Attachment 125562 Details for Bug 31122 – backlight control w/ gpio check

[patch] backlight control w/ gpio check

nouveau_backlight.c.patch.v2 (text/plain), 2.95 KB, created by A. Chaud on 2016-08-05 18:17:52 UTC

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Creator: A. Chaud

Created: 2016-08-05 18:17:52 UTC

Size: 2.95 KB

patch

obsolete

>--- nouveau_backlight.c.orig	2016-08-04 20:59:42.590183002 -0400
>+++ /usr/src/linux-source-4.6/drivers/gpu/drm/nouveau/nouveau_backlight.c	2016-08-05 14:07:48.201650333 -0400
>@@ -35,6 +35,82 @@
> #include "nouveau_drm.h"
> #include "nouveau_reg.h"
> #include "nouveau_encoder.h"
>+#include <nvif/device.h>
>+#include <nvkm/subdev/bios/gpio.h>
>+
>+#ifdef __powerpc__
>+
>+const int NV30_BL_CURVE[9] = {0x000,0x16d,0x1f7,0x281,0x30b,0x395,0x41f,0x4a9,0x534};
>+
>+static int
>+nv30_get_intensity(struct backlight_device *bd)
>+{
>+        struct nouveau_drm *drm = bl_get_data(bd);
>+        struct nvif_object *device = &drm->device.object;
>+        int val = (nvif_rd32(device, NV30_PMC_BACKLIGHT) &
>+                                   NV30_PMC_BACKLIGHT_MASK) >> 16;
>+        int i;
>+        for(i=0;i<sizeof(NV30_BL_CURVE)/sizeof(NV30_BL_CURVE[0]);i++)
>+        {
>+                if(NV30_BL_CURVE[i] == val) return i;
>+        }
>+
>+        return sizeof(NV30_BL_CURVE)/sizeof(NV30_BL_CURVE[0]);
>+
>+}
>+
>+static int
>+nv30_set_intensity(struct backlight_device *bd)
>+{
>+        struct nouveau_drm *drm = bl_get_data(bd);
>+        struct nvif_object *device = &drm->device.object;
>+        int val = bd->props.brightness;
>+
>+        nvif_wr32(device, NV30_PMC_BACKLIGHT,
>+                 (NV30_BL_CURVE[val] << 16) + 0x80000535);
>+
>+        return 0;
>+}
>+
>+static const struct backlight_ops nv30_bl_ops = {
>+        .options = BL_CORE_SUSPENDRESUME,
>+        .get_brightness = nv30_get_intensity,
>+        .update_status = nv30_set_intensity,
>+};
>+
>+static int
>+nv30_backlight_init(struct drm_connector *connector)
>+{
>+        struct nouveau_drm *drm = nouveau_drm(connector->dev);
>+        struct nvif_object *device = &drm->device.object;
>+        struct backlight_properties props;
>+        struct backlight_device *bd;
>+	
>+	struct dcb_gpio_func func;
>+	struct nvkm_gpio *gpio = nvxx_gpio(&drm->device);
>+	int ret = nvkm_gpio_find(gpio, 0,0x00,0xff, &func);
>+	
>+	if(ret!=0) 
>+		return 0;
>+
>+        if (!(nvif_rd32(device, NV30_PMC_BACKLIGHT) & NV30_PMC_BACKLIGHT_MASK))
>+                return 0;
>+
>+        memset(&props, 0, sizeof(struct backlight_properties));
>+        props.type = BACKLIGHT_RAW;
>+        props.max_brightness = sizeof(NV30_BL_CURVE)/sizeof(NV30_BL_CURVE[0])-1;
>+        bd = backlight_device_register("nv_backlight", connector->kdev, drm,
>+                                       &nv30_bl_ops, &props);
>+        if (IS_ERR(bd))
>+                return PTR_ERR(bd);
>+        drm->backlight = bd;
>+        bd->props.brightness = nv30_get_intensity(bd);
>+        backlight_update_status(bd);
>+
>+        return 0;
>+}
>+
>+#endif
> 
> static int
> nv40_get_intensity(struct backlight_device *bd)
>@@ -227,6 +303,10 @@
> 			continue;
> 
> 		switch (device->info.family) {
>+#ifdef __powerpc__
>+                case NV_DEVICE_INFO_V0_RANKINE:
>+                        return nv30_backlight_init(connector);
>+#endif
> 		case NV_DEVICE_INFO_V0_CURIE:
> 			return nv40_backlight_init(connector);
> 		case NV_DEVICE_INFO_V0_TESLA:

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Attachments on bug 31122: 125547 | 125548 | 125561 | 125562 | 125642 | 125817

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