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drm/nouveau/i2c/anx9805: add debugging to aux transactions 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-06-11 10:28:18 +10:00
parent 9efc583ea9
commit 37da5b87ac
2 changed files with 34 additions and 5 deletions
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24
drivers/gpu/drm/nouveau/core/subdev/i2c/anx9805.c
View File

@ -22,7 +22,7 @@
* Authors: Ben Skeggs <bskeggs@redhat.com>
*/
#include "priv.h"
#include "port.h"
struct anx9805_i2c_port {
struct nouveau_i2c_port base;
@ -37,6 +37,8 @@ anx9805_train(struct nouveau_i2c_port *port, int link_nr, int link_bw, bool enh)
struct nouveau_i2c_port *mast = (void *)nv_object(chan)->parent;
u8 tmp, i;
DBG("ANX9805 train %d 0x%02x %d\n", link_nr, link_bw, enh);
nv_wri2cr(mast, chan->addr, 0xa0, link_bw);
nv_wri2cr(mast, chan->addr, 0xa1, link_nr | (enh ? 0x80 : 0x00));
nv_wri2cr(mast, chan->addr, 0xa2, 0x01);
@ -66,16 +68,23 @@ anx9805_aux(struct nouveau_i2c_port *port, bool retry,
struct anx9805_i2c_port *chan = (void *)port;
struct nouveau_i2c_port *mast = (void *)nv_object(chan)->parent;
int i, ret = -ETIMEDOUT;
u8 buf[16] = {};
u8 tmp;
DBG("%02x %05x %d\n", type, addr, size);
tmp = nv_rdi2cr(mast, chan->ctrl, 0x07) & ~0x04;
nv_wri2cr(mast, chan->ctrl, 0x07, tmp | 0x04);
nv_wri2cr(mast, chan->ctrl, 0x07, tmp);
nv_wri2cr(mast, chan->ctrl, 0xf7, 0x01);
nv_wri2cr(mast, chan->addr, 0xe4, 0x80);
for (i = 0; !(type & 1) && i < size; i++)
nv_wri2cr(mast, chan->addr, 0xf0 + i, data[i]);
if (!(type & 1)) {
memcpy(buf, data, size);
DBG("%16ph", buf);
for (i = 0; i < size; i++)
nv_wri2cr(mast, chan->addr, 0xf0 + i, buf[i]);
}
nv_wri2cr(mast, chan->addr, 0xe5, ((size - 1) << 4) | type);
nv_wri2cr(mast, chan->addr, 0xe6, (addr & 0x000ff) >> 0);
nv_wri2cr(mast, chan->addr, 0xe7, (addr & 0x0ff00) >> 8);
@ -94,8 +103,13 @@ anx9805_aux(struct nouveau_i2c_port *port, bool retry,
goto done;
}
for (i = 0; (type & 1) && i < size; i++)
data[i] = nv_rdi2cr(mast, chan->addr, 0xf0 + i);
if (type & 1) {
for (i = 0; i < size; i++)
buf[i] = nv_rdi2cr(mast, chan->addr, 0xf0 + i);
DBG("%16ph", buf);
memcpy(data, buf, size);
}
ret = 0;
done:
nv_wri2cr(mast, chan->ctrl, 0xf7, 0x01);

15
drivers/gpu/drm/nouveau/core/subdev/i2c/port.h Normal file
View File

@ -0,0 +1,15 @@
#ifndef __NVKM_I2C_PORT_H__
#define __NVKM_I2C_PORT_H__
#include "priv.h"
#ifndef MSG
#define MSG(l,f,a...) do { \
struct nouveau_i2c_port *_port = (void *)port; \
nv_##l(nv_object(_port)->engine, "PORT:%02x: "f, _port->index, ##a); \
} while(0)
#define DBG(f,a...) MSG(debug, f, ##a)
#define ERR(f,a...) MSG(error, f, ##a)
#endif
#endif