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drm/ast: Add helpers for VBIOS mode lookup

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Mode lines are independent from hardware Gen or TX chip, so hide all
VBIOS mode tables in ast_vbios.c.

Move the look-up code for VBIOS modes from ast_vbios_get_mode_info()
to ast_vbios_find_mode(). The new look-up function respects the
supported-mode flags in struct ast_device. For example, if a device
does not have struct ast_device.support_fullhd set, the helper does
not return a valid mode for 1920x1080. Taking the supported-mode flags
into account allows for making the VBIOS tables the single reference
for validating and setting display modes against hardware capabilities.

v2:
- replace mode switch with look-up table (Jocelyn)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-11-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2025-01-31 10:21:10 +01:00
parent 192cc9f2b7
commit 517e28d40c
7 changed files with 360 additions and 263 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/ast/Makefile
View File

@@ -13,6 +13,7 @@ ast-y := \
ast_mode.o \
ast_post.o \
ast_sil164.o \
ast_vbios.o \
ast_vga.o
obj-$(CONFIG_DRM_AST) := ast.o

1
drivers/gpu/drm/ast/ast_dp.c
View File

@@ -12,6 +12,7 @@
#include <drm/drm_probe_helper.h>
#include "ast_drv.h"
#include "ast_vbios.h"
static bool ast_astdp_is_connected(struct ast_device *ast)
{

18
drivers/gpu/drm/ast/ast_drv.h
View File

@@ -39,6 +39,8 @@
#include "ast_reg.h"
struct ast_vbios_enhtable;
#define DRIVER_AUTHOR "Dave Airlie"
#define DRIVER_NAME "ast"
@@ -350,22 +352,6 @@ struct ast_vbios_stdtable {
u8 gr[9];
};
struct ast_vbios_enhtable {
u32 ht;
u32 hde;
u32 hfp;
u32 hsync;
u32 vt;
u32 vde;
u32 vfp;
u32 vsync;
u32 dclk_index;
u32 flags;
u32 refresh_rate;
u32 refresh_rate_index;
u32 mode_id;
};
struct ast_vbios_dclk_info {
u8 param1;
u8 param2;

77
drivers/gpu/drm/ast/ast_mode.c
View File

@@ -47,6 +47,7 @@
#include "ast_drv.h"
#include "ast_tables.h"
#include "ast_vbios.h"
#define AST_LUT_SIZE 256
@@ -106,14 +107,12 @@ static void ast_crtc_set_gamma(struct ast_device *ast,
}
}
static bool ast_get_vbios_mode_info(const struct drm_format_info *format,
static bool ast_get_vbios_mode_info(struct ast_device *ast,
const struct drm_format_info *format,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode,
struct ast_vbios_mode_info *vbios_mode)
{
u32 refresh_rate_index = 0, refresh_rate;
const struct ast_vbios_enhtable *best = NULL;
const struct ast_vbios_enhtable *loop;
u32 hborder, vborder;
switch (format->cpp[0] * 8) {
@@ -131,72 +130,9 @@ static bool ast_get_vbios_mode_info(const struct drm_format_info *format,
return false;
}
switch (mode->hdisplay) {
case 640:
vbios_mode->enh_table = &res_640x480[refresh_rate_index];
break;
case 800:
vbios_mode->enh_table = &res_800x600[refresh_rate_index];
break;
case 1024:
vbios_mode->enh_table = &res_1024x768[refresh_rate_index];
break;
case 1152:
vbios_mode->enh_table = &res_1152x864[refresh_rate_index];
break;
case 1280:
if (mode->vdisplay == 800)
vbios_mode->enh_table = &res_1280x800[refresh_rate_index];
else
vbios_mode->enh_table = &res_1280x1024[refresh_rate_index];
break;
case 1360:
vbios_mode->enh_table = &res_1360x768[refresh_rate_index];
break;
case 1440:
vbios_mode->enh_table = &res_1440x900[refresh_rate_index];
break;
case 1600:
if (mode->vdisplay == 900)
vbios_mode->enh_table = &res_1600x900[refresh_rate_index];
else
vbios_mode->enh_table = &res_1600x1200[refresh_rate_index];
break;
case 1680:
vbios_mode->enh_table = &res_1680x1050[refresh_rate_index];
break;
case 1920:
if (mode->vdisplay == 1080)
vbios_mode->enh_table = &res_1920x1080[refresh_rate_index];
else
vbios_mode->enh_table = &res_1920x1200[refresh_rate_index];
break;
default:
vbios_mode->enh_table = ast_vbios_find_mode(ast, mode);
if (!vbios_mode->enh_table)
return false;
}
refresh_rate = drm_mode_vrefresh(mode);
loop = vbios_mode->enh_table;
while (ast_vbios_mode_is_valid(loop)) {
if (((mode->flags & DRM_MODE_FLAG_NVSYNC) && (loop->flags & PVSync)) ||
((mode->flags & DRM_MODE_FLAG_PVSYNC) && (loop->flags & NVSync)) ||
((mode->flags & DRM_MODE_FLAG_NHSYNC) && (loop->flags & PHSync)) ||
((mode->flags & DRM_MODE_FLAG_PHSYNC) && (loop->flags & NHSync))) {
loop++;
continue;
}
if (loop->refresh_rate <= refresh_rate &&
(!best || loop->refresh_rate > best->refresh_rate))
best = loop;
loop++;
}
if (!best)
return false;
vbios_mode->enh_table = best;
hborder = (vbios_mode->enh_table->flags & HBorder) ? 8 : 0;
vborder = (vbios_mode->enh_table->flags & VBorder) ? 8 : 0;
@@ -1109,6 +1045,7 @@ static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
struct ast_crtc_state *old_ast_crtc_state = to_ast_crtc_state(old_crtc_state);
struct drm_device *dev = crtc->dev;
struct ast_device *ast = to_ast_device(dev);
struct ast_crtc_state *ast_state;
const struct drm_format_info *format;
bool succ;
@@ -1143,7 +1080,7 @@ static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
}
}
succ = ast_get_vbios_mode_info(format, &crtc_state->mode,
succ = ast_get_vbios_mode_info(ast, format, &crtc_state->mode,
&crtc_state->adjusted_mode,
&ast_state->vbios_mode_info);
if (!succ)

