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Message-ID: <202301010414.gzia8KzY-lkp@intel.com>
Date: Tue, 3 Jan 2023 11:07:45 +0300
From: Dan Carpenter <error27@...il.com>
To: oe-kbuild@...ts.linux.dev,
Michael Riesch <michael.riesch@...fvision.net>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Heiko Stuebner <heiko@...ech.de>,
Sandy Huang <hjc@...k-chips.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Sascha Hauer <sha@...gutronix.de>,
Michael Riesch <michael.riesch@...fvision.net>
Subject: Re: [PATCH 3/5] drm/rockchip: vop2: use symmetric function pair
vop2_{create,destroy}_crtcs
Hi Michael,
url: https://github.com/intel-lab-lkp/linux/commits/Michael-Riesch/drm-rockchip-vop2-add-support-for-the-rgb-output-block/20221130-220346
base: b7b275e60bcd5f89771e865a8239325f86d9927d
patch link: https://lore.kernel.org/r/20221130140217.3196414-4-michael.riesch%40wolfvision.net
patch subject: [PATCH 3/5] drm/rockchip: vop2: use symmetric function pair vop2_{create,destroy}_crtcs
config: parisc-randconfig-m031-20221225
compiler: hppa-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
New smatch warnings:
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2330 vop2_create_crtcs() error: uninitialized symbol 'possible_crtcs'.
vim +/possible_crtcs +2330 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
fb83276e59f2d6 Michael Riesch 2022-11-30 2249 static int vop2_create_crtcs(struct vop2 *vop2)
604be85547ce4d Andy Yan 2022-04-22 2250 {
604be85547ce4d Andy Yan 2022-04-22 2251 const struct vop2_data *vop2_data = vop2->data;
604be85547ce4d Andy Yan 2022-04-22 2252 struct drm_device *drm = vop2->drm;
604be85547ce4d Andy Yan 2022-04-22 2253 struct device *dev = vop2->dev;
604be85547ce4d Andy Yan 2022-04-22 2254 struct drm_plane *plane;
604be85547ce4d Andy Yan 2022-04-22 2255 struct device_node *port;
604be85547ce4d Andy Yan 2022-04-22 2256 struct vop2_video_port *vp;
604be85547ce4d Andy Yan 2022-04-22 2257 int i, nvp, nvps = 0;
604be85547ce4d Andy Yan 2022-04-22 2258 int ret;
604be85547ce4d Andy Yan 2022-04-22 2259
604be85547ce4d Andy Yan 2022-04-22 2260 for (i = 0; i < vop2_data->nr_vps; i++) {
604be85547ce4d Andy Yan 2022-04-22 2261 const struct vop2_video_port_data *vp_data;
604be85547ce4d Andy Yan 2022-04-22 2262 struct device_node *np;
604be85547ce4d Andy Yan 2022-04-22 2263 char dclk_name[9];
604be85547ce4d Andy Yan 2022-04-22 2264
604be85547ce4d Andy Yan 2022-04-22 2265 vp_data = &vop2_data->vp[i];
604be85547ce4d Andy Yan 2022-04-22 2266 vp = &vop2->vps[i];
604be85547ce4d Andy Yan 2022-04-22 2267 vp->vop2 = vop2;
604be85547ce4d Andy Yan 2022-04-22 2268 vp->id = vp_data->id;
604be85547ce4d Andy Yan 2022-04-22 2269 vp->regs = vp_data->regs;
604be85547ce4d Andy Yan 2022-04-22 2270 vp->data = vp_data;
604be85547ce4d Andy Yan 2022-04-22 2271
604be85547ce4d Andy Yan 2022-04-22 2272 snprintf(dclk_name, sizeof(dclk_name), "dclk_vp%d", vp->id);
604be85547ce4d Andy Yan 2022-04-22 2273 vp->dclk = devm_clk_get(vop2->dev, dclk_name);
604be85547ce4d Andy Yan 2022-04-22 2274 if (IS_ERR(vp->dclk)) {
604be85547ce4d Andy Yan 2022-04-22 2275 drm_err(vop2->drm, "failed to get %s\n", dclk_name);
604be85547ce4d Andy Yan 2022-04-22 2276 return PTR_ERR(vp->dclk);
604be85547ce4d Andy Yan 2022-04-22 2277 }
604be85547ce4d Andy Yan 2022-04-22 2278
604be85547ce4d Andy Yan 2022-04-22 2279 np = of_graph_get_remote_node(dev->of_node, i, -1);
604be85547ce4d Andy Yan 2022-04-22 2280 if (!np) {
604be85547ce4d Andy Yan 2022-04-22 2281 drm_dbg(vop2->drm, "%s: No remote for vp%d\n", __func__, i);
604be85547ce4d Andy Yan 2022-04-22 2282 continue;
604be85547ce4d Andy Yan 2022-04-22 2283 }
