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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0409-drm-amd-display-Implement-support-for-backlight-opti.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0409-drm-amd-display-Implement-support-for-backlight-opti.patch81
1 files changed, 81 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0409-drm-amd-display-Implement-support-for-backlight-opti.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0409-drm-amd-display-Implement-support-for-backlight-opti.patch
new file mode 100644
index 00000000..7ec43ea9
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0409-drm-amd-display-Implement-support-for-backlight-opti.patch
@@ -0,0 +1,81 @@
+From c59e3d5ab9600899f81faefedf13d4dc85c47685 Mon Sep 17 00:00:00 2001
+From: Anthony Koo <Anthony.Koo@amd.com>
+Date: Thu, 4 May 2017 14:09:09 -0400
+Subject: [PATCH 0409/4131] drm/amd/display: Implement support for backlight
+ optimization
+
+- Add functionality to get real hw backlight level as opposed to user
+level, meaning the level that takes into account backlight ramping
+over time and backlight reduction due to Varibright
+- Add backlight optimization which allows for a second OS state
+that is able to control ABM
+
+Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
+Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
+Acked-by: Harry Wentland <Harry.Wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 13 +++++++++++--
+ drivers/gpu/drm/amd/display/dc/inc/hw/abm.h | 1 +
+ 2 files changed, 12 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+index 393c435..cefffe1 100644
+--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
++++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+@@ -60,7 +60,7 @@ struct abm_backlight_registers {
+ static struct abm_backlight_registers stored_backlight_registers = {0};
+
+
+-static unsigned int get_current_backlight(struct dce_abm *abm_dce)
++static unsigned int get_current_backlight_16_bit(struct dce_abm *abm_dce)
+ {
+ uint64_t current_backlight;
+ uint32_t round_result;
+@@ -252,7 +252,7 @@ static void dmcu_set_backlight_level(
+ static void dce_abm_init(struct abm *abm)
+ {
+ struct dce_abm *abm_dce = TO_DCE_ABM(abm);
+- unsigned int backlight = get_current_backlight(abm_dce);
++ unsigned int backlight = get_current_backlight_16_bit(abm_dce);
+
+ REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x103);
+ REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x101);
+@@ -289,6 +289,14 @@ static void dce_abm_init(struct abm *abm)
+ ABM1_BL_REG_READ_MISSED_FRAME_CLEAR, 1);
+ }
+
++static unsigned int dce_abm_get_current_backlight_8_bit(struct abm *abm)
++{
++ struct dce_abm *abm_dce = TO_DCE_ABM(abm);
++ unsigned int backlight = REG_READ(BL1_PWM_CURRENT_ABM_LEVEL);
++
++ return (backlight >> 8);
++}
++
+ static bool dce_abm_set_level(struct abm *abm, uint32_t level)
+ {
+ struct dce_abm *abm_dce = TO_DCE_ABM(abm);
+@@ -405,6 +413,7 @@ static const struct abm_funcs dce_funcs = {
+ .set_abm_level = dce_abm_set_level,
+ .init_backlight = dce_abm_init_backlight,
+ .set_backlight_level = dce_abm_set_backlight_level,
++ .get_current_backlight_8_bit = dce_abm_get_current_backlight_8_bit,
+ .is_dmcu_initialized = is_dmcu_initialized
+ };
+
+diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
+index ceabbd3..da465b3 100644
+--- a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
++++ b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
+@@ -40,6 +40,7 @@ struct abm_funcs {
+ unsigned int backlight_level,
+ unsigned int frame_ramp,
+ unsigned int controller_id);
++ unsigned int (*get_current_backlight_8_bit)(struct abm *abm);
+ bool (*is_dmcu_initialized)(struct abm *abm);
+ };
+
+--
+2.7.4
+