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viafb: rework output device routing
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This patch rips the device routing out of the 3 main functions to
separate functions to make them available for transition to a better
controlling scheme.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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Florian Tobias Schandinat authored and Florian Tobias Schandinat committed Sep 24, 2010
1 parent b002741 commit a54be17
Showing 1 changed file with 94 additions and 89 deletions.
183 changes: 94 additions & 89 deletions drivers/video/via/hw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -860,18 +860,78 @@ void viafb_set_output_path(int device, int set_iga, int output_interface)
enable_second_display_channel();
}

static void set_crt_output_path(int set_iga)
static void set_source_common(u8 index, u8 offset, u8 iga)
{
viafb_write_reg_mask(CR36, VIACR, 0x00, BIT4 + BIT5);
u8 value, mask = 1 << offset;

switch (set_iga) {
switch (iga) {
case IGA1:
value = 0x00;
break;
case IGA2:
value = mask;
break;
default:
printk(KERN_WARNING "viafb: Unsupported source: %d\n", iga);
return;
}

via_write_reg_mask(VIACR, index, value, mask);
}

static void set_crt_source(u8 iga)
{
u8 value;

switch (iga) {
case IGA1:
viafb_write_reg_mask(SR16, VIASR, 0x00, BIT6);
value = 0x00;
break;
case IGA2:
viafb_write_reg_mask(SR16, VIASR, 0x40, BIT6);
value = 0x40;
break;
default:
printk(KERN_WARNING "viafb: Unsupported source: %d\n", iga);
return;
}

via_write_reg_mask(VIASR, 0x16, value, 0x40);
}

static inline void set_6C_source(u8 iga)
{
set_source_common(0x6C, 7, iga);
}

static inline void set_93_source(u8 iga)
{
set_source_common(0x93, 7, iga);
}

static inline void set_96_source(u8 iga)
{
set_source_common(0x96, 4, iga);
}

static inline void set_dvp1_source(u8 iga)
{
set_source_common(0x9B, 4, iga);
}

static inline void set_lvds1_source(u8 iga)
{
set_source_common(0x99, 4, iga);
}

static inline void set_lvds2_source(u8 iga)
{
set_source_common(0x97, 4, iga);
}

static void set_crt_output_path(int set_iga)
{
viafb_write_reg_mask(CR36, VIACR, 0x00, BIT4 + BIT5);
set_crt_source(set_iga);
}

static void dvi_patch_skew_dvp0(void)
Expand Down Expand Up @@ -944,76 +1004,45 @@ static void set_dvi_output_path(int set_iga, int output_interface)
{
switch (output_interface) {
case INTERFACE_DVP0:
set_96_source(set_iga);
set_6C_source(set_iga);
viafb_write_reg_mask(CR6B, VIACR, 0x01, BIT0);

if (set_iga == IGA1) {
viafb_write_reg_mask(CR96, VIACR, 0x00, BIT4);
viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 +
BIT5 + BIT7);
} else {
viafb_write_reg_mask(CR96, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR6C, VIACR, 0xA1, BIT0 +
BIT5 + BIT7);
}

viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 + BIT5);
viafb_write_reg_mask(SR1E, VIASR, 0xC0, BIT7 + BIT6);

dvi_patch_skew_dvp0();
break;

case INTERFACE_DVP1:
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
if (set_iga == IGA1)
viafb_write_reg_mask(CR93, VIACR, 0x21,
BIT0 + BIT5 + BIT7);
else
viafb_write_reg_mask(CR93, VIACR, 0xA1,
BIT0 + BIT5 + BIT7);
set_93_source(set_iga);
viafb_write_reg_mask(CR93, VIACR, 0x21, BIT0 + BIT5);
} else {
if (set_iga == IGA1)
viafb_write_reg_mask(CR9B, VIACR, 0x00, BIT4);
else
viafb_write_reg_mask(CR9B, VIACR, 0x10, BIT4);
set_dvp1_source(set_iga);
}

viafb_write_reg_mask(SR1E, VIASR, 0x30, BIT4 + BIT5);
break;
case INTERFACE_DFP_HIGH:
if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266) {
if (set_iga == IGA1) {
viafb_write_reg_mask(CR96, VIACR, 0x00, BIT4);
viafb_write_reg_mask(CR97, VIACR, 0x03,
BIT0 + BIT1 + BIT4);
} else {
viafb_write_reg_mask(CR96, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR97, VIACR, 0x13,
BIT0 + BIT1 + BIT4);
}
via_write_reg_mask(VIACR, CR97, 0x03, 0x03);
set_lvds2_source(set_iga);
set_96_source(set_iga);
}

