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drm/ast: Cleanup analog init code path

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Move the MMIO mangling to a separate routine and actually
disable the DVO output when using pure analog.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Benjamin Herrenschmidt 2014-09-04 17:45:26 +10:00 committed by Dave Airlie
parent 42fb142744
commit 37b9b81f30
1 changed files with 31 additions and 18 deletions
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49
drivers/gpu/drm/ast/ast_dp501.c
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@ -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) {
@ -399,23 +427,8 @@ void ast_init_3rdtx(struct drm_device *dev)
default:
if (ast->tx_chip_type == AST_TX_SIL164)
ast_init_dvo(dev);
else {
/*
* 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);
}
else
ast_init_analog(dev);
}
}
}