From 261a3ad42605f5824072d1410d3c5f7b93f7cad8 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 4 Sep 2014 17:50:17 +1000 Subject: drm/ast: Properly initialize P2A base before using it in ast_init_3rdtx() If the P2A has been used to target other SOC registers before that call, we're going to hit the wrong place so make sure we set the base address up properly before using it. (P2A stands for PCIe to AHB bridge and is the bride that allows accessing the AST's internal AHB bus using a relocatable 64k window in the second half of the PCIe MMIO BAR) Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Dave Airlie --- drivers/gpu/drm/ast/ast_dp501.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/gpu/drm/ast/ast_dp501.c') diff --git a/drivers/gpu/drm/ast/ast_dp501.c b/drivers/gpu/drm/ast/ast_dp501.c index 5da4b62285fa..7e2ddde474e3 100644 --- a/drivers/gpu/drm/ast/ast_dp501.c +++ b/drivers/gpu/drm/ast/ast_dp501.c @@ -400,7 +400,18 @@ void ast_init_3rdtx(struct drm_device *dev) 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); -- cgit v1.2.3-70-g09d2 From 37b9b81f3074ce35fadf64d321b79292494220d1 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 4 Sep 2014 17:45:26 +1000 Subject: drm/ast: Cleanup analog init code path Move the MMIO mangling to a separate routine and actually disable the DVO output when using pure analog. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Dave Airlie --- drivers/gpu/drm/ast/ast_dp501.c | 49 ++++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 18 deletions(-) (limited to 'drivers/gpu/drm/ast/ast_dp501.c') diff --git a/drivers/gpu/drm/ast/ast_dp501.c b/drivers/gpu/drm/ast/ast_dp501.c index 7e2ddde474e3..76f07f38b941 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) { @@ -399,23 +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); } } } -- cgit v1.2.3-70-g09d2