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Subject[PATCH 1/2] viafb: refresh rate bug collection
Date
This patch fixes multiple issues with the handling of refresh rates
especially for multi-display setups. If you experienced problems
with wrong refresh rates this patch might fix them.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
---
drivers/video/via/chip.h | 1 -
drivers/video/via/hw.c | 17 ++++++---------
drivers/video/via/hw.h | 3 +-
drivers/video/via/viafbdev.c | 45 ++++++++++++++++++++++++++---------------
4 files changed, 36 insertions(+), 30 deletions(-)
diff --git a/drivers/video/via/chip.h b/drivers/video/via/chip.h
index 781f3aa..29d7024 100644
--- a/drivers/video/via/chip.h
+++ b/drivers/video/via/chip.h
@@ -139,7 +139,6 @@ struct chip_information {

struct crt_setting_information {
int iga_path;
- int refresh_rate;
};

struct tmds_setting_information {
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index 5728fd7..dc4c778 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -2002,13 +2002,15 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
int i;
int index = 0;
int h_addr, v_addr;
- u32 pll_D_N, clock;
+ u32 pll_D_N, clock, refresh = viafb_refresh;
+
+ if (viafb_SAMM_ON && set_iga == IGA2)
+ refresh = viafb_refresh1;

for (i = 0; i < video_mode->mode_array; i++) {
index = i;

- if (crt_table[i].refresh_rate == viaparinfo->
- crt_setting_info->refresh_rate)
+ if (crt_table[i].refresh_rate == refresh)
break;
}

@@ -2019,7 +2021,7 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
if ((viafb_LCD_ON | viafb_DVI_ON)
&& video_mode->crtc[0].crtc.hor_addr == 640
&& video_mode->crtc[0].crtc.ver_addr == 480
- && viaparinfo->crt_setting_info->refresh_rate == 60) {
+ && refresh == 60) {
/* The border is 8 pixels. */
crt_reg.hor_blank_start = crt_reg.hor_blank_start - 8;

@@ -2070,7 +2072,6 @@ void __devinit viafb_init_chip_info(int chip_type)
init_lvds_chip_info();

viaparinfo->crt_setting_info->iga_path = IGA1;
- viaparinfo->crt_setting_info->refresh_rate = viafb_refresh;

/*Set IGA path for each device */
viafb_set_iga_path();
@@ -2083,13 +2084,9 @@ void __devinit viafb_init_chip_info(int chip_type)
viaparinfo->lvds_setting_info->lcd_mode;
}

-void viafb_update_device_setting(int hres, int vres,
- int bpp, int vmode_refresh, int flag)
+void viafb_update_device_setting(int hres, int vres, int bpp, int flag)
{
if (flag == 0) {
- viaparinfo->crt_setting_info->refresh_rate =
- vmode_refresh;
-
viaparinfo->tmds_setting_info->h_active = hres;
viaparinfo->tmds_setting_info->v_active = vres;

diff --git a/drivers/video/via/hw.h b/drivers/video/via/hw.h
index 7295263..8858593 100644
--- a/drivers/video/via/hw.h
+++ b/drivers/video/via/hw.h
@@ -949,8 +949,7 @@ void __devinit viafb_init_chip_info(int chip_type);
void __devinit viafb_init_dac(int set_iga);
int viafb_get_pixclock(int hres, int vres, int vmode_refresh);
int viafb_get_refresh(int hres, int vres, u32 float_refresh);
-void viafb_update_device_setting(int hres, int vres, int bpp,
- int vmode_refresh, int flag);
+void viafb_update_device_setting(int hres, int vres, int bpp, int flag);

void viafb_set_iga_path(void);
void viafb_set_primary_color_register(u8 index, u8 red, u8 green, u8 blue);
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index f555b89..fd6a15f 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -182,13 +182,24 @@ static int viafb_release(struct fb_info *info, int user)
return 0;
}

