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drm/nouveau/temp: Fix signed/unsigned int logic

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Many (all?) of the coefficients related to calculating the
correct temperature are signed integers

This patch correcly parses and stores those values
It also ensures that the default offset is 0 (previously 1)

Affected cards - the original nv50 and the nv40 family

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Emil Velikov 2011-06-22 02:13:23 +01:00 committed by Ben Skeggs
parent 0b33c93659
commit 40ce4279e1
2 changed files with 7 additions and 7 deletions
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6
drivers/gpu/drm/nouveau/nouveau_drv.h
View file

@ -461,9 +461,9 @@ struct nouveau_pm_level {
struct nouveau_pm_temp_sensor_constants {
u16 offset_constant;
s16 offset_mult;
u16 offset_div;
u16 slope_mult;
u16 slope_div;
s16 offset_div;
s16 slope_mult;
s16 slope_div;
};
struct nouveau_pm_threshold_temp {

8
drivers/gpu/drm/nouveau/nouveau_temp.c
View file

@ -43,7 +43,7 @@ nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
/* Set the default sensor's contants */
sensor->offset_constant = 0;
sensor->offset_mult = 1;
sensor->offset_mult = 0;
sensor->offset_div = 1;
sensor->slope_mult = 1;
sensor->slope_div = 1;
@ -109,7 +109,7 @@ nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
/* Read the entries from the table */
for (i = 0; i < entries; i++) {
u16 value = ROM16(temp[1]);
s16 value = ROM16(temp[1]);
switch (temp[0]) {
case 0x01:
@ -160,8 +160,8 @@ nv40_sensor_setup(struct drm_device *dev)
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
u32 offset = sensor->offset_mult / sensor->offset_div;
u32 sensor_calibration;
s32 offset = sensor->offset_mult / sensor->offset_div;
s32 sensor_calibration;
/* set up the sensors */
sensor_calibration = 120 - offset - sensor->offset_constant;