagen << 3));
-	timeout = 0;
-	do {
-		data = ast_mindwm(ast, 0x1e6e0070) & 0x40;
-		if (++timeout > TIMEOUT_AST2150) {
-			ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-			return 0xffffffff;
-		}
-	} while (!data);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000003 | (datagen << 3));
-	timeout = 0;
-	do {
-		data = ast_mindwm(ast, 0x1e6e0070) & 0x40;
-		if (++timeout > TIMEOUT_AST2150) {
-			ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-			return 0xffffffff;
-		}
-	} while (!data);
-	data = (ast_mindwm(ast, 0x1e6e0070) & 0x80) >> 7;
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	return data;
-}
-
-#if 0 /* unused in DDX driver - here for completeness */
-static u32 mmctestsingle2_ast2150(struct ast_device *ast, u32 datagen)
-{
-	u32 data, timeout;
-
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000005 | (datagen << 3));
-	timeout = 0;
-	do {
-		data = ast_mindwm(ast, 0x1e6e0070) & 0x40;
-		if (++timeout > TIMEOUT_AST2150) {
-			ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-			return 0xffffffff;
-		}
-	} while (!data);
-	data = (ast_mindwm(ast, 0x1e6e0070) & 0x80) >> 7;
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	return data;
-}
-#endif
-
-static int cbrtest_ast2150(struct ast_device *ast)
-{
-	int i;
-
-	for (i = 0; i < 8; i++)
-		if (mmctestburst2_ast2150(ast, i))
-			return 0;
-	return 1;
-}
-
-static int cbrscan_ast2150(struct ast_device *ast, int busw)
-{
-	u32 patcnt, loop;
-
-	for (patcnt = 0; patcnt < CBR_PATNUM_AST2150; patcnt++) {
-		ast_moutdwm(ast, 0x1e6e007c, pattern_AST2150[patcnt]);
-		for (loop = 0; loop < CBR_PASSNUM_AST2150; loop++) {
-			if (cbrtest_ast2150(ast))
-				break;
-		}
-		if (loop == CBR_PASSNUM_AST2150)
-			return 0;
-	}
-	return 1;
-}
-
-
-static void cbrdlli_ast2150(struct ast_device *ast, int busw)
-{
-	u32 dll_min[4], dll_max[4], dlli, data, passcnt;
-
-cbr_start:
-	dll_min[0] = dll_min[1] = dll_min[2] = dll_min[3] = 0xff;
-	dll_max[0] = dll_max[1] = dll_max[2] = dll_max[3] = 0x0;
-	passcnt = 0;
-
-	for (dlli = 0; dlli < 100; dlli++) {
-		ast_moutdwm(ast, 0x1e6e0068, dlli | (dlli << 8) | (dlli << 16) | (dlli << 24));
-		data = cbrscan_ast2150(ast, busw);
-		if (data != 0) {
-			if (data & 0x1) {
-				if (dll_min[0] > dlli)
-					dll_min[0] = dlli;
-				if (dll_max[0] < dlli)
-					dll_max[0] = dlli;
-			}
-			passcnt++;
-		} else if (passcnt >= CBR_THRESHOLD_AST2150)
-			goto cbr_start;
-	}
-	if (dll_max[0] == 0 || (dll_max[0]-dll_min[0]) < CBR_THRESHOLD_AST2150)
-		goto cbr_start;
-
-	dlli = dll_min[0] + (((dll_max[0] - dll_min[0]) * 7) >> 4);
-	ast_moutdwm(ast, 0x1e6e0068, dlli | (dlli << 8) | (dlli << 16) | (dlli << 24));
-}
-
-
-
-static void ast_init_dram_reg(struct ast_device *ast)
-{
-	u8 j;
-	u32 data, temp, i;
-	const struct ast_dramstruct *dram_reg_info;
-
