drm/radeon: rework the backlight control to be an asic callback

This cleans up the interface a bit as well.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

7 files changed, 84 insertions, 33 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 370b2c4a7c86..f9910f099e6e 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -73,7 +73,7 @@ radeon_atom_set_backlight_level_to_reg(struct radeon_device *rdev,
 }
 
 void
-atombios_set_panel_brightness(struct radeon_encoder *radeon_encoder)
+atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level)
 {
         struct drm_encoder *encoder = &radeon_encoder->base;
         struct drm_device *dev = radeon_encoder->base.dev;
@@ -82,8 +82,13 @@ atombios_set_panel_brightness(struct radeon_encoder *radeon_encoder)
         DISPLAY_DEVICE_OUTPUT_CONTROL_PS_ALLOCATION args;
         int index;
 
-        if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
+        if (!(rdev->mode_info.firmware_flags & ATOM_BIOS_INFO_BL_CONTROLLED_BY_GPU))
+                return;
+
+        if ((radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
+            radeon_encoder->enc_priv) {
                 dig = radeon_encoder->enc_priv;
+                dig->backlight_level = level;
                 radeon_atom_set_backlight_level_to_reg(rdev, dig->backlight_level);
 
                 switch (radeon_encoder->encoder_id) {
@@ -137,11 +142,7 @@ static int radeon_atom_backlight_update_status(struct backlight_device *bd)
         struct radeon_backlight_privdata *pdata = bl_get_data(bd);
         struct radeon_encoder *radeon_encoder = pdata->encoder;
 
-        if (radeon_encoder->enc_priv) {
-                struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
-                dig->backlight_level = radeon_atom_bl_level(bd);
-                atombios_set_panel_brightness(radeon_encoder);
-        }
+        atombios_set_backlight_level(radeon_encoder, radeon_atom_bl_level(bd));
 
         return 0;
 }
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 99a5c8445014..a1c4d4dac7df 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1153,6 +1153,8 @@ struct radeon_asic {
                 u32 (*get_vblank_counter)(struct radeon_device *rdev, int crtc);
                 /* wait for vblank */
                 void (*wait_for_vblank)(struct radeon_device *rdev, int crtc);
+                /* set backlight level */
+                void (*set_backlight_level)(struct radeon_encoder *radeon_encoder, u8 level);
         } display;
         /* copy functions for bo handling */
         struct {
@@ -1461,7 +1463,7 @@ struct radeon_atif {
         struct radeon_atif_notifications notifications;
         struct radeon_atif_functions functions;
         struct radeon_atif_notification_cfg notification_cfg;
-        struct radeon_encoder *backlight_ctl;
+        struct radeon_encoder *encoder_for_bl;
 };
 
 struct radeon_atcs_functions {
@@ -1741,6 +1743,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
 #define radeon_irq_set(rdev) (rdev)->asic->irq.set((rdev))
 #define radeon_irq_process(rdev) (rdev)->asic->irq.process((rdev))
 #define radeon_get_vblank_counter(rdev, crtc) (rdev)->asic->display.get_vblank_counter((rdev), (crtc))
+#define radeon_set_backlight_level(rdev, e, l) (rdev)->asic->display.set_backlight_level((e), (l))
 #define radeon_fence_ring_emit(rdev, r, fence) (rdev)->asic->ring[(r)].emit_fence((rdev), (fence))
 #define radeon_semaphore_ring_emit(rdev, r, cp, semaphore, emit_wait) (rdev)->asic->ring[(r)].emit_semaphore((rdev), (cp), (semaphore), (emit_wait))
 #define radeon_copy_blit(rdev, s, d, np, f) (rdev)->asic->copy.blit((rdev), (s), (d), (np), (f))
diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c
index cae895ba8e2f..c3976eb341bf 100644
--- a/drivers/gpu/drm/radeon/radeon_acpi.c
+++ b/drivers/gpu/drm/radeon/radeon_acpi.c
@@ -364,19 +364,23 @@ int radeon_atif_handler(struct radeon_device *rdev,
         DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
 
         if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
-                struct radeon_encoder *enc = atif->backlight_ctl;
+                struct radeon_encoder *enc = atif->encoder_for_bl;
 
                 if (enc) {
-                        struct radeon_encoder_atom_dig *dig = enc->enc_priv;
-                        dig->backlight_level = req.backlight_level;
-
                         DRM_DEBUG_DRIVER("Changing brightness to %d\n",
                                         req.backlight_level);
 
-                        atombios_set_panel_brightness(enc);
+                        radeon_set_backlight_level(rdev, enc, req.backlight_level);
 
-                        backlight_force_update(dig->bl_dev,
-                                        BACKLIGHT_UPDATE_HOTKEY);
+                        if (rdev->is_atom_bios) {
+                                struct radeon_encoder_atom_dig *dig = enc->enc_priv;
+                                backlight_force_update(dig->bl_dev,
+                                                       BACKLIGHT_UPDATE_HOTKEY);
+                        } else {
+                                struct radeon_encoder_lvds *dig = enc->enc_priv;
+                                backlight_force_update(dig->bl_dev,
+                                                       BACKLIGHT_UPDATE_HOTKEY);
+                        }
                 }
         }
         /* TODO: check other events */
@@ -577,16 +581,26 @@ int radeon_acpi_init(struct radeon_device *rdev)
                 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list,
                                 head) {
                         struct radeon_encoder *enc = to_radeon_encoder(tmp);
-                        struct radeon_encoder_atom_dig *dig = enc->enc_priv;
 
