From cdfd4c689e2a52c313b35ddfc1852ff274f91acb Mon Sep 17 00:00:00 2001 From: Obeida Shamoun Date: Sun, 14 Mar 2021 11:11:10 +0100 Subject: backlight: qcom-wled: Use sink_addr for sync toggle WLED3_SINK_REG_SYNC is, as the name implies, a sink register offset. Therefore, use the sink address as base instead of the ctrl address. This fixes the sync toggle on wled4, which can be observed by the fact that adjusting brightness now works. It has no effect on wled3 because sink and ctrl base addresses are the same. This allows adjusting the brightness without having to disable then reenable the module. Signed-off-by: Obeida Shamoun Signed-off-by: Konrad Dybcio Signed-off-by: Marijn Suijten Reviewed-by: Daniel Thompson Acked-by: Kiran Gunda Signed-off-by: Lee Jones --- drivers/video/backlight/qcom-wled.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 091f07e7c145..fc8b443d10fd 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -336,13 +336,13 @@ static int wled3_sync_toggle(struct wled *wled) unsigned int mask = GENMASK(wled->max_string_count - 1, 0); rc = regmap_update_bits(wled->regmap, - wled->ctrl_addr + WLED3_SINK_REG_SYNC, + wled->sink_addr + WLED3_SINK_REG_SYNC, mask, mask); if (rc < 0) return rc; rc = regmap_update_bits(wled->regmap, - wled->ctrl_addr + WLED3_SINK_REG_SYNC, + wled->sink_addr + WLED3_SINK_REG_SYNC, mask, WLED3_SINK_REG_SYNC_CLEAR); return rc; -- cgit v1.2.3 From 693091d99e7b7f5aa994745e719c69a731173db8 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sun, 21 Mar 2021 12:43:41 +0100 Subject: backlight: ktd253: Support KTD259 The KTD259 works just like KTD253 so add this compatible to the driver. Signed-off-by: Linus Walleij Reviewed-by: Daniel Thompson Signed-off-by: Lee Jones --- drivers/video/backlight/ktd253-backlight.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/video/backlight/ktd253-backlight.c b/drivers/video/backlight/ktd253-backlight.c index d7b287cffd5c..a7df5bcca9da 100644 --- a/drivers/video/backlight/ktd253-backlight.c +++ b/drivers/video/backlight/ktd253-backlight.c @@ -173,6 +173,7 @@ static int ktd253_backlight_probe(struct platform_device *pdev) static const struct of_device_id ktd253_backlight_of_match[] = { { .compatible = "kinetic,ktd253" }, + { .compatible = "kinetic,ktd259" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, ktd253_backlight_of_match); -- cgit v1.2.3 From 4d6e9cdff7fbb6bef3e5559596fab3eeffaf95ca Mon Sep 17 00:00:00 2001 From: Kiran Gunda Date: Thu, 18 Mar 2021 18:09:39 +0530 Subject: backlight: qcom-wled: Fix FSC update issue for WLED5 Currently, for WLED5, the FSC (Full scale current) setting is not updated properly due to driver toggling the wrong register after an FSC update. On WLED5 we should only toggle the MOD_SYNC bit after a brightness update. For an FSC update we need to toggle the SYNC bits instead. Fix it by adopting the common wled3_sync_toggle() for WLED5 and introducing new code to the brightness update path to compensate. Signed-off-by: Kiran Gunda Reviewed-by: Daniel Thompson Signed-off-by: Lee Jones --- drivers/video/backlight/qcom-wled.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index fc8b443d10fd..e9fbe2483844 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -348,7 +348,7 @@ static int wled3_sync_toggle(struct wled *wled) return rc; } -static int wled5_sync_toggle(struct wled *wled) +static int wled5_mod_sync_toggle(struct wled *wled) { int rc; u8 val; @@ -445,10 +445,23 @@ static int wled_update_status(struct backlight_device *bl) goto unlock_mutex; } - rc = wled->wled_sync_toggle(wled); - if (rc < 0) { - dev_err(wled->dev, "wled sync failed rc:%d\n", rc); - goto unlock_mutex; + if (wled->version < 5) { + rc = wled->wled_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "wled sync failed rc:%d\n", rc); + goto unlock_mutex; + } + } else { + /* + * For WLED5 toggling the MOD_SYNC_BIT updates the + * brightness + */ + rc = wled5_mod_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "wled mod sync failed rc:%d\n", + rc); + goto unlock_mutex; + } } } @@ -1459,7 +1472,7 @@ static int wled_configure(struct wled *wled) size = ARRAY_SIZE(wled5_opts); *cfg = wled5_config_defaults; wled->wled_set_brightness = wled5_set_brightness; - wled->wled_sync_toggle = wled5_sync_toggle; + wled->wled_sync_toggle = wled3_sync_toggle; wled->wled_cabc_config = wled5_cabc_config; wled->wled_ovp_delay = wled5_ovp_delay; wled->wled_auto_detection_required = -- cgit v1.2.3 From 5eb622eec92c224c9e51ce9bf0e99a04c875f8bf Mon Sep 17 00:00:00 2001 From: Kiran Gunda Date: Thu, 18 Mar 2021 18:09:40 +0530 Subject: backlight: qcom-wled: Correct the sync_toggle sequence As per the current implementation, after FSC (Full Scale Current) and brightness update the sync bits are set-then-cleared. But, the FSC and brightness sync takes place when the sync bits are set (e.g. on a rising edge). So the hardware team recommends a clear-then-set approach in order to guarantee such a transition regardless of the previous register state. Signed-off-by: Kiran Gunda Reviewed-by: Daniel Thompson Signed-off-by: Lee Jones --- drivers/video/backlight/qcom-wled.