diff options
Diffstat (limited to 'drivers/gpu/drm/ast/ast_dp501.c')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_dp501.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/drivers/gpu/drm/ast/ast_dp501.c b/drivers/gpu/drm/ast/ast_dp501.c index 5da4b62285f..76f07f38b94 100644 --- a/drivers/gpu/drm/ast/ast_dp501.c +++ b/drivers/gpu/drm/ast/ast_dp501.c @@ -379,11 +379,39 @@ static bool ast_init_dvo(struct drm_device *dev) return true; } + +static void ast_init_analog(struct drm_device *dev) +{ + struct ast_private *ast = dev->dev_private; + u32 data; + + /* + * Set DAC source to VGA mode in SCU2C via the P2A + * bridge. First configure the P2U to target the SCU + * in case it isn't at this stage. + */ + ast_write32(ast, 0xf004, 0x1e6e0000); + ast_write32(ast, 0xf000, 0x1); + + /* Then unlock the SCU with the magic password */ + ast_write32(ast, 0x12000, 0x1688a8a8); + ast_write32(ast, 0x12000, 0x1688a8a8); + ast_write32(ast, 0x12000, 0x1688a8a8); + + /* Finally, clear bits [17:16] of SCU2c */ + data = ast_read32(ast, 0x1202c); + data &= 0xfffcffff; + ast_write32(ast, 0, data); + + /* Disable DVO */ + ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x00); +} + void ast_init_3rdtx(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; u8 jreg; - u32 data; + if (ast->chip == AST2300 || ast->chip == AST2400) { jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); switch (jreg & 0x0e) { @@ -399,12 +427,8 @@ void ast_init_3rdtx(struct drm_device *dev) default: if (ast->tx_chip_type == AST_TX_SIL164) ast_init_dvo(dev); - else { - ast_write32(ast, 0x12000, 0x1688a8a8); - data = ast_read32(ast, 0x1202c); - data &= 0xfffcffff; - ast_write32(ast, 0, data); - } + else + ast_init_analog(dev); } } } |