viafb_write_reg_mask(SR2A, VIASR, 0x0C, BIT2 + BIT3);
break;

case INTERFACE_DFP_LOW:
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
break;

if (set_iga == IGA1) {
viafb_write_reg_mask(CR99, VIACR, 0x00, BIT4);
viafb_write_reg_mask(CR9B, VIACR, 0x00, BIT4);
} else {
viafb_write_reg_mask(CR99, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR9B, VIACR, 0x10, BIT4);
}

set_dvp1_source(set_iga);
set_lvds1_source(set_iga);
viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
dvi_patch_skew_dvp_low();
break;

case INTERFACE_TMDS:
if (set_iga == IGA1)
viafb_write_reg_mask(CR99, VIACR, 0x00, BIT4);
else
viafb_write_reg_mask(CR99, VIACR, 0x10, BIT4);
set_lvds1_source(set_iga);
break;
}

Expand All @@ -1031,45 +1060,31 @@ static void set_lcd_output_path(int set_iga, int output_interface)

viafb_write_reg_mask(CR6B, VIACR, 0x00, BIT3);
viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);

switch (output_interface) {
case INTERFACE_DVP0:
if (set_iga == IGA1) {
viafb_write_reg_mask(CR96, VIACR, 0x00, BIT4);
} else {
set_96_source(set_iga);
if (set_iga == IGA2)
viafb_write_reg(CR91, VIACR, 0x00);
viafb_write_reg_mask(CR96, VIACR, 0x10, BIT4);
}
break;

case INTERFACE_DVP1:
if (set_iga == IGA1)
viafb_write_reg_mask(CR9B, VIACR, 0x00, BIT4);
else {
set_dvp1_source(set_iga);
if (set_iga == IGA2)
viafb_write_reg(CR91, VIACR, 0x00);
viafb_write_reg_mask(CR9B, VIACR, 0x10, BIT4);
}
break;

case INTERFACE_DFP_HIGH:
if (set_iga == IGA1)
viafb_write_reg_mask(CR97, VIACR, 0x00, BIT4);
else {
set_lvds2_source(set_iga);
set_96_source(set_iga);
if (set_iga == IGA2)
viafb_write_reg(CR91, VIACR, 0x00);
viafb_write_reg_mask(CR97, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR96, VIACR, 0x10, BIT4);
}
break;

case INTERFACE_DFP_LOW:
if (set_iga == IGA1)
viafb_write_reg_mask(CR99, VIACR, 0x00, BIT4);
else {
set_lvds1_source(set_iga);
set_dvp1_source(set_iga);
if (set_iga == IGA2)
viafb_write_reg(CR91, VIACR, 0x00);
viafb_write_reg_mask(CR99, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR9B, VIACR, 0x10, BIT4);
}

break;

case INTERFACE_DFP:
Expand All @@ -1078,30 +1093,20 @@ static void set_lcd_output_path(int set_iga, int output_interface)
viaparinfo->chip_info->gfx_chip_name))
viafb_write_reg_mask(CR97, VIACR, 0x84,
BIT7 + BIT2 + BIT1 + BIT0);
if (set_iga == IGA1) {
viafb_write_reg_mask(CR97, VIACR, 0x00, BIT4);
viafb_write_reg_mask(CR99, VIACR, 0x00, BIT4);
} else {

set_lvds1_source(set_iga);
set_lvds2_source(set_iga);
if (set_iga == IGA2)
viafb_write_reg(CR91, VIACR, 0x00);
viafb_write_reg_mask(CR97, VIACR, 0x10, BIT4);
viafb_write_reg_mask(CR99, VIACR, 0x10, BIT4);
}
break;

case INTERFACE_LVDS0:
case INTERFACE_LVDS0LVDS1:
if (set_iga == IGA1)
viafb_write_reg_mask(CR99, VIACR, 0x00, BIT4);
else
viafb_write_reg_mask(CR99, VIACR, 0x10, BIT4);

set_lvds1_source(set_iga);
break;

case INTERFACE_LVDS1:
if (set_iga == IGA1)
viafb_write_reg_mask(CR97, VIACR, 0x00, BIT4);
else
viafb_write_reg_mask(CR97, VIACR, 0x10, BIT4);
set_lvds2_source(set_iga);
break;
}
}
Expand Down

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