177
drivers/gpu/drm/ast/ast_tables.h
View File

@@ -33,54 +33,6 @@
#define HiCModeIndex 3
#define TrueCModeIndex 4
#define Charx8Dot 0x00000001
#define HalfDCLK 0x00000002
#define DoubleScanMode 0x00000004
#define LineCompareOff 0x00000008
#define HBorder 0x00000020
#define VBorder 0x00000010
#define WideScreenMode 0x00000100
#define NewModeInfo 0x00000200
#define NHSync 0x00000400
#define PHSync 0x00000800
#define NVSync 0x00001000
#define PVSync 0x00002000
#define SyncPP (PVSync | PHSync)
#define SyncPN (PVSync | NHSync)
#define SyncNP (NVSync | PHSync)
#define SyncNN (NVSync | NHSync)
#define AST2500PreCatchCRT 0x00004000
/* DCLK Index */
#define VCLK25_175 0x00
#define VCLK28_322 0x01
#define VCLK31_5 0x02
#define VCLK36 0x03
#define VCLK40 0x04
#define VCLK49_5 0x05
#define VCLK50 0x06
#define VCLK56_25 0x07
#define VCLK65 0x08
#define VCLK75 0x09
#define VCLK78_75 0x0A
#define VCLK94_5 0x0B
#define VCLK108 0x0C
#define VCLK135 0x0D
#define VCLK157_5 0x0E
#define VCLK162 0x0F
/* #define VCLK193_25 0x10 */
#define VCLK154 0x10
#define VCLK83_5 0x11
#define VCLK106_5 0x12
#define VCLK146_25 0x13
#define VCLK148_5 0x14
#define VCLK71 0x15
#define VCLK88_75 0x16
#define VCLK119 0x17
#define VCLK85_5 0x18
#define VCLK97_75 0x19
#define VCLK118_25 0x1A
static const struct ast_vbios_dclk_info dclk_table[] = {
{0x2C, 0xE7, 0x03}, /* 00: VCLK25_175 */
{0x95, 0x62, 0x03}, /* 01: VCLK28_322 */
@@ -214,133 +166,4 @@ static const struct ast_vbios_stdtable vbios_stdtable[] = {
},
};
#define AST_VBIOS_INVALID_MODE \
{0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u}
static inline bool ast_vbios_mode_is_valid(const struct ast_vbios_enhtable *vmode)
{
return vmode->ht && vmode->vt && vmode->refresh_rate;
}
static const struct ast_vbios_enhtable res_640x480[] = {
{ 800, 640, 8, 96, 525, 480, 2, 2, VCLK25_175, /* 60Hz */
(SyncNN | HBorder | VBorder | Charx8Dot), 60, 1, 0x2E },
{ 832, 640, 16, 40, 520, 480, 1, 3, VCLK31_5, /* 72Hz */
(SyncNN | HBorder | VBorder | Charx8Dot), 72, 2, 0x2E },
{ 840, 640, 16, 64, 500, 480, 1, 3, VCLK31_5, /* 75Hz */
(SyncNN | Charx8Dot) , 75, 3, 0x2E },
{ 832, 640, 56, 56, 509, 480, 1, 3, VCLK36, /* 85Hz */
(SyncNN | Charx8Dot) , 85, 4, 0x2E },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_800x600[] = {
{1024, 800, 24, 72, 625, 600, 1, 2, VCLK36, /* 56Hz */
(SyncPP | Charx8Dot), 56, 1, 0x30 },
{1056, 800, 40, 128, 628, 600, 1, 4, VCLK40, /* 60Hz */
(SyncPP | Charx8Dot), 60, 2, 0x30 },
{1040, 800, 56, 120, 666, 600, 37, 6, VCLK50, /* 72Hz */
(SyncPP | Charx8Dot), 72, 3, 0x30 },
{1056, 800, 16, 80, 625, 600, 1, 3, VCLK49_5, /* 75Hz */
(SyncPP | Charx8Dot), 75, 4, 0x30 },
{1048, 800, 32, 64, 631, 600, 1, 3, VCLK56_25, /* 85Hz */
(SyncPP | Charx8Dot), 84, 5, 0x30 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1024x768[] = {
{1344, 1024, 24, 136, 806, 768, 3, 6, VCLK65, /* 60Hz */
