summaryrefslogtreecommitdiffstats
path: root/drivers/video/aty/radeon_i2c.c
diff options
context:
space:
mode:
authorDennis Munsie <dmunsie@cecropia.com>2006-10-03 01:14:46 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:10 -0700
commit7a45093b7caa9d3d5421274b4ba80fba5da17e19 (patch)
tree33b08dd767325bb1ee82840a1b3c0232bc275d8d /drivers/video/aty/radeon_i2c.c
parent946c4eab86cc67dac6021b56f45495f59b3970b4 (diff)
downloadlinux-7a45093b7caa9d3d5421274b4ba80fba5da17e19.tar.bz2
[PATCH] radeonfb: Use generic DDC reading
Uses the generic ddc read functionality in fbmon.c instead of the previous functionality. Signed-off-by: Dennis Munsie <dmunsie@cecropia.com> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/aty/radeon_i2c.c')
-rw-r--r--drivers/video/aty/radeon_i2c.c106
1 files changed, 3 insertions, 103 deletions
diff --git a/drivers/video/aty/radeon_i2c.c b/drivers/video/aty/radeon_i2c.c
index 9aaca58c074a..676754520099 100644
--- a/drivers/video/aty/radeon_i2c.c
+++ b/drivers/video/aty/radeon_i2c.c
@@ -16,8 +16,6 @@
#include "radeonfb.h"
#include "../edid.h"
-#define RADEON_DDC 0x50
-
static void radeon_gpio_setscl(void* data, int state)
{
struct radeon_i2c_chan *chan = data;
@@ -138,108 +136,10 @@ void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
rinfo->i2c[3].rinfo = NULL;
}
-
-static u8 *radeon_do_probe_i2c_edid(struct radeon_i2c_chan *chan)
-{
- u8 start = 0x0;
- struct i2c_msg msgs[] = {
- {
- .addr = RADEON_DDC,
- .len = 1,
- .buf = &start,
- }, {
- .addr = RADEON_DDC,
- .flags = I2C_M_RD,
- .len = EDID_LENGTH,
- },
- };
- u8 *buf;
-
- buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
- if (!buf) {
- dev_warn(&chan->rinfo->pdev->dev, "Out of memory!\n");
- return NULL;
- }
- msgs[1].buf = buf;
-
- if (i2c_transfer(&chan->adapter, msgs, 2) == 2)
- return buf;
- dev_dbg(&chan->rinfo->pdev->dev, "Unable to read EDID block.\n");
- kfree(buf);
- return NULL;
-}
-
-
-int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn, u8 **out_edid)
+int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
+ u8 **out_edid)
{
- u32 reg = rinfo->i2c[conn-1].ddc_reg;
- u8 *edid = NULL;
- int i, j;
-
- OUTREG(reg, INREG(reg) &
- ~(VGA_DDC_DATA_OUTPUT | VGA_DDC_CLK_OUTPUT));
-
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
- (void)INREG(reg);
-
- for (i = 0; i < 3; i++) {
- /* For some old monitors we need the
- * following process to initialize/stop DDC
- */
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
- (void)INREG(reg);
- msleep(13);
-
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
- (void)INREG(reg);
- for (j = 0; j < 5; j++) {
- msleep(10);
- if (INREG(reg) & VGA_DDC_CLK_INPUT)
- break;
- }
- if (j == 5)
- continue;
-
- OUTREG(reg, INREG(reg) | VGA_DDC_DATA_OUT_EN);
- (void)INREG(reg);
- msleep(15);
- OUTREG(reg, INREG(reg) | VGA_DDC_CLK_OUT_EN);
- (void)INREG(reg);
- msleep(15);
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
- (void)INREG(reg);
- msleep(15);
-
- /* Do the real work */
- edid = radeon_do_probe_i2c_edid(&rinfo->i2c[conn-1]);
-
- OUTREG(reg, INREG(reg) |
- (VGA_DDC_DATA_OUT_EN | VGA_DDC_CLK_OUT_EN));
- (void)INREG(reg);
- msleep(15);
-
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN));
- (void)INREG(reg);
- for (j = 0; j < 10; j++) {
- msleep(10);
- if (INREG(reg) & VGA_DDC_CLK_INPUT)
- break;
- }
-
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_DATA_OUT_EN));
- (void)INREG(reg);
- msleep(15);
- OUTREG(reg, INREG(reg) |
- (VGA_DDC_DATA_OUT_EN | VGA_DDC_CLK_OUT_EN));
- (void)INREG(reg);
- if (edid)
- break;
- }
- /* Release the DDC lines when done or the Apple Cinema HD display
- * will switch off
- */
- OUTREG(reg, INREG(reg) & ~(VGA_DDC_CLK_OUT_EN | VGA_DDC_DATA_OUT_EN));
- (void)INREG(reg);
+ u8 *edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
if (out_edid)
*out_edid = edid;