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index e9fbe2483844..7c02f87c51c2 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -337,13 +337,13 @@ static int wled3_sync_toggle(struct wled *wled) rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED3_SINK_REG_SYNC, - mask, mask); + mask, WLED3_SINK_REG_SYNC_CLEAR); if (rc < 0) return rc; rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED3_SINK_REG_SYNC, - mask, WLED3_SINK_REG_SYNC_CLEAR); + mask, mask); return rc; } @@ -353,17 +353,17 @@ static int wled5_mod_sync_toggle(struct wled *wled) int rc; u8 val; - val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT : - WLED5_SINK_REG_SYNC_MOD_B_BIT; rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, - WLED5_SINK_REG_SYNC_MASK, val); + WLED5_SINK_REG_SYNC_MASK, 0); if (rc < 0) return rc; + val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT : + WLED5_SINK_REG_SYNC_MOD_B_BIT; return regmap_update_bits(wled->regmap, wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, - WLED5_SINK_REG_SYNC_MASK, 0); + WLED5_SINK_REG_SYNC_MASK, val); } static int wled_ovp_fault_status(struct wled *wled, bool *fault_set) -- cgit v1.2.3 From 04758386757c1ef339b18d996976911be61d5efb Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 22 Mar 2021 17:41:28 +0100 Subject: backlight: journada720: Fix Wmisleading-indentation warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With gcc-11, we get a warning about code that looks correct but badly indented: drivers/video/backlight/jornada720_bl.c: In function ‘jornada_bl_update_status’: drivers/video/backlight/jornada720_bl.c:66:11: error: this ‘else’ clause does not guard... [-Werror=misleading-indentation] 66 | } else /* turn on backlight */ | ^~~~ Change the formatting according to our normal conventions. Fixes: 13a7b5dc0d17 ("backlight: Adds HP Jornada 700 series backlight driver") Signed-off-by: Arnd Bergmann Reviewed-by: Daniel Thompson Signed-off-by: Lee Jones --- drivers/video/backlight/jornada720_bl.c | 44 ++++++++++++++++----------------- 1 file changed, 22 insertions(+), 22 deletions(-) (limited to 'drivers') diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c index 996f7ba3b373..066d0dc98f60 100644 --- a/drivers/video/backlight/jornada720_bl.c +++ b/drivers/video/backlight/jornada720_bl.c @@ -66,30 +66,30 @@ static int jornada_bl_update_status(struct backlight_device *bd) } else /* turn on backlight */ PPSR |= PPC_LDD1; - /* send command to our mcu */ - if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) { - dev_info(&bd->dev, "failed to set brightness\n"); - ret = -ETIMEDOUT; - goto out; - } + /* send command to our mcu */ + if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) { + dev_info(&bd->dev, "failed to set brightness\n"); + ret = -ETIMEDOUT; + goto out; + } - /* - * at this point we expect that the mcu has accepted - * our command and is waiting for our new value - * please note that maximum brightness is 255, - * but due to physical layout it is equal to 0, so we simply - * invert the value (MAX VALUE - NEW VALUE). - */ - if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness) - != TXDUMMY) { - dev_err(&bd->dev, "set brightness failed\n"); - ret = -ETIMEDOUT; - } + /* + * at this point we expect that the mcu has accepted + * our command and is waiting for our new value + * please note that maximum brightness is 255, + * but due to physical layout it is equal to 0, so we simply + * invert the value (MAX VALUE - NEW VALUE). + */ + if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness) + != TXDUMMY) { + dev_err(&bd->dev, "set brightness failed\n"); + ret = -ETIMEDOUT; + } - /* - * If infact we get an TXDUMMY as output we are happy and dont - * make any further comments about it - */ + /* + * If infact we get an TXDUMMY as output we are happy and dont + * make any further comments about it + */ out: jornada_ssp_end(); -- cgit v1.2.3