(SyncNN | Charx8Dot), 60, 1, 0x31 },
{1328, 1024, 24, 136, 806, 768, 3, 6, VCLK75, /* 70Hz */
(SyncNN | Charx8Dot), 70, 2, 0x31 },
{1312, 1024, 16, 96, 800, 768, 1, 3, VCLK78_75, /* 75Hz */
(SyncPP | Charx8Dot), 75, 3, 0x31 },
{1376, 1024, 48, 96, 808, 768, 1, 3, VCLK94_5, /* 85Hz */
(SyncPP | Charx8Dot), 84, 4, 0x31 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1280x1024[] = {
{1688, 1280, 48, 112, 1066, 1024, 1, 3, VCLK108, /* 60Hz */
(SyncPP | Charx8Dot), 60, 1, 0x32 },
{1688, 1280, 16, 144, 1066, 1024, 1, 3, VCLK135, /* 75Hz */
(SyncPP | Charx8Dot), 75, 2, 0x32 },
{1728, 1280, 64, 160, 1072, 1024, 1, 3, VCLK157_5, /* 85Hz */
(SyncPP | Charx8Dot), 85, 3, 0x32 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1600x1200[] = {
{2160, 1600, 64, 192, 1250, 1200, 1, 3, VCLK162, /* 60Hz */
(SyncPP | Charx8Dot), 60, 1, 0x33 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1152x864[] = {
{1600, 1152, 64, 128, 900, 864, 1, 3, VCLK108, /* 75Hz */
(SyncPP | Charx8Dot | NewModeInfo), 75, 1, 0x3B },
AST_VBIOS_INVALID_MODE, /* end */
};
/* 16:9 */
static const struct ast_vbios_enhtable res_1360x768[] = {
{1792, 1360, 64, 112, 795, 768, 3, 6, VCLK85_5, /* 60Hz */
(SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 1, 0x39 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1600x900[] = {
{1760, 1600, 48, 32, 926, 900, 3, 5, VCLK97_75, /* 60Hz CVT RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x3A },
{2112, 1600, 88, 168, 934, 900, 3, 5, VCLK118_25, /* 60Hz CVT */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x3A },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1920x1080[] = {
{2200, 1920, 88, 44, 1125, 1080, 4, 5, VCLK148_5, /* 60Hz */
(SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x38 },
AST_VBIOS_INVALID_MODE, /* end */
};
/* 16:10 */
static const struct ast_vbios_enhtable res_1280x800[] = {
{1440, 1280, 48, 32, 823, 800, 3, 6, VCLK71, /* 60Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x35 },
{1680, 1280, 72,128, 831, 800, 3, 6, VCLK83_5, /* 60Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x35 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1440x900[] = {
{1600, 1440, 48, 32, 926, 900, 3, 6, VCLK88_75, /* 60Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x36 },
{1904, 1440, 80,152, 934, 900, 3, 6, VCLK106_5, /* 60Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x36 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1680x1050[] = {
{1840, 1680, 48, 32, 1080, 1050, 3, 6, VCLK119, /* 60Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x37 },
{2240, 1680,104,176, 1089, 1050, 3, 6, VCLK146_25, /* 60Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x37 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1920x1200[] = {
{2080, 1920, 48, 32, 1235, 1200, 3, 6, VCLK154, /* 60Hz RB*/
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x34 },
AST_VBIOS_INVALID_MODE, /* end */
};
#endif

