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path: root/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_legacy_encoders.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_legacy_encoders.c65
1 files changed, 41 insertions, 24 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 757b08f07195..92487e614778 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -271,13 +271,6 @@ static const struct drm_encoder_helper_funcs radeon_legacy_lvds_helper_funcs = {
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-#define MAX_RADEON_LEVEL 0xFF
-
-struct radeon_backlight_privdata {
- struct radeon_encoder *encoder;
- uint8_t negative;
-};
-
static uint8_t radeon_legacy_lvds_level(struct backlight_device *bd)
{
struct radeon_backlight_privdata *pdata = bl_get_data(bd);
@@ -286,21 +279,33 @@ static uint8_t radeon_legacy_lvds_level(struct backlight_device *bd)
/* Convert brightness to hardware level */
if (bd->props.brightness < 0)
level = 0;
- else if (bd->props.brightness > MAX_RADEON_LEVEL)
- level = MAX_RADEON_LEVEL;
+ else if (bd->props.brightness > RADEON_MAX_BL_LEVEL)
+ level = RADEON_MAX_BL_LEVEL;
else
level = bd->props.brightness;
if (pdata->negative)
- level = MAX_RADEON_LEVEL - level;
+ level = RADEON_MAX_BL_LEVEL - level;
return level;
}
-static int radeon_legacy_backlight_update_status(struct backlight_device *bd)
+u8
+radeon_legacy_get_backlight_level(struct radeon_encoder *radeon_encoder)
+{
+ struct drm_device *dev = radeon_encoder->base.dev;
+ struct radeon_device *rdev = dev->dev_private;
+ u8 backlight_level;
+
+ backlight_level = (RREG32(RADEON_LVDS_GEN_CNTL) >>
+ RADEON_LVDS_BL_MOD_LEVEL_SHIFT) & 0xff;
+
+ return backlight_level;
+}
+
+void
+radeon_legacy_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level)
{
- struct radeon_backlight_privdata *pdata = bl_get_data(bd);
- struct radeon_encoder *radeon_encoder = pdata->encoder;
struct drm_device *dev = radeon_encoder->base.dev;
struct radeon_device *rdev = dev->dev_private;
int dpms_mode = DRM_MODE_DPMS_ON;
@@ -308,19 +313,31 @@ static int radeon_legacy_backlight_update_status(struct backlight_device *bd)
if (radeon_encoder->enc_priv) {
if (rdev->is_atom_bios) {
struct radeon_encoder_atom_dig *lvds = radeon_encoder->enc_priv;
- dpms_mode = lvds->dpms_mode;
- lvds->backlight_level = radeon_legacy_lvds_level(bd);
+ if (lvds->backlight_level > 0)
+ dpms_mode = lvds->dpms_mode;
+ else
+ dpms_mode = DRM_MODE_DPMS_OFF;
+ lvds->backlight_level = level;
} else {
struct radeon_encoder_lvds *lvds = radeon_encoder->enc_priv;
- dpms_mode = lvds->dpms_mode;
- lvds->backlight_level = radeon_legacy_lvds_level(bd);
+ if (lvds->backlight_level > 0)
+ dpms_mode = lvds->dpms_mode;
+ else
+ dpms_mode = DRM_MODE_DPMS_OFF;
+ lvds->backlight_level = level;
}
}
- if (bd->props.brightness > 0)
- radeon_legacy_lvds_update(&radeon_encoder->base, dpms_mode);
- else
- radeon_legacy_lvds_update(&radeon_encoder->base, DRM_MODE_DPMS_OFF);
+ radeon_legacy_lvds_update(&radeon_encoder->base, dpms_mode);
+}
+
+static int radeon_legacy_backlight_update_status(struct backlight_device *bd)
+{
+ struct radeon_backlight_privdata *pdata = bl_get_data(bd);
+ struct radeon_encoder *radeon_encoder = pdata->encoder;
+
+ radeon_legacy_set_backlight_level(radeon_encoder,
+ radeon_legacy_lvds_level(bd));
return 0;
}
@@ -336,7 +353,7 @@ static int radeon_legacy_backlight_get_brightness(struct backlight_device *bd)
backlight_level = (RREG32(RADEON_LVDS_GEN_CNTL) >>
RADEON_LVDS_BL_MOD_LEVEL_SHIFT) & 0xff;
- return pdata->negative ? MAX_RADEON_LEVEL - backlight_level : backlight_level;
+ return pdata->negative ? RADEON_MAX_BL_LEVEL - backlight_level : backlight_level;
}
static const struct backlight_ops radeon_backlight_ops = {
@@ -370,7 +387,7 @@ void radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder,
}
memset(&props, 0, sizeof(props));
- props.max_brightness = MAX_RADEON_LEVEL;
+ props.max_brightness = RADEON_MAX_BL_LEVEL;
props.type = BACKLIGHT_RAW;
bd = backlight_device_register("radeon_bl", &drm_connector->kdev,
pdata, &radeon_backlight_ops, &props);
@@ -449,7 +466,7 @@ static void radeon_legacy_backlight_exit(struct radeon_encoder *radeon_encoder)
}
if (bd) {
- struct radeon_legacy_backlight_privdata *pdata;
+ struct radeon_backlight_privdata *pdata;
pdata = bl_get_data(bd);
backlight_device_unregister(bd);