diff options
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.patch | 81 |
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 + |