                         if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
-                                        dig->bl_dev != NULL) {
-                                target = enc;
-                                break;
+                            enc->enc_priv) {
+                                if (rdev->is_atom_bios) {
+                                        struct radeon_encoder_atom_dig *dig = enc->enc_priv;
+                                        if (dig->bl_dev) {
+                                                target = enc;
+                                                break;
+                                        }
+                                } else {
+                                        struct radeon_encoder_lvds *dig = enc->enc_priv;
+                                        if (dig->bl_dev) {
+                                                target = enc;
+                                                break;
+                                        }
+                                }
                         }
                 }
 
-                atif->backlight_ctl = target;
+                atif->encoder_for_bl = target;
                 if (!target) {
                         /* Brightness change notification is enabled, but we
                          * didn't find a backlight controller, this should
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 973417c4b014..29834a2be3ea 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -198,6 +198,7 @@ static struct radeon_asic r100_asic = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &radeon_legacy_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -272,6 +273,7 @@ static struct radeon_asic r200_asic = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &radeon_legacy_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -346,6 +348,7 @@ static struct radeon_asic r300_asic = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &radeon_legacy_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -420,6 +423,7 @@ static struct radeon_asic r300_asic_pcie = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &radeon_legacy_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -494,6 +498,7 @@ static struct radeon_asic r420_asic = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -568,6 +573,7 @@ static struct radeon_asic rs400_asic = {
                 .bandwidth_update = &r100_bandwidth_update,
                 .get_vblank_counter = &r100_get_vblank_counter,
                 .wait_for_vblank = &r100_wait_for_vblank,
+                .set_backlight_level = &radeon_legacy_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -642,6 +648,7 @@ static struct radeon_asic rs600_asic = {
                 .bandwidth_update = &rs600_bandwidth_update,
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -716,6 +723,7 @@ static struct radeon_asic rs690_asic = {
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .bandwidth_update = &rs690_bandwidth_update,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -790,6 +798,7 @@ static struct radeon_asic rv515_asic = {
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .bandwidth_update = &rv515_bandwidth_update,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -864,6 +873,7 @@ static struct radeon_asic r520_asic = {
                 .bandwidth_update = &rv515_bandwidth_update,
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r100_copy_blit,
@@ -937,6 +947,7 @@ static struct radeon_asic r600_asic = {
                 .bandwidth_update = &rv515_bandwidth_update,
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1010,6 +1021,7 @@ static struct radeon_asic rs780_asic = {
                 .bandwidth_update = &rs690_bandwidth_update,
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1083,6 +1095,7 @@ static struct radeon_asic rv770_asic = {
                 .bandwidth_update = &rv515_bandwidth_update,
                 .get_vblank_counter = &rs600_get_vblank_counter,
                 .wait_for_vblank = &avivo_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1156,6 +1169,7 @@ static struct radeon_asic evergreen_asic = {
                 .bandwidth_update = &evergreen_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1229,6 +1243,7 @@ static struct radeon_asic sumo_asic = {
                 .bandwidth_update = &evergreen_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1302,6 +1317,7 @@ static struct radeon_asic btc_asic = {
                 .bandwidth_update = &evergreen_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1406,6 +1422,7 @@ static struct radeon_asic cayman_asic = {
                 .bandwidth_update = &evergreen_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1500,6 +1517,7 @@ static struct radeon_asic trinity_asic = {
                 .bandwidth_update = &dce6_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = &r600_copy_blit,
@@ -1604,6 +1622,7 @@ static struct radeon_asic si_asic = {
                 .bandwidth_update = &dce6_bandwidth_update,
                 .get_vblank_counter = &evergreen_get_vblank_counter,
                 .wait_for_vblank = &dce4_wait_for_vblank,
+                .set_backlight_level = &atombios_set_backlight_level,
         },
         .copy = {
                 .blit = NULL,
@@ -1697,6 +1716,7 @@ int radeon_asic_init(struct radeon_device *rdev)
                         rdev->asic->pm.set_engine_clock = &radeon_legacy_set_engine_clock;
                         rdev->asic->pm.get_memory_clock = &radeon_legacy_get_memory_clock;
                         rdev->asic->pm.set_memory_clock = NULL;
+                        rdev->asic->display.set_backlight_level = &radeon_legacy_set_backlight_level;
                 }
                 break;
         case CHIP_RS400:
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 132429e0cccd..75d6c9e6aa8f 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -42,6 +42,10 @@ uint32_t radeon_atom_get_memory_clock(struct radeon_device *rdev);
 void radeon_atom_set_memory_clock(struct radeon_device *rdev, uint32_t mem_clock);
 void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable);
 
+void atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level);
+void radeon_legacy_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level);
+
+
 /*
  * r100,rv100,rs100,rv200,rs200
  */
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 9910fe494744..ec00deaab9ca 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -290,10 +290,9 @@ static uint8_t radeon_legacy_lvds_level(struct backlight_device *bd)
         return level;
 }
 
-static int radeon_legacy_backlight_update_status(struct backlight_device *bd)
+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;
@@ -301,19 +300,31 @@ 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;
 }
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 1f411c2609d8..5005057974b1 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -698,8 +698,6 @@ void radeon_panel_mode_fixup(struct drm_encoder *encoder,
                              struct drm_display_mode *adjusted_mode);
 void atom_rv515_force_tv_scaler(struct radeon_device *rdev, struct radeon_crtc *radeon_crtc);
 
-void atombios_set_panel_brightness(struct radeon_encoder *radeon_encoder);
-
 /* legacy tv */
 void radeon_legacy_tv_adjust_crtc_reg(struct drm_encoder *encoder,
                                       uint32_t *h_total_disp, uint32_t *h_sync_strt_wid,