pwm_info helps in encapsulating the PWM period_ns values and will form basis of adding new pwm devices which can then be genrically used by initializing proper pwm_info structure in the backlight setup call.
v2: Rebase on latest code. Add BZ details Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96571 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90075 Cc: cbroo...@gmail.com Cc: jani.nik...@linux.intel.com Tested-by: Lluís Batlle i Rossell <vi...@viric.name> Signed-off-by: Shobhit Kumar <shobhit.ku...@intel.com> --- drivers/gpu/drm/i915/intel_drv.h | 8 ++++++- drivers/gpu/drm/i915/intel_panel.c | 47 +++++++++++++++++++++++--------------- 2 files changed, 36 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index cc13706..17af59c 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -263,6 +263,12 @@ struct intel_encoder { const struct drm_connector *audio_connector; }; +struct intel_pwm_info { + struct pwm_device *dev; + unsigned int period_ns; + char *name; +}; + struct intel_panel { struct drm_display_mode *fixed_mode; struct drm_display_mode *downclock_mode; @@ -282,7 +288,7 @@ struct intel_panel { /* PWM chip */ bool util_pin_active_low; /* bxt+ */ u8 controller; /* bxt+ only */ - struct pwm_device *pwm; + struct intel_pwm_info *pwm; struct backlight_device *device; diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index c8103f8..d56d1c2 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -37,6 +37,13 @@ #define CRC_PMIC_PWM_PERIOD_NS 21333 +/* CRC PMIC based PWM Information */ +struct intel_pwm_info crc_pwm_info = { + .period_ns = CRC_PMIC_PWM_PERIOD_NS, + .name = "pwm_backlight", + .dev = NULL, +}; + void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, struct drm_display_mode *adjusted_mode) @@ -536,10 +543,11 @@ static u32 bxt_get_backlight(struct intel_connector *connector) static u32 pwm_get_backlight(struct intel_connector *connector) { struct intel_panel *panel = &connector->panel; + struct intel_pwm_info *pwm = panel->backlight.pwm; int duty_ns; - duty_ns = pwm_get_duty_cycle(panel->backlight.pwm); - return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS); + duty_ns = pwm_get_duty_cycle(pwm->dev); + return DIV_ROUND_UP(duty_ns * 100, pwm->period_ns); } static u32 intel_panel_get_backlight(struct intel_connector *connector) @@ -628,9 +636,10 @@ static void bxt_set_backlight(struct intel_connector *connector, u32 level) static void pwm_set_backlight(struct intel_connector *connector, u32 level) { struct intel_panel *panel = &connector->panel; - int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100); + struct intel_pwm_info *pwm = panel->backlight.pwm; + int duty_ns = DIV_ROUND_UP(level * pwm->period_ns, 100); - pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); + pwm_config(pwm->dev, duty_ns, pwm->period_ns); } static void @@ -799,11 +808,12 @@ static void bxt_disable_backlight(struct intel_connector *connector) static void pwm_disable_backlight(struct intel_connector *connector) { struct intel_panel *panel = &connector->panel; + struct intel_pwm_info *pwm = panel->backlight.pwm; /* Disable the backlight */ - pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS); + pwm_config(pwm->dev, 0, pwm->period_ns); usleep_range(2000, 3000); - pwm_disable(panel->backlight.pwm); + pwm_disable(pwm->dev); } void intel_panel_disable_backlight(struct intel_connector *connector) @@ -1090,7 +1100,7 @@ static void pwm_enable_backlight(struct intel_connector *connector) { struct intel_panel *panel = &connector->panel; - pwm_enable(panel->backlight.pwm); + pwm_enable(panel->backlight.pwm->dev); intel_panel_actually_set_backlight(connector, panel->backlight.level); } @@ -1649,12 +1659,13 @@ static int pwm_setup_backlight(struct intel_connector *connector, { struct drm_device *dev = connector->base.dev; struct intel_panel *panel = &connector->panel; + struct intel_pwm_info *pwm = &crc_pwm_info; int retval; /* Get the PWM chip for backlight control */ - panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight"); - if (IS_ERR(panel->backlight.pwm)) { - DRM_ERROR("Failed to own the pwm chip\n"); + pwm->dev = pwm_get(dev->dev, pwm->name); + if (IS_ERR(pwm->dev)) { + DRM_ERROR("Failed to own the pwm chip: %s\n", pwm->name); panel->backlight.pwm = NULL; return -ENODEV; } @@ -1663,13 +1674,12 @@ static int pwm_setup_backlight(struct intel_connector *connector, * FIXME: pwm_apply_args() should be removed when switching to * the atomic PWM API. */ - pwm_apply_args(panel->backlight.pwm); + pwm_apply_args(pwm->dev); - retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS, - CRC_PMIC_PWM_PERIOD_NS); + retval = pwm_config(pwm->dev, pwm->period_ns, pwm->period_ns); if (retval < 0) { - DRM_ERROR("Failed to configure the pwm chip\n"); - pwm_put(panel->backlight.pwm); + DRM_ERROR("Failed to configure the pwm chip: %s\n", pwm->name); + pwm_put(pwm->dev); panel->backlight.pwm = NULL; return retval; } @@ -1677,10 +1687,11 @@ static int pwm_setup_backlight(struct intel_connector *connector, panel->backlight.min = 0; /* 0% */ panel->backlight.max = 100; /* 100% */ panel->backlight.level = DIV_ROUND_UP( - pwm_get_duty_cycle(panel->backlight.pwm) * 100, - CRC_PMIC_PWM_PERIOD_NS); + pwm_get_duty_cycle(pwm->dev) * 100, pwm->period_ns); panel->backlight.enabled = panel->backlight.level != 0; + panel->backlight.pwm = pwm; + return 0; } @@ -1732,7 +1743,7 @@ void intel_panel_destroy_backlight(struct drm_connector *connector) /* dispose of the pwm */ if (panel->backlight.pwm) - pwm_put(panel->backlight.pwm); + pwm_put(panel->backlight.pwm->dev); panel->backlight.present = false; } -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