604be85547ce4d Andy Yan 2022-04-22 2284 of_node_put(np);
604be85547ce4d Andy Yan 2022-04-22 2285
604be85547ce4d Andy Yan 2022-04-22 2286 port = of_graph_get_port_by_id(dev->of_node, i);
604be85547ce4d Andy Yan 2022-04-22 2287 if (!port) {
604be85547ce4d Andy Yan 2022-04-22 2288 drm_err(vop2->drm, "no port node found for video_port%d\n", i);
604be85547ce4d Andy Yan 2022-04-22 2289 return -ENOENT;
604be85547ce4d Andy Yan 2022-04-22 2290 }
604be85547ce4d Andy Yan 2022-04-22 2291
604be85547ce4d Andy Yan 2022-04-22 2292 vp->crtc.port = port;
604be85547ce4d Andy Yan 2022-04-22 2293 nvps++;
604be85547ce4d Andy Yan 2022-04-22 2294 }
604be85547ce4d Andy Yan 2022-04-22 2295
604be85547ce4d Andy Yan 2022-04-22 2296 nvp = 0;
604be85547ce4d Andy Yan 2022-04-22 2297 for (i = 0; i < vop2->registered_num_wins; i++) {
604be85547ce4d Andy Yan 2022-04-22 2298 struct vop2_win *win = &vop2->win[i];
604be85547ce4d Andy Yan 2022-04-22 2299 u32 possible_crtcs;
604be85547ce4d Andy Yan 2022-04-22 2300
604be85547ce4d Andy Yan 2022-04-22 2301 if (vop2->data->soc_id == 3566) {
604be85547ce4d Andy Yan 2022-04-22 2302 /*
604be85547ce4d Andy Yan 2022-04-22 2303 * On RK3566 these windows don't have an independent
604be85547ce4d Andy Yan 2022-04-22 2304 * framebuffer. They share the framebuffer with smart0,
604be85547ce4d Andy Yan 2022-04-22 2305 * esmart0 and cluster0 respectively.
604be85547ce4d Andy Yan 2022-04-22 2306 */
604be85547ce4d Andy Yan 2022-04-22 2307 switch (win->data->phys_id) {
604be85547ce4d Andy Yan 2022-04-22 2308 case ROCKCHIP_VOP2_SMART1:
604be85547ce4d Andy Yan 2022-04-22 2309 case ROCKCHIP_VOP2_ESMART1:
604be85547ce4d Andy Yan 2022-04-22 2310 case ROCKCHIP_VOP2_CLUSTER1:
604be85547ce4d Andy Yan 2022-04-22 2311 continue;
604be85547ce4d Andy Yan 2022-04-22 2312 }
604be85547ce4d Andy Yan 2022-04-22 2313 }
604be85547ce4d Andy Yan 2022-04-22 2314
604be85547ce4d Andy Yan 2022-04-22 2315 if (win->type == DRM_PLANE_TYPE_PRIMARY) {
604be85547ce4d Andy Yan 2022-04-22 2316 vp = find_vp_without_primary(vop2);
604be85547ce4d Andy Yan 2022-04-22 2317 if (vp) {
604be85547ce4d Andy Yan 2022-04-22 2318 possible_crtcs = BIT(nvp);
604be85547ce4d Andy Yan 2022-04-22 2319 vp->primary_plane = win;
604be85547ce4d Andy Yan 2022-04-22 2320 nvp++;
604be85547ce4d Andy Yan 2022-04-22 2321 } else {
604be85547ce4d Andy Yan 2022-04-22 2322 /* change the unused primary window to overlay window */
604be85547ce4d Andy Yan 2022-04-22 2323 win->type = DRM_PLANE_TYPE_OVERLAY;
604be85547ce4d Andy Yan 2022-04-22 2324 }
604be85547ce4d Andy Yan 2022-04-22 2325 }
604be85547ce4d Andy Yan 2022-04-22 2326
604be85547ce4d Andy Yan 2022-04-22 2327 if (win->type == DRM_PLANE_TYPE_OVERLAY)
604be85547ce4d Andy Yan 2022-04-22 2328 possible_crtcs = (1 << nvps) - 1;
What about if win->type is not equal to either DRM_PLANE_TYPE_PRIMARY or
DRM_PLANE_TYPE_OVERLAY? That's what the checker is worried about.
604be85547ce4d Andy Yan 2022-04-22 2329
604be85547ce4d Andy Yan 2022-04-22 @2330 ret = vop2_plane_init(vop2, win, possible_crtcs);
^^^^^^^^^^^^^^
604be85547ce4d Andy Yan 2022-04-22 2331 if (ret) {
604be85547ce4d Andy Yan 2022-04-22 2332 drm_err(vop2->drm, "failed to init plane %s: %d\n",
604be85547ce4d Andy Yan 2022-04-22 2333 win->data->name, ret);
604be85547ce4d Andy Yan 2022-04-22 2334 return ret;
604be85547ce4d Andy Yan 2022-04-22 2335 }
604be85547ce4d Andy Yan 2022-04-22 2336 }
604be85547ce4d Andy Yan 2022-04-22 2337
604be85547ce4d Andy Yan 2022-04-22 2338 for (i = 0; i < vop2_data->nr_vps; i++) {
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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