diff options
Diffstat (limited to 'drivers/gpu/drm/tilcdc/tilcdc_panel.c')
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_panel.c | 111 |
1 files changed, 75 insertions, 36 deletions
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c index 86c67329b60..7a0315855e9 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c @@ -18,6 +18,7 @@ #include <linux/pinctrl/pinmux.h> #include <linux/pinctrl/consumer.h> #include <linux/backlight.h> +#include <linux/gpio/consumer.h> #include <video/display_timing.h> #include <video/of_display_timing.h> #include <video/videomode.h> @@ -29,6 +30,7 @@ struct panel_module { struct tilcdc_panel_info *info; struct display_timings *timings; struct backlight_device *backlight; + struct gpio_desc *enable_gpio; }; #define to_panel_module(x) container_of(x, struct panel_module, base) @@ -55,13 +57,17 @@ static void panel_encoder_dpms(struct drm_encoder *encoder, int mode) { struct panel_encoder *panel_encoder = to_panel_encoder(encoder); struct backlight_device *backlight = panel_encoder->mod->backlight; + struct gpio_desc *gpio = panel_encoder->mod->enable_gpio; - if (!backlight) - return; + if (backlight) { + backlight->props.power = mode == DRM_MODE_DPMS_ON ? + FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; + backlight_update_status(backlight); + } - backlight->props.power = mode == DRM_MODE_DPMS_ON - ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; - backlight_update_status(backlight); + if (gpio) + gpiod_set_value_cansleep(gpio, + mode == DRM_MODE_DPMS_ON ? 1 : 0); } static bool panel_encoder_mode_fixup(struct drm_encoder *encoder, @@ -151,6 +157,7 @@ struct panel_connector { static void panel_connector_destroy(struct drm_connector *connector) { struct panel_connector *panel_connector = to_panel_connector(connector); + drm_connector_unregister(connector); drm_connector_cleanup(connector); kfree(panel_connector); } @@ -247,7 +254,7 @@ static struct drm_connector *panel_connector_create(struct drm_device *dev, if (ret) goto fail; - drm_sysfs_connector_add(connector); + drm_connector_register(connector); return connector; @@ -281,23 +288,8 @@ static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) return 0; } -static void panel_destroy(struct tilcdc_module *mod) -{ - struct panel_module *panel_mod = to_panel_module(mod); - - if (panel_mod->timings) { - display_timings_release(panel_mod->timings); - kfree(panel_mod->timings); - } - - tilcdc_module_cleanup(mod); - kfree(panel_mod->info); - kfree(panel_mod); -} - static const struct tilcdc_module_ops panel_module_ops = { .modeset_init = panel_modeset_init, - .destroy = panel_destroy, }; /* @@ -325,6 +317,7 @@ static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np) info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) { pr_err("%s: allocation failed\n", __func__); + of_node_put(info_np); return NULL; } @@ -345,22 +338,21 @@ static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np) if (ret) { pr_err("%s: error reading panel-info properties\n", __func__); kfree(info); + of_node_put(info_np); return NULL; } + of_node_put(info_np); return info; } -static struct of_device_id panel_of_match[]; - static int panel_probe(struct platform_device *pdev) { - struct device_node *node = pdev->dev.of_node; + struct device_node *bl_node, *node = pdev->dev.of_node; struct panel_module *panel_mod; struct tilcdc_module *mod; struct pinctrl *pinctrl; - int ret = -EINVAL; - + int ret; /* bail out early if no DT data: */ if (!node) { @@ -368,11 +360,42 @@ static int panel_probe(struct platform_device *pdev) return -ENXIO; } - panel_mod = kzalloc(sizeof(*panel_mod), GFP_KERNEL); + panel_mod = devm_kzalloc(&pdev->dev, sizeof(*panel_mod), GFP_KERNEL); if (!panel_mod) return -ENOMEM; + bl_node = of_parse_phandle(node, "backlight", 0); + if (bl_node) { + panel_mod->backlight = of_find_backlight_by_node(bl_node); + of_node_put(bl_node); + + if (!panel_mod->backlight) + return -EPROBE_DEFER; + + dev_info(&pdev->dev, "found backlight\n"); + } + + panel_mod->enable_gpio = devm_gpiod_get(&pdev->dev, "enable"); + if (IS_ERR(panel_mod->enable_gpio)) { + ret = PTR_ERR(panel_mod->enable_gpio); + if (ret != -ENOENT) { + dev_err(&pdev->dev, "failed to request enable GPIO\n"); + goto fail_backlight; + } + + /* Optional GPIO is not here, continue silently. */ + panel_mod->enable_gpio = NULL; + } else { + ret = gpiod_direction_output(panel_mod->enable_gpio, 0); + if (ret < 0) { + dev_err(&pdev->dev, "failed to setup GPIO\n"); + goto fail_backlight; + } + dev_info(&pdev->dev, "found enable GPIO\n"); + } + mod = &panel_mod->base; + pdev->dev.platform_data = mod; tilcdc_module_init(mod, "panel", &panel_module_ops); @@ -380,34 +403,50 @@ static int panel_probe(struct platform_device *pdev) if (IS_ERR(pinctrl)) dev_warn(&pdev->dev, "pins are not configured\n"); - panel_mod->timings = of_get_display_timings(node); if (!panel_mod->timings) { dev_err(&pdev->dev, "could not get panel timings\n"); - goto fail; + ret = -EINVAL; + goto fail_free; } panel_mod->info = of_get_panel_info(node); if (!panel_mod->info) { dev_err(&pdev->dev, "could not get panel info\n"); - goto fail; + ret = -EINVAL; + goto fail_timings; } mod->preferred_bpp = panel_mod->info->bpp; - panel_mod->backlight = of_find_backlight_by_node(node); - if (panel_mod->backlight) - dev_info(&pdev->dev, "found backlight\n"); - return 0; -fail: - panel_destroy(mod); +fail_timings: + display_timings_release(panel_mod->timings); + +fail_free: + tilcdc_module_cleanup(mod); + +fail_backlight: + if (panel_mod->backlight) + put_device(&panel_mod->backlight->dev); return ret; } static int panel_remove(struct platform_device *pdev) { + struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); + struct panel_module *panel_mod = to_panel_module(mod); + struct backlight_device *backlight = panel_mod->backlight; + + if (backlight) + put_device(&backlight->dev); + + display_timings_release(panel_mod->timings); + + tilcdc_module_cleanup(mod); + kfree(panel_mod->info); + return 0; } |