[Intel-gfx] [PATCH 01/15] drm/i915/plane: warn on non-zero plane offset
Dan Carpenter
dan.carpenter at linaro.org
Mon May 29 09:24:46 UTC 2023
Hi Jani,
kernel test robot noticed the following build warnings:
url: https://github.com/intel-lab-lkp/linux/commits/Jani-Nikula/drm-i915-plane-warn-on-non-zero-plane-offset/20230527-003951
base: git://anongit.freedesktop.org/drm/drm-tip drm-tip
patch link: https://lore.kernel.org/r/0988d237e56c56568f035053da8e2e2308a17d3a.1685119007.git.jani.nikula%40intel.com
patch subject: [Intel-gfx] [PATCH 01/15] drm/i915/plane: warn on non-zero plane offset
config: x86_64-randconfig-m031-20230526 (https://download.01.org/0day-ci/archive/20230528/202305280453.8yzCMS2i-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Reported-by: Dan Carpenter <error27 at gmail.com>
| Closes: https://lore.kernel.org/r/202305280453.8yzCMS2i-lkp@intel.com/
smatch warnings:
drivers/gpu/drm/i915/display/i9xx_plane.c:1040 i9xx_get_initial_plane_config() error: uninitialized symbol 'offset'.
vim +/offset +1040 drivers/gpu/drm/i915/display/i9xx_plane.c
2a3014490cd18a Dave Airlie 2021-02-05 974 void
2a3014490cd18a Dave Airlie 2021-02-05 975 i9xx_get_initial_plane_config(struct intel_crtc *crtc,
2a3014490cd18a Dave Airlie 2021-02-05 976 struct intel_initial_plane_config *plane_config)
2a3014490cd18a Dave Airlie 2021-02-05 977 {
2a3014490cd18a Dave Airlie 2021-02-05 978 struct drm_device *dev = crtc->base.dev;
2a3014490cd18a Dave Airlie 2021-02-05 979 struct drm_i915_private *dev_priv = to_i915(dev);
2a3014490cd18a Dave Airlie 2021-02-05 980 struct intel_plane *plane = to_intel_plane(crtc->base.primary);
2a3014490cd18a Dave Airlie 2021-02-05 981 enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
2a3014490cd18a Dave Airlie 2021-02-05 982 enum pipe pipe;
2a3014490cd18a Dave Airlie 2021-02-05 983 u32 val, base, offset;
2a3014490cd18a Dave Airlie 2021-02-05 984 int fourcc, pixel_format;
2a3014490cd18a Dave Airlie 2021-02-05 985 unsigned int aligned_height;
2a3014490cd18a Dave Airlie 2021-02-05 986 struct drm_framebuffer *fb;
2a3014490cd18a Dave Airlie 2021-02-05 987 struct intel_framebuffer *intel_fb;
2a3014490cd18a Dave Airlie 2021-02-05 988
2a3014490cd18a Dave Airlie 2021-02-05 989 if (!plane->get_hw_state(plane, &pipe))
2a3014490cd18a Dave Airlie 2021-02-05 990 return;
2a3014490cd18a Dave Airlie 2021-02-05 991
2a3014490cd18a Dave Airlie 2021-02-05 992 drm_WARN_ON(dev, pipe != crtc->pipe);
2a3014490cd18a Dave Airlie 2021-02-05 993
2a3014490cd18a Dave Airlie 2021-02-05 994 intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
2a3014490cd18a Dave Airlie 2021-02-05 995 if (!intel_fb) {
2a3014490cd18a Dave Airlie 2021-02-05 996 drm_dbg_kms(&dev_priv->drm, "failed to alloc fb\n");
2a3014490cd18a Dave Airlie 2021-02-05 997 return;
2a3014490cd18a Dave Airlie 2021-02-05 998 }
2a3014490cd18a Dave Airlie 2021-02-05 999
2a3014490cd18a Dave Airlie 2021-02-05 1000 fb = &intel_fb->base;
