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From: Jonathan Corbet on 18 Apr 2010 14:30
From: Chris Ball <cjb(a)laptop.org>

The i2c transactions involved in detecting LVDS (9 seconds) and TMDS
(16 seconds) add an extra 25 seconds to viafb load time on the XO-1.5.

[jc: minor merge conflict fixed, removed ifdefs]
Signed-off-by: Chris Ball <cjb(a)laptop.org>
---
drivers/video/via/hw.c | 7 +++++++
drivers/video/via/lcd.c | 7 +++++++
2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index 4aff0f7..bd5d5ce 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -2037,6 +2037,13 @@ static void init_gfx_chip_info(struct pci_dev *pdev,

static void init_tmds_chip_info(void)
{
+ /*
+ * OLPC XO 1.5 systems are wired differently, so there is
+ * no point in them here.
+ */
+ if (machine_is_olpc())
+ return;
+
viafb_tmds_trasmitter_identify();

if (INTERFACE_NONE == viaparinfo->chip_info->tmds_chip_info.
diff --git a/drivers/video/via/lcd.c b/drivers/video/via/lcd.c
index b656e59..ce3f4b6 100644
--- a/drivers/video/via/lcd.c
+++ b/drivers/video/via/lcd.c
@@ -173,6 +173,13 @@ static bool lvds_identify_integratedlvds(void)

int viafb_lvds_trasmitter_identify(void)
{
+ /*
+ * OLPC XO 1.5 systems are wired differently, so there is
+ * no point in them here.
+ */
+ if (machine_is_olpc())
+ return FAIL;
+
viaparinfo->shared->i2c_stuff.i2c_port = I2CPORTINDEX;
if (viafb_lvds_identify_vt1636()) {
viaparinfo->chip_info->lvds_chip_info.i2c_port = I2CPORTINDEX;
--
1.7.0.1

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Prev: [PATCH 06/11] viafb: Determine type of 2D engine and store it in chip_info
Next: Urgent Notice!!!