-	j = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
-
-	if ((j & 0x80) == 0) { /* VGA only */
-		if (IS_AST_GEN1(ast)) {
-			dram_reg_info = ast2000_dram_table_data;
-			ast_write32(ast, 0xf004, 0x1e6e0000);
-			ast_write32(ast, 0xf000, 0x1);
-			ast_write32(ast, 0x10100, 0xa8);
-
-			do {
-				;
-			} while (ast_read32(ast, 0x10100) != 0xa8);
-		} else { /* GEN2/GEN3 */
-			if (ast->chip == AST2100 || ast->chip == AST2200)
-				dram_reg_info = ast2100_dram_table_data;
-			else
-				dram_reg_info = ast1100_dram_table_data;
-
-			ast_write32(ast, 0xf004, 0x1e6e0000);
-			ast_write32(ast, 0xf000, 0x1);
-			ast_write32(ast, 0x12000, 0x1688A8A8);
-			do {
-				;
-			} while (ast_read32(ast, 0x12000) != 0x01);
-
-			ast_write32(ast, 0x10000, 0xfc600309);
-			do {
-				;
-			} while (ast_read32(ast, 0x10000) != 0x01);
-		}
-
-		while (dram_reg_info->index != 0xffff) {
-			if (dram_reg_info->index == 0xff00) {/* delay fn */
-				for (i = 0; i < 15; i++)
-					udelay(dram_reg_info->data);
-			} else if (dram_reg_info->index == 0x4 && !IS_AST_GEN1(ast)) {
-				data = dram_reg_info->data;
-				if (ast->dram_type == AST_DRAM_1Gx16)
-					data = 0x00000d89;
-				else if (ast->dram_type == AST_DRAM_1Gx32)
-					data = 0x00000c8d;
-
-				temp = ast_read32(ast, 0x12070);
-				temp &= 0xc;
-				temp <<= 2;
-				ast_write32(ast, 0x10000 + dram_reg_info->index, data | temp);
-			} else
-				ast_write32(ast, 0x10000 + dram_reg_info->index, dram_reg_info->data);
-			dram_reg_info++;
-		}
-
-		/* AST 2100/2150 DRAM calibration */
-		data = ast_read32(ast, 0x10120);
-		if (data == 0x5061) { /* 266Mhz */
-			data = ast_read32(ast, 0x10004);
-			if (data & 0x40)
-				cbrdlli_ast2150(ast, 16); /* 16 bits */
-			else
-				cbrdlli_ast2150(ast, 32); /* 32 bits */
-		}
-
-		switch (AST_GEN(ast)) {
-		case 1:
-			temp = ast_read32(ast, 0x10140);
-			ast_write32(ast, 0x10140, temp | 0x40);
-			break;
-		case 2:
-		case 3:
-			temp = ast_read32(ast, 0x1200c);
-			ast_write32(ast, 0x1200c, temp & 0xfffffffd);
-			temp = ast_read32(ast, 0x12040);
-			ast_write32(ast, 0x12040, temp | 0x40);
-			break;
-		default:
-			break;
-		}
-	}
-
-	/* wait ready */
-	do {
-		j = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
-	} while ((j & 0x40) == 0);
-}
-
 int ast_post_gpu(struct ast_device *ast)
 {
 	int ret;
@@ -356,15 +128,14 @@ int ast_post_gpu(struct ast_device *ast)
 		ret = ast_2300_post(ast);
 		if (ret)
 			return ret;
+	} else  if (AST_GEN(ast) >= 2) {
+		ret = ast_2100_post(ast);
+		if (ret)
+			return ret;
 	} else  {
-		if (ast->config_mode == ast_use_p2a) {
-			ast_init_dram_reg(ast);
-		} else {
-			if (ast->tx_chip == AST_TX_SIL164) {
-				/* Enable DVO */
-				ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
-			}
-		}
+		ret = ast_2000_post(ast);
+		if (ret)
+			return ret;
 	}
 
 	return 0;