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drm/radeon: add backlight control for atom devices (v2)

Browse Source 
On systems that use the build in GPU backlight controller,
we can use atom tables to change the brightness level.

v2: use firmware flags

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2012-07-26 11:32:03 -04:00
parent 910308802c
commit f3728734ba
3 changed files with 248 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/radeon/radeon_encoders.c
+17 -1
View File
@@ -29,6 +29,14 @@
#include "radeon.h"
#include "atom.h"
extern void
radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder,
struct drm_connector *drm_connector);
extern void
radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder,
struct drm_connector *drm_connector);
static uint32_t radeon_encoder_clones(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
@@ -153,6 +161,7 @@ radeon_get_encoder_enum(struct drm_device *dev, uint32_t supported_device, uint8
void
radeon_link_encoder_connector(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
struct drm_connector *connector;
struct radeon_connector *radeon_connector;
struct drm_encoder *encoder;
@@ -163,8 +172,15 @@ radeon_link_encoder_connector(struct drm_device *dev)
radeon_connector = to_radeon_connector(connector);
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
radeon_encoder = to_radeon_encoder(encoder);
if (radeon_encoder->devices & radeon_connector->devices)
if (radeon_encoder->devices & radeon_connector->devices) {
drm_mode_connector_attach_encoder(connector, encoder);
if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
if (rdev->is_atom_bios)
radeon_atom_backlight_init(radeon_encoder, connector);
else
radeon_legacy_backlight_init(radeon_encoder, connector);
}
}
}
}
}