[src/trunk]: src/sys/external/bsd/drm2/i915drm Implement i915drmkms wsdisplay...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f8f6c751d574
branches:  trunk
changeset: 330262:f8f6c751d574
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Jul 01 20:03:21 2014 +0000

description:
Implement i915drmkms wsdisplay blank/backlight/brightness controls.

diffstat:

 sys/external/bsd/drm2/i915drm/i915_pci.c |  145 ++++++++++++++++++++++++++++++-
 1 files changed, 143 insertions(+), 2 deletions(-)

diffs (202 lines):

diff -r b181af80c52c -r f8f6c751d574 sys/external/bsd/drm2/i915drm/i915_pci.c
--- a/sys/external/bsd/drm2/i915drm/i915_pci.c  Tue Jul 01 17:11:35 2014 +0000
+++ b/sys/external/bsd/drm2/i915drm/i915_pci.c  Tue Jul 01 20:03:21 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_pci.c,v 1.8 2014/04/25 19:02:51 riastradh Exp $   */
+/*     $NetBSD: i915_pci.c,v 1.9 2014/07/01 20:03:21 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_pci.c,v 1.8 2014/04/25 19:02:51 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_pci.c,v 1.9 2014/07/01 20:03:21 riastradh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "vga.h"
@@ -73,6 +73,8 @@
        struct drm_i915_gem_object      *sc_fb_obj;
        bus_space_handle_t              sc_fb_bsh;
        struct genfb_softc              sc_genfb;
+       struct genfb_parameter_callback sc_genfb_backlight_callback;
+       struct genfb_parameter_callback sc_genfb_brightness_callback;
        struct list_head                sc_fb_list; /* XXX Kludge!  */
        bool                            sc_console;
 };
@@ -97,10 +99,19 @@
                    struct drm_file *, unsigned int *);
 static void    i915drm_fb_destroy(struct drm_framebuffer *);
 
+static int     i915drm_fb_dpms(struct i915drm_softc *, int);
+
 static int     i915drm_genfb_ioctl(void *, void *, unsigned long, void *,
                    int, struct lwp *);
 static paddr_t i915drm_genfb_mmap(void *, void *, off_t, int);
 
+static int     i915drm_genfb_get_backlight(void *, int *);
+static int     i915drm_genfb_set_backlight(void *, int);
+static int     i915drm_genfb_upd_backlight(void *, int);
+static int     i915drm_genfb_get_brightness(void *, int *);
+static int     i915drm_genfb_set_brightness(void *, int);
+static int     i915drm_genfb_upd_brightness(void *, int);
+
 CFATTACH_DECL_NEW(i915drmkms, sizeof(struct i915drm_softc),
     i915drm_match, i915drm_attach, i915drm_detach, NULL);
 
@@ -467,6 +478,25 @@
        CTASSERT(sizeof(uintptr_t) <= sizeof(uint64_t));
        prop_dictionary_set_uint64(dict, "virtual_address",
            (uint64_t)(uintptr_t)bus_space_vaddr(dev->bst, sc->sc_fb_bsh));
+
+       sc->sc_genfb_backlight_callback = (struct genfb_parameter_callback) {
+               .gpc_cookie = sc,
+               .gpc_get_parameter = &i915drm_genfb_get_backlight,
+               .gpc_set_parameter = &i915drm_genfb_set_backlight,
+               .gpc_upd_parameter = &i915drm_genfb_upd_backlight,
+       };
+       prop_dictionary_set_uint64(dict, "backlight_callback",
+           (uint64_t)(uintptr_t)&sc->sc_genfb_backlight_callback);
+
+       sc->sc_genfb_brightness_callback = (struct genfb_parameter_callback) {
+               .gpc_cookie = sc,
+               .gpc_get_parameter = &i915drm_genfb_get_brightness,
+               .gpc_set_parameter = &i915drm_genfb_set_brightness,
+               .gpc_upd_parameter = &i915drm_genfb_upd_brightness,
+       };
+       prop_dictionary_set_uint64(dict, "brightness_callback",
+           (uint64_t)(uintptr_t)&sc->sc_genfb_brightness_callback);
+
        sc->sc_genfb.sc_dev = sc->sc_dev;
        genfb_init(&sc->sc_genfb);
 
