diff options
Diffstat (limited to 'overlays/patches/linux/eve-backlight.patch')
| -rw-r--r-- | overlays/patches/linux/eve-backlight.patch | 122 |
1 files changed, 13 insertions, 109 deletions
diff --git a/overlays/patches/linux/eve-backlight.patch b/overlays/patches/linux/eve-backlight.patch index b54a84356a40..00badbfab496 100644 --- a/overlays/patches/linux/eve-backlight.patch +++ b/overlays/patches/linux/eve-backlight.patch @@ -1,7 +1,7 @@ -From 81887483c3d8f651d49876ee96c57bded46705b0 Mon Sep 17 00:00:00 2001 +From 52e857c5b79d9da49d76738065746fe605a30ffe Mon Sep 17 00:00:00 2001 From: Jani Nikula <jani.nikula@intel.com> Date: Wed, 25 Aug 2021 14:06:50 +0300 -Subject: [PATCH 1/5] drm/i915/backlight: extract backlight code to a separate +Subject: [PATCH 1/4] drm/i915/backlight: extract backlight code to a separate file In a long overdue refactoring, split out backlight code to new @@ -2664,15 +2664,15 @@ index 0ee4ff341e25..b27738df447d 100644 #include "intel_crtc.h" #include "intel_de.h" -base-commit: 25960cafa06e6fcd830e6c792e6a7de68c1e25ed +base-commit: a0ebea480bb319a3ad408c99db91262dbc696b76 -- -2.33.0 +2.34.1 -From 51f48c569a821c50eb1f23a60758b954c7de0c57 Mon Sep 17 00:00:00 2001 +From d4b46d294afbb60c4b700e2f97caa4d47b0fa2eb Mon Sep 17 00:00:00 2001 From: Jani Nikula <jani.nikula@intel.com> Date: Wed, 25 Aug 2021 14:06:51 +0300 -Subject: [PATCH 2/5] drm/i915/backlight: mass rename functions to have +Subject: [PATCH 2/4] drm/i915/backlight: mass rename functions to have intel_backlight_ prefix Follow the usual naming conventions. As a drive-by cleanup, also pass @@ -3371,13 +3371,13 @@ index b27738df447d..76910c4b20e0 100644 vlv_dsi_add_properties(intel_connector); -- -2.33.0 +2.34.1 -From 79f3ee76e2861c09d4f8afd351b4b89c331a6a30 Mon Sep 17 00:00:00 2001 +From a352f98738d0d641437421538e6297ece3a71ac0 Mon Sep 17 00:00:00 2001 From: Lyude Paul <lyude@redhat.com> Date: Fri, 5 Nov 2021 14:33:38 -0400 -Subject: [PATCH 3/5] drm/i915: Add support for panels with VESA backlights +Subject: [PATCH 3/4] drm/i915: Add support for panels with VESA backlights with PWM enable/disable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 @@ -3468,109 +3468,13 @@ index 22f15e7b2ecf..3897468140e0 100644 return true; } -- -2.33.0 +2.34.1 -From 80bfbd23a11bd193d0eb2be3af5be61fb298fc7d Mon Sep 17 00:00:00 2001 -From: Lyude Paul <lyude@redhat.com> -Date: Fri, 5 Nov 2021 14:33:40 -0400 -Subject: [PATCH 4/5] drm/dp: Don't read back backlight mode in - drm_edp_backlight_enable() - -As it turns out, apparently some machines will actually leave additional -backlight functionality like dynamic backlight control on before the OS -loads. Currently we don't take care to disable unsupported features when -writing back the backlight mode, which can lead to some rather strange -looking behavior when adjusting the backlight. - -So, let's fix this by just not reading back the current backlight mode on -initial enable. I don't think there should really be any downsides to this, -and this will ensure we don't leave any unsupported functionality enabled. - -This should fix at least one (but not all) of the issues seen with DPCD -backlight support on fi-bdw-samus - -v5: -* Just avoid reading back DPCD register - Doug Anderson - -Signed-off-by: Lyude Paul <lyude@redhat.com> -Fixes: 