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drm/radeon: rework legacy backlight control 

To better enable sharing with atom backlight control.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-07-26 11:05:22 -04:00
parent af7912e573
commit 910308802c
2 changed files with 17 additions and 13 deletions
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19
drivers/gpu/drm/radeon/radeon_legacy_encoders.c
View File

@ -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);
@ -286,13 +279,13 @@ 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;
}
@ -336,7 +329,7 @@ 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 +363,7 @@ 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 +442,7 @@ 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);

11
drivers/gpu/drm/radeon/radeon_mode.h
View File

@ -256,6 +256,17 @@ struct radeon_mode_info {
u16 firmware_flags;
};
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
#define RADEON_MAX_BL_LEVEL 0xFF
struct radeon_backlight_privdata {
struct radeon_encoder *encoder;
uint8_t negative;
};
#endif
#define MAX_H_CODE_TIMING_LEN 32
#define MAX_V_CODE_TIMING_LEN 32