241
drivers/gpu/drm/ast/ast_vbios.c Normal file
View File

@@ -0,0 +1,241 @@
// SPDX-License-Identifier: MIT
/*
* Copyright (c) 2005 ASPEED Technology Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the authors not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "ast_drv.h"
#include "ast_vbios.h"
/* 4:3 */
static const struct ast_vbios_enhtable res_640x480[] = {
{ 800, 640, 8, 96, 525, 480, 2, 2, VCLK25_175, /* 60 Hz */
(SyncNN | HBorder | VBorder | Charx8Dot), 60, 1, 0x2e },
{ 832, 640, 16, 40, 520, 480, 1, 3, VCLK31_5, /* 72 Hz */
(SyncNN | HBorder | VBorder | Charx8Dot), 72, 2, 0x2e },
{ 840, 640, 16, 64, 500, 480, 1, 3, VCLK31_5, /* 75 Hz */
(SyncNN | Charx8Dot), 75, 3, 0x2e },
{ 832, 640, 56, 56, 509, 480, 1, 3, VCLK36, /* 85 Hz */
(SyncNN | Charx8Dot), 85, 4, 0x2e },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_800x600[] = {
{ 1024, 800, 24, 72, 625, 600, 1, 2, VCLK36, /* 56 Hz */
(SyncPP | Charx8Dot), 56, 1, 0x30 },
{ 1056, 800, 40, 128, 628, 600, 1, 4, VCLK40, /* 60 Hz */
(SyncPP | Charx8Dot), 60, 2, 0x30 },
{ 1040, 800, 56, 120, 666, 600, 37, 6, VCLK50, /* 72 Hz */
(SyncPP | Charx8Dot), 72, 3, 0x30 },
{ 1056, 800, 16, 80, 625, 600, 1, 3, VCLK49_5, /* 75 Hz */
(SyncPP | Charx8Dot), 75, 4, 0x30 },
{ 1048, 800, 32, 64, 631, 600, 1, 3, VCLK56_25, /* 85 Hz */
(SyncPP | Charx8Dot), 84, 5, 0x30 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1024x768[] = {
{ 1344, 1024, 24, 136, 806, 768, 3, 6, VCLK65, /* 60 Hz */
(SyncNN | Charx8Dot), 60, 1, 0x31 },
{ 1328, 1024, 24, 136, 806, 768, 3, 6, VCLK75, /* 70 Hz */
(SyncNN | Charx8Dot), 70, 2, 0x31 },
{ 1312, 1024, 16, 96, 800, 768, 1, 3, VCLK78_75, /* 75 Hz */
(SyncPP | Charx8Dot), 75, 3, 0x31 },
{ 1376, 1024, 48, 96, 808, 768, 1, 3, VCLK94_5, /* 85 Hz */
(SyncPP | Charx8Dot), 84, 4, 0x31 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1152x864[] = {
{ 1600, 1152, 64, 128, 900, 864, 1, 3, VCLK108, /* 75 Hz */
(SyncPP | Charx8Dot | NewModeInfo), 75, 1, 0x3b },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1280x1024[] = {
{ 1688, 1280, 48, 112, 1066, 1024, 1, 3, VCLK108, /* 60 Hz */
(SyncPP | Charx8Dot), 60, 1, 0x32 },
{ 1688, 1280, 16, 144, 1066, 1024, 1, 3, VCLK135, /* 75 Hz */
(SyncPP | Charx8Dot), 75, 2, 0x32 },
{ 1728, 1280, 64, 160, 1072, 1024, 1, 3, VCLK157_5, /* 85 Hz */
(SyncPP | Charx8Dot), 85, 3, 0x32 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1600x1200[] = {
{ 2160, 1600, 64, 192, 1250, 1200, 1, 3, VCLK162, /* 60 Hz */
(SyncPP | Charx8Dot), 60, 1, 0x33 },
AST_VBIOS_INVALID_MODE, /* end */
};
/* 16:9 */
static const struct ast_vbios_enhtable res_1360x768[] = {
{ 1792, 1360, 64, 112, 795, 768, 3, 6, VCLK85_5, /* 60 Hz */
(SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 1, 0x39 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1600x900[] = {
{ 1760, 1600, 48, 32, 926, 900, 3, 5, VCLK97_75, /* 60 Hz CVT RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x3a },
{ 2112, 1600, 88, 168, 934, 900, 3, 5, VCLK118_25, /* 60 Hz CVT */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x3a },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1920x1080[] = {
{ 2200, 1920, 88, 44, 1125, 1080, 4, 5, VCLK148_5, /* 60 Hz */
(SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x38 },
AST_VBIOS_INVALID_MODE, /* end */
};
/* 16:10 */
static const struct ast_vbios_enhtable res_1280x800[] = {
{ 1440, 1280, 48, 32, 823, 800, 3, 6, VCLK71, /* 60 Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x35 },