@@ -494,6 +524,28 @@
        return ret;
 }
 
+static int
+i915drm_fb_dpms(struct i915drm_softc *sc, int dpms_mode)
+{
+       struct drm_device *const dev = &sc->sc_drm_dev;
+       struct drm_i915_private *const dev_priv = dev->dev_private;
+       /* XXX What guarantees dev_priv->fbdev stays around?  */
+       struct drm_fb_helper *const fb_helper = &dev_priv->fbdev->helper;
+       unsigned i;
+
+       mutex_lock(&dev->mode_config.mutex);
+       for (i = 0; i < fb_helper->connector_count; i++) {
+               struct drm_connector *const connector =
+                   fb_helper->connector_info[i]->connector;
+               (*connector->funcs->dpms)(connector, dpms_mode);
+               drm_object_property_set_value(&connector->base,
+                   dev->mode_config.dpms_property, dpms_mode);
+       }
+       mutex_unlock(&dev->mode_config.mutex);
+
+       return 0;
+}
+
 static void
 i915drm_fb_detach(struct drm_fb_helper *fb_helper)
 {
@@ -549,6 +601,29 @@
                return wsdisplayio_busid_pci(genfb->sc_dev,
                    pa->pa_pc, pa->pa_tag, data);
 
+       /*
+        * Screen blanking ioctls.  Not to be confused with backlight
+        * (can be disabled while stuff is still drawn on the screen),
+        * brightness, or contrast (which we don't support).  Backlight
+        * and brightness are done through WSDISPLAYIO_{GET,SET}PARAM.
+        * This toggles between DPMS ON and DPMS OFF; backlight toggles
+        * between DPMS ON and DPMS SUSPEND.
+        */
+       case WSDISPLAYIO_GVIDEO: {
+               int *onp = (int *)data;
+
+               /* XXX Can't really determine a single answer here.  */
+               *onp = 1;
+               return 0;
+       }
+
+       case WSDISPLAYIO_SVIDEO: {
+               const int on = *(const int *)data;
+
+               return i915drm_fb_dpms(sc,
+                   on? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF);
+       }
+
        default:
                return EPASSTHROUGH;
        }
@@ -613,3 +688,69 @@
        /* Failure!  */
        return -1;
 }
+
+static int
+i915drm_genfb_get_backlight(void *cookie, int *enablep)
+{
+       struct i915drm_softc *const sc = cookie;
+       struct drm_device *const dev = &sc->sc_drm_dev;
+       struct drm_i915_private *const dev_priv = dev->dev_private;
+
+       *enablep = dev_priv->backlight_enabled;
+
+       return 0;
+}
+
+static int
+i915drm_genfb_set_backlight(void *cookie, int enable)
+{
+       struct i915drm_softc *const sc = cookie;
+
+       return i915drm_fb_dpms(sc,
+           enable? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_SUSPEND);
+}
+
+static int
+i915drm_genfb_upd_backlight(void *cookie __unused, int step __unused)
+{
+
+       panic("can't update i915drm backlight");
+}
+
+static int
+i915drm_genfb_get_brightness(void *cookie, int *brightnessp)
+{
+       struct i915drm_softc *const sc = cookie;
+       struct drm_device *const dev = &sc->sc_drm_dev;
+       struct drm_i915_private *const dev_priv = dev->dev_private;
+
+       *brightnessp = dev_priv->backlight_level;
+
+       return 0;
+}
+
+static int
+i915drm_genfb_set_brightness(void *cookie, int brightness)
+{
+       struct i915drm_softc *const sc = cookie;
+       struct drm_device *const dev = &sc->sc_drm_dev;
+
+       intel_panel_set_backlight(dev,
+           MIN(brightness, intel_panel_get_max_backlight(dev)));
+
+       return 0;
+}
+
+static int
+i915drm_genfb_upd_brightness(void *cookie, int delta)
+{
+       struct i915drm_softc *const sc = cookie;
+       struct drm_device *const dev = &sc->sc_drm_dev;
+       struct drm_i915_private *const dev_priv = dev->dev_private;
+
+       intel_panel_set_backlight(dev,
+           MIN(dev_priv->backlight_level + delta,
+               intel_panel_get_max_backlight(dev)));
+
+       return 0;
+}