+static inline int get_var_refresh(struct fb_var_screeninfo *var)
+{
+ u32 htotal, vtotal;
+
+ htotal = var->left_margin + var->xres + var->right_margin
+ + var->hsync_len;
+ vtotal = var->upper_margin + var->yres + var->lower_margin
+ + var->vsync_len;
+ return PICOS2KHZ(var->pixclock) * 1000 / (htotal * vtotal);
+}
+
static int viafb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
- int htotal, vtotal, depth;
+ int depth, refresh;
struct VideoModeTable *vmode_entry;
struct viafb_par *ppar = info->par;
- u32 long_refresh, line;
+ u32 line;

DEBUG_MSG(KERN_INFO "viafb_check_var!\n");
/* Sanity check */
@@ -231,17 +242,11 @@ static int viafb_check_var(struct fb_var_screeninfo *var,
/* Based on var passed in to calculate the refresh,
* because our driver use some modes special.
*/
- htotal = var->xres + var->left_margin +
- var->right_margin + var->hsync_len;
- vtotal = var->yres + var->upper_margin +
- var->lower_margin + var->vsync_len;
- long_refresh = 1000000000UL / var->pixclock * 1000;
- long_refresh /= (htotal * vtotal);
-
- viafb_refresh = viafb_get_refresh(var->xres, var->yres, long_refresh);
+ refresh = viafb_get_refresh(var->xres, var->yres,
+ get_var_refresh(var));

/* Adjust var according to our driver's own table */
- viafb_fill_var_timing_info(var, viafb_refresh, vmode_entry);
+ viafb_fill_var_timing_info(var, refresh, vmode_entry);
if (var->accel_flags & FB_ACCELF_TEXT &&
!ppar->shared->vdev->engine_mmio)
var->accel_flags = 0;
@@ -253,12 +258,13 @@ static int viafb_set_par(struct fb_info *info)
{
struct viafb_par *viapar = info->par;
struct VideoModeTable *vmode_entry, *vmode_entry1 = NULL;
+ int refresh;
DEBUG_MSG(KERN_INFO "viafb_set_par!\n");

viafb_update_fix(info);
viapar->depth = fb_get_color_depth(&info->var, &info->fix);
viafb_update_device_setting(viafbinfo->var.xres, viafbinfo->var.yres,
- viafbinfo->var.bits_per_pixel, viafb_refresh, 0);
+ viafbinfo->var.bits_per_pixel, 0);

vmode_entry = viafb_get_mode(viafbinfo->var.xres, viafbinfo->var.yres);
if (viafb_dual_fb) {
@@ -266,7 +272,7 @@ static int viafb_set_par(struct fb_info *info)
viafbinfo1->var.yres);
viafb_update_device_setting(viafbinfo1->var.xres,
viafbinfo1->var.yres, viafbinfo1->var.bits_per_pixel,
- viafb_refresh1, 1);
+ 1);
} else if (viafb_SAMM_ON == 1) {
DEBUG_MSG(KERN_INFO
"viafb_second_xres = %d, viafb_second_yres = %d, bpp = %d\n",
@@ -275,14 +281,19 @@ static int viafb_set_par(struct fb_info *info)
viafb_second_yres);

viafb_update_device_setting(viafb_second_xres,
- viafb_second_yres, viafb_bpp1, viafb_refresh1, 1);
+ viafb_second_yres, viafb_bpp1, 1);
}

+ refresh = viafb_get_refresh(info->var.xres, info->var.yres,
+ get_var_refresh(&info->var));
if (vmode_entry) {
- if (viafb_dual_fb && viapar->iga_path == IGA2)
+ if (viafb_dual_fb && viapar->iga_path == IGA2) {
viafb_bpp1 = info->var.bits_per_pixel;
- else
+ viafb_refresh1 = refresh;
+ } else {
viafb_bpp = info->var.bits_per_pixel;
+ viafb_refresh = refresh;
+ }

if (info->var.accel_flags & FB_ACCELF_TEXT)
info->flags &= ~FBINFO_HWACCEL_DISABLED;
@@ -1843,7 +1854,7 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev)
default_var.bits_per_pixel = viafb_bpp1;
default_var.pixclock =
viafb_get_pixclock(viafb_second_xres, viafb_second_yres,
- viafb_refresh);
+ viafb_refresh1);
default_var.left_margin = (viafb_second_xres >> 3) & 0xf8;
default_var.right_margin = 32;
default_var.upper_margin = 16;
--
1.6.3.2


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