{ 1680, 1280, 72, 128, 831, 800, 3, 6, VCLK83_5, /* 60 Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x35 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1440x900[] = {
{ 1600, 1440, 48, 32, 926, 900, 3, 6, VCLK88_75, /* 60 Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x36 },
{ 1904, 1440, 80, 152, 934, 900, 3, 6, VCLK106_5, /* 60 Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x36 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1680x1050[] = {
{ 1840, 1680, 48, 32, 1080, 1050, 3, 6, VCLK119, /* 60 Hz RB */
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x37 },
{ 2240, 1680, 104, 176, 1089, 1050, 3, 6, VCLK146_25, /* 60 Hz */
(SyncPN | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo), 60, 2, 0x37 },
AST_VBIOS_INVALID_MODE, /* end */
};
static const struct ast_vbios_enhtable res_1920x1200[] = {
{ 2080, 1920, 48, 32, 1235, 1200, 3, 6, VCLK154, /* 60 Hz RB*/
(SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
AST2500PreCatchCRT), 60, 1, 0x34 },
AST_VBIOS_INVALID_MODE, /* end */
};
/*
* VBIOS mode tables
*/
static const struct ast_vbios_enhtable *res_table_wuxga[] = {
&res_1920x1200[0],
NULL,
};
static const struct ast_vbios_enhtable *res_table_fullhd[] = {
&res_1920x1080[0],
NULL,
};
static const struct ast_vbios_enhtable *res_table_wsxga_p[] = {
&res_1280x800[0],
&res_1360x768[0],
&res_1440x900[0],
&res_1600x900[0],
&res_1680x1050[0],
NULL,
};
static const struct ast_vbios_enhtable *res_table[] = {
&res_640x480[0],
&res_800x600[0],
&res_1024x768[0],
&res_1152x864[0],
&res_1280x1024[0],
&res_1600x1200[0],
NULL,
};
static const struct ast_vbios_enhtable *
__ast_vbios_find_mode_table(const struct ast_vbios_enhtable **vmode_tables,
unsigned int hdisplay,
unsigned int vdisplay)
{
while (*vmode_tables) {
if ((*vmode_tables)->hde == hdisplay && (*vmode_tables)->vde == vdisplay)
return *vmode_tables;
++vmode_tables;
}
return NULL;
}
static const struct ast_vbios_enhtable *ast_vbios_find_mode_table(const struct ast_device *ast,
unsigned int hdisplay,
unsigned int vdisplay)
{
const struct ast_vbios_enhtable *vmode_table = NULL;
if (ast->support_wuxga)
vmode_table = __ast_vbios_find_mode_table(res_table_wuxga, hdisplay, vdisplay);
if (!vmode_table && ast->support_fullhd)
vmode_table = __ast_vbios_find_mode_table(res_table_fullhd, hdisplay, vdisplay);
if (!vmode_table && ast->support_wsxga_p)
vmode_table = __ast_vbios_find_mode_table(res_table_wsxga_p, hdisplay, vdisplay);
if (!vmode_table)
vmode_table = __ast_vbios_find_mode_table(res_table, hdisplay, vdisplay);
return vmode_table;
}
const struct ast_vbios_enhtable *ast_vbios_find_mode(const struct ast_device *ast,
const struct drm_display_mode *mode)
{
const struct ast_vbios_enhtable *best_vmode = NULL;
const struct ast_vbios_enhtable *vmode_table;
const struct ast_vbios_enhtable *vmode;
u32 refresh_rate;
vmode_table = ast_vbios_find_mode_table(ast, mode->hdisplay, mode->vdisplay);
if (!vmode_table)
return NULL;
refresh_rate = drm_mode_vrefresh(mode);
for (vmode = vmode_table; ast_vbios_mode_is_valid(vmode); ++vmode) {
if (((mode->flags & DRM_MODE_FLAG_NVSYNC) && (vmode->flags & PVSync)) ||
((mode->flags & DRM_MODE_FLAG_PVSYNC) && (vmode->flags & NVSync)) ||
((mode->flags & DRM_MODE_FLAG_NHSYNC) && (vmode->flags & PHSync)) ||
((mode->flags & DRM_MODE_FLAG_PHSYNC) && (vmode->flags & NHSync))) {
continue;
}
if (vmode->refresh_rate <= refresh_rate &&
(!best_vmode || vmode->refresh_rate > best_vmode->refresh_rate))
best_vmode = vmode;
}
return best_vmode;
}

