From: Russell King Date: Sun, 24 Nov 2013 13:23:17 +0000 (+0000) Subject: imx-drm: imx-drm-core: use array instead of list for CRTCs X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=887eceacc52e3f83fc8dd819c447632d3c0eb7d2;p=deliverable%2Flinux.git imx-drm: imx-drm-core: use array instead of list for CRTCs The DRM core indexes vblank by number, so there's little point maintaining a list, and have to scan the list to find the appropriate structure. Instead, use an array of pointers to the CRTCs. Acked-by: Philipp Zabel Acked-by: Shawn Guo Reviewed-by: Fabio Estevam Signed-off-by: Russell King --- diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c index 92fde89f58ac..c5268847a54e 100644 --- a/drivers/staging/imx-drm/imx-drm-core.c +++ b/drivers/staging/imx-drm/imx-drm-core.c @@ -34,10 +34,12 @@ struct crtc_cookie { struct list_head list; }; +struct imx_drm_crtc; + struct imx_drm_device { struct drm_device *drm; struct device *dev; - struct list_head crtc_list; + struct imx_drm_crtc *crtc[MAX_CRTC]; struct list_head encoder_list; struct list_head connector_list; struct mutex mutex; @@ -47,7 +49,6 @@ struct imx_drm_device { struct imx_drm_crtc { struct drm_crtc *crtc; - struct list_head list; struct imx_drm_device *imxdrm; int pipe; struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs; @@ -69,6 +70,8 @@ struct imx_drm_connector { struct module *owner; }; +static struct imx_drm_device *__imx_drm_device(void); + int imx_drm_crtc_id(struct imx_drm_crtc *crtc) { return crtc->pipe; @@ -96,34 +99,28 @@ static int imx_drm_driver_unload(struct drm_device *drm) return 0; } -/* - * We don't care at all for crtc numbers, but the core expects the - * crtcs to be numbered - */ -static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm, - int num) +struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc) { - struct imx_drm_crtc *imx_drm_crtc; + struct imx_drm_device *imxdrm = __imx_drm_device(); + unsigned i; + + for (i = 0; i < MAX_CRTC; i++) + if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc) + return imxdrm->crtc[i]; - list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) - if (imx_drm_crtc->pipe == num) - return imx_drm_crtc; return NULL; } int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type, u32 interface_pix_fmt, int hsync_pin, int vsync_pin) { - struct imx_drm_device *imxdrm = crtc->dev->dev_private; - struct imx_drm_crtc *imx_crtc; struct imx_drm_crtc_helper_funcs *helper; + struct imx_drm_crtc *imx_crtc; - list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) - if (imx_crtc->crtc == crtc) - goto found; + imx_crtc = imx_drm_find_crtc(crtc); + if (!imx_crtc) + return -EINVAL; - return -EINVAL; -found: helper = &imx_crtc->imx_drm_helper_funcs; if (helper->set_interface_pix_fmt) return helper->set_interface_pix_fmt(crtc, @@ -162,10 +159,9 @@ EXPORT_SYMBOL_GPL(imx_drm_handle_vblank); static int imx_drm_enable_vblank(struct drm_device *drm, int crtc) { struct imx_drm_device *imxdrm = drm->dev_private; - struct imx_drm_crtc *imx_drm_crtc; + struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc]; int ret; - imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); if (!imx_drm_crtc) return -EINVAL; @@ -181,9 +177,8 @@ static int imx_drm_enable_vblank(struct drm_device *drm, int crtc) static void imx_drm_disable_vblank(struct drm_device *drm, int crtc) { struct imx_drm_device *imxdrm = drm->dev_private; - struct imx_drm_crtc *imx_drm_crtc; + struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc]; - imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); if (!imx_drm_crtc) return; @@ -510,7 +505,7 @@ int imx_drm_add_crtc(struct drm_crtc *crtc, imx_drm_crtc->owner = owner; - list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list); + imxdrm->crtc[imx_drm_crtc->pipe] = imx_drm_crtc; *new_crtc = imx_drm_crtc; @@ -533,7 +528,7 @@ int imx_drm_add_crtc(struct drm_crtc *crtc, return 0; err_register: - list_del(&imx_drm_crtc->list); + imxdrm->crtc[imx_drm_crtc->pipe] = NULL; kfree(imx_drm_crtc); err_alloc: err_busy: @@ -553,7 +548,7 @@ int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc) drm_crtc_cleanup(imx_drm_crtc->crtc); - list_del(&imx_drm_crtc->list); + imxdrm->crtc[imx_drm_crtc->pipe] = NULL; drm_mode_group_reinit(imxdrm->drm); @@ -660,14 +655,9 @@ EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs); int imx_drm_encoder_get_mux_id(struct drm_encoder *encoder) { - struct imx_drm_device *imxdrm = __imx_drm_device(); - struct imx_drm_crtc *imx_crtc; - - list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) - if (imx_crtc->crtc == encoder->crtc) - return imx_crtc->mux_id; + struct imx_drm_crtc *imx_crtc = imx_drm_find_crtc(encoder->crtc); - return -EINVAL; + return imx_crtc ? imx_crtc->mux_id : -EINVAL; } EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id); @@ -854,7 +844,6 @@ static int __init imx_drm_init(void) return -ENOMEM; mutex_init(&imx_drm_device->mutex); - INIT_LIST_HEAD(&imx_drm_device->crtc_list); INIT_LIST_HEAD(&imx_drm_device->connector_list); INIT_LIST_HEAD(&imx_drm_device->encoder_list);