tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b86a6a241b7c60ca7a6ca4fb3c0d2aedbbf2c1b6 commit: cdb702a655582e80139525156c57e6e48da08393 [1162/7050] drm/tiny: add support for tft displays based on ilitek,ili9486 reproduce: # apt-get install sparse # sparse version: v0.6.1-174-g094d5a94-dirty git checkout cdb702a655582e80139525156c57e6e48da08393 make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/tiny/ili9486.c:61:16: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [usertype] @@ got resunsigned short [usertype] @@ drivers/gpu/drm/tiny/ili9486.c:61:16: sparse: expected unsigned short [usertype] drivers/gpu/drm/tiny/ili9486.c:61:16: sparse: got restricted __be16 [usertype] drivers/gpu/drm/tiny/ili9486.c:71:32: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [usertype] @@ got resunsigned short [usertype] @@ drivers/gpu/drm/tiny/ili9486.c:71:32: sparse: expected unsigned short [usertype] drivers/gpu/drm/tiny/ili9486.c:71:32: sparse: got restricted __be16 [usertype] vim +61 drivers/gpu/drm/tiny/ili9486.c 35 36 /* 37 * The PiScreen/waveshare rpi-lcd-35 has a SPI to 16-bit parallel bus converter 38 * in front of the display controller. This means that 8-bit values have to be 39 * transferred as 16-bit. 40 */ 41 static int waveshare_command(struct mipi_dbi *mipi, u8 *cmd, u8 *par, 42 size_t num) 43 { 44 struct spi_device *spi = mipi->spi; 45 void *data = par; 46 u32 speed_hz; 47 int i, ret; 48 u16 *buf; 49 50 buf = kmalloc(32 * sizeof(u16), GFP_KERNEL); 51 if (!buf) 52 return -ENOMEM; 53 54 /* 55 * The displays are Raspberry Pi HATs and connected to the 8-bit only 56 * SPI controller, so 16-bit command and parameters need byte swapping 57 * before being transferred as 8-bit on the big endian SPI bus. 58 * Pixel data bytes have already been swapped before this function is 59 * called. 60 */ > 61 buf[0] = cpu_to_be16(*cmd); 62 gpiod_set_value_cansleep(mipi->dc, 0); 63 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 2); 64 ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, buf, 2); 65 if (ret || !num) 66 goto free; 67 68 /* 8-bit configuration data, not 16-bit pixel data */ 69 if (num <= 32) { 70 for (i = 0; i < num; i++) 71 buf[i] = cpu_to_be16(par[i]); 72 num *= 2; 73 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num); 74 data = buf; 75 } 76 77 gpiod_set_value_cansleep(mipi->dc, 1); 78 ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, data, num); 79 free: 80 kfree(buf); 81 82 return ret; 83 } 84 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