108
drivers/gpu/drm/ast/ast_vbios.h Normal file
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/* SPDX-License-Identifier: MIT */
/*
* Copyright (c) 2005 ASPEED Technology Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the authors not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* Ported from xf86-video-ast driver */
#ifndef AST_VBIOS_H
#define AST_VBIOS_H
#include <linux/types.h>
struct ast_device;
struct drm_display_mode;
#define Charx8Dot 0x00000001
#define HalfDCLK 0x00000002
#define DoubleScanMode 0x00000004
#define LineCompareOff 0x00000008
#define HBorder 0x00000020
#define VBorder 0x00000010
#define WideScreenMode 0x00000100
#define NewModeInfo 0x00000200
#define NHSync 0x00000400
#define PHSync 0x00000800
#define NVSync 0x00001000
#define PVSync 0x00002000
#define SyncPP (PVSync | PHSync)
#define SyncPN (PVSync | NHSync)
#define SyncNP (NVSync | PHSync)
#define SyncNN (NVSync | NHSync)
#define AST2500PreCatchCRT 0x00004000
/* DCLK Index */
#define VCLK25_175 0x00
#define VCLK28_322 0x01
#define VCLK31_5 0x02
#define VCLK36 0x03
#define VCLK40 0x04
#define VCLK49_5 0x05
#define VCLK50 0x06
#define VCLK56_25 0x07
#define VCLK65 0x08
#define VCLK75 0x09
#define VCLK78_75 0x0a
#define VCLK94_5 0x0b
#define VCLK108 0x0c
#define VCLK135 0x0d
#define VCLK157_5 0x0e
#define VCLK162 0x0f
/* #define VCLK193_25 0x10 */
#define VCLK154 0x10
#define VCLK83_5 0x11
#define VCLK106_5 0x12
#define VCLK146_25 0x13
#define VCLK148_5 0x14
#define VCLK71 0x15
#define VCLK88_75 0x16
#define VCLK119 0x17
#define VCLK85_5 0x18
#define VCLK97_75 0x19
#define VCLK118_25 0x1a
struct ast_vbios_enhtable {
u32 ht;
u32 hde;
u32 hfp;
u32 hsync;
u32 vt;
u32 vde;
u32 vfp;
u32 vsync;
u32 dclk_index;
u32 flags;
u32 refresh_rate;
u32 refresh_rate_index;
u32 mode_id;
};
#define AST_VBIOS_INVALID_MODE \
{0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u}
static inline bool ast_vbios_mode_is_valid(const struct ast_vbios_enhtable *vmode)
{
return vmode->ht && vmode->vt && vmode->refresh_rate;
}
const struct ast_vbios_enhtable *ast_vbios_find_mode(const struct ast_device *ast,
const struct drm_display_mode *mode);
#endif