867cf9cd73c3 ("drm/dp: Extract i915's eDP backlight code into DRM helpers") -Reviewed-by: Douglas Anderson <dianders@chromium.org> -Message-Id: <20211105183342.130810-4-lyude@redhat.com> -(cherry-picked from commit 646596485e1ed2182adf293dfd5aec4a96c46330) ---- - drivers/gpu/drm/drm_dp_helper.c | 40 ++++++++++----------------------- - 1 file changed, 12 insertions(+), 28 deletions(-) - -diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c -index 6d0f2c447f3b..7bb24523a749 100644 ---- a/drivers/gpu/drm/drm_dp_helper.c -+++ b/drivers/gpu/drm/drm_dp_helper.c -@@ -3214,27 +3214,13 @@ int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backli - const u16 level) - { - int ret; -- u8 dpcd_buf, new_dpcd_buf; -+ u8 dpcd_buf = DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD; - -- ret = drm_dp_dpcd_readb(aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf); -- if (ret != 1) { -- drm_dbg_kms(aux->drm_dev, -- "%s: Failed to read backlight mode: %d\n", aux->name, ret); -- return ret < 0 ? ret : -EIO; -- } -- -- new_dpcd_buf = dpcd_buf; -- -- if ((dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK) != DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD) { -- new_dpcd_buf &= ~DP_EDP_BACKLIGHT_CONTROL_MODE_MASK; -- new_dpcd_buf |= DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD; -- -- if (bl->pwmgen_bit_count) { -- ret = drm_dp_dpcd_writeb(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count); -- if (ret != 1) -- drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux pwmgen bit count: %d\n", -- aux->name, ret); -- } -+ if (bl->pwmgen_bit_count) { -+ ret = drm_dp_dpcd_writeb(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count); -+ if (ret != 1) -+ drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux pwmgen bit count: %d\n", -+ aux->name, ret); - } - - if (bl->pwm_freq_pre_divider) { -@@ -3244,16 +3230,14 @@ int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backli - "%s: Failed to write aux backlight frequency: %d\n", - aux->name, ret); - else -- new_dpcd_buf |= DP_EDP_BACKLIGHT_FREQ_AUX_SET_ENABLE; -+ dpcd_buf |= DP_EDP_BACKLIGHT_FREQ_AUX_SET_ENABLE; - } - -- if (new_dpcd_buf != dpcd_buf) { -- ret = drm_dp_dpcd_writeb(aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, new_dpcd_buf); -- if (ret != 1) { -- drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux backlight mode: %d\n", -- aux->name, ret); -- return ret < 0 ? ret : -EIO; -- } -+ ret = drm_dp_dpcd_writeb(aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, dpcd_buf); -+ if (ret != 1) { -+ drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux backlight mode: %d\n", -+ aux->name, ret); -+ return ret < 0 ? ret : -EIO; - } - - ret = drm_edp_backlight_set_level(aux, bl, level); --- -2.33.0 - - -From 51fe90de28690e72b886b936bbb69f9f107cf74c Mon Sep 17 00:00:00 2001 +From 23f71728b29bc8f9949bb05729fc2dd86eaeea8e Mon Sep 17 00:00:00 2001 From: Lyude Paul <lyude@redhat.com> Date: Fri, 5 Nov 2021 14:33:41 -0400 -Subject: [PATCH 5/5] drm/dp, drm/i915: Add support for VESA backlights using +Subject: [PATCH 4/4] drm/dp, drm/i915: Add support for VESA backlights using PWM for brightness control Now that we've added support to i915 for controlling panel backlights that @@ -3877,5 +3781,5 @@ index 1d5b3dbb6e56..2b12e2b0f372 100644 int -- -2.33.0 +2.34.1 |