If the LCDC is already enabled (e.g. by the bootloader) at the initialization phase, disable it before returning from the probe.
Signed-off-by: Jyri Sarha <[email protected]> Reported-by: Emiliano Ingrassia <[email protected]> --- This patch should fix the same issus as this patch does: https://lists.freedesktop.org/archives/dri-devel/2017-March/137091.html I do not like the above patch duplicating the already existing code for CRTC disable. Another issue is making the check every time the CRTC is turned on. drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 21 +++++++++++++++++++++ drivers/gpu/drm/tilcdc/tilcdc_drv.c | 3 +++ drivers/gpu/drm/tilcdc/tilcdc_drv.h | 1 + 3 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c index afd2a7b..540378a 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c @@ -566,6 +566,26 @@ void tilcdc_crtc_shutdown(struct drm_crtc *crtc) tilcdc_crtc_off(crtc, true); } +void tilcdc_crtc_disable_init(struct drm_crtc *crtc) +{ + struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); + struct drm_device *dev = crtc->dev; + + /* + * If the LCDC was already enabled (e.g. by the bootloader) + * disable the CRTC before finishing the probe. + */ + pm_runtime_get_sync(dev->dev); + if (tilcdc_read(dev, LCDC_RASTER_CTRL_REG) & LCDC_RASTER_ENABLE) { + tilcdc_crtc->enabled = true; + tilcdc_crtc_enable_irqs(dev); + /* To match pm_runtime_put_sync() in tilcdc_crtc_off() */ + pm_runtime_get_sync(dev->dev); + tilcdc_crtc_off(crtc, false); + } + pm_runtime_put_sync(dev->dev); +} + static bool tilcdc_crtc_is_on(struct drm_crtc *crtc) { return crtc->state && crtc->state->enable && crtc->state->active; @@ -1054,6 +1074,7 @@ int tilcdc_crtc_create(struct drm_device *dev) } priv->crtc = crtc; + return 0; fail: diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index d7ae5be..7dabe55 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -415,6 +415,9 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev) goto init_failed; priv->is_registered = true; + + tilcdc_crtc_disable_init(priv->crtc); + return 0; init_failed: diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h index 8caa11b..adde1e4 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.h +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h @@ -179,6 +179,7 @@ void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc, int tilcdc_crtc_update_fb(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event); +void tilcdc_crtc_disable_init(struct drm_crtc *crtc); int tilcdc_plane_init(struct drm_device *dev, struct drm_plane *plane); -- 1.9.1 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