2a3014490cd18a Dave Airlie 2021-02-05 1001
2a3014490cd18a Dave Airlie 2021-02-05 1002 fb->dev = dev;
2a3014490cd18a Dave Airlie 2021-02-05 1003
2a3014490cd18a Dave Airlie 2021-02-05 1004 val = intel_de_read(dev_priv, DSPCNTR(i9xx_plane));
2a3014490cd18a Dave Airlie 2021-02-05 1005
005e95377249cb Matt Roper 2021-03-19 1006 if (DISPLAY_VER(dev_priv) >= 4) {
428cb15d5b0031 Ville Syrjälä 2022-01-21 1007 if (val & DISP_TILED) {
2a3014490cd18a Dave Airlie 2021-02-05 1008 plane_config->tiling = I915_TILING_X;
2a3014490cd18a Dave Airlie 2021-02-05 1009 fb->modifier = I915_FORMAT_MOD_X_TILED;
2a3014490cd18a Dave Airlie 2021-02-05 1010 }
2a3014490cd18a Dave Airlie 2021-02-05 1011
428cb15d5b0031 Ville Syrjälä 2022-01-21 1012 if (val & DISP_ROTATE_180)
2a3014490cd18a Dave Airlie 2021-02-05 1013 plane_config->rotation = DRM_MODE_ROTATE_180;
2a3014490cd18a Dave Airlie 2021-02-05 1014 }
2a3014490cd18a Dave Airlie 2021-02-05 1015
2a3014490cd18a Dave Airlie 2021-02-05 1016 if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B &&
428cb15d5b0031 Ville Syrjälä 2022-01-21 1017 val & DISP_MIRROR)
2a3014490cd18a Dave Airlie 2021-02-05 1018 plane_config->rotation |= DRM_MODE_REFLECT_X;
2a3014490cd18a Dave Airlie 2021-02-05 1019
428cb15d5b0031 Ville Syrjälä 2022-01-21 1020 pixel_format = val & DISP_FORMAT_MASK;
2a3014490cd18a Dave Airlie 2021-02-05 1021 fourcc = i9xx_format_to_fourcc(pixel_format);
2a3014490cd18a Dave Airlie 2021-02-05 1022 fb->format = drm_format_info(fourcc);
2a3014490cd18a Dave Airlie 2021-02-05 1023
2a3014490cd18a Dave Airlie 2021-02-05 1024 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2a3014490cd18a Dave Airlie 2021-02-05 1025 offset = intel_de_read(dev_priv, DSPOFFSET(i9xx_plane));
428cb15d5b0031 Ville Syrjälä 2022-01-21 1026 base = intel_de_read(dev_priv, DSPSURF(i9xx_plane)) & DISP_ADDR_MASK;
005e95377249cb Matt Roper 2021-03-19 1027 } else if (DISPLAY_VER(dev_priv) >= 4) {
2a3014490cd18a Dave Airlie 2021-02-05 1028 if (plane_config->tiling)
2a3014490cd18a Dave Airlie 2021-02-05 1029 offset = intel_de_read(dev_priv,
2a3014490cd18a Dave Airlie 2021-02-05 1030 DSPTILEOFF(i9xx_plane));
2a3014490cd18a Dave Airlie 2021-02-05 1031 else
2a3014490cd18a Dave Airlie 2021-02-05 1032 offset = intel_de_read(dev_priv,
2a3014490cd18a Dave Airlie 2021-02-05 1033 DSPLINOFF(i9xx_plane));
428cb15d5b0031 Ville Syrjälä 2022-01-21 1034 base = intel_de_read(dev_priv, DSPSURF(i9xx_plane)) & DISP_ADDR_MASK;
2a3014490cd18a Dave Airlie 2021-02-05 1035 } else {
2a3014490cd18a Dave Airlie 2021-02-05 1036 base = intel_de_read(dev_priv, DSPADDR(i9xx_plane));
offset not initialized on this path.
2a3014490cd18a Dave Airlie 2021-02-05 1037 }
2a3014490cd18a Dave Airlie 2021-02-05 1038 plane_config->base = base;
2a3014490cd18a Dave Airlie 2021-02-05 1039
40c3d9e9221e23 Jani Nikula 2023-05-26 @1040 drm_WARN_ON(&dev_priv->drm, offset != 0);
--
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