tree: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next head: 40f98db5c06081ce583a24fb8950367f1058d2a3 commit: dc6fcaaba5a5411237d042a26c4d46689f3346bb [7/10] drm/omap: Allow build with COMPILE_TEST=y config: mips-randconfig-r133-20240528 (https://download.01.org/0day-ci/archive/20240528/202405280709.9vMmDoGt-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce: (https://download.01.org/0day-ci/archive/20240528/202405280709.9vMmDoGt-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202405280709.9vMmDoGt-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:122:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *mem @@ got unsigned int [usertype] *wa_dma_data @@ drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:122:25: sparse: expected void const volatile [noderef] __iomem *mem drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:122:25: sparse: got unsigned int [usertype] *wa_dma_data >> drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:130:24: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got unsigned int [usertype] *wa_dma_data @@ drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:130:24: sparse: expected void volatile [noderef] __iomem *mem drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:130:24: sparse: got unsigned int [usertype] *wa_dma_data >> drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:414:19: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *mem @@ got unsigned int * @@ drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:414:19: sparse: expected void const volatile [noderef] __iomem *mem drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:414:19: sparse: got unsigned int * vim +122 drivers/gpu/drm/omapdrm/omap_dmm_tiler.c f5b9930b85dc631 Tomi Valkeinen 2018-09-26 101 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 102 static u32 dmm_read_wa(struct dmm *dmm, u32 reg) f5b9930b85dc631 Tomi Valkeinen 2018-09-26 103 { f5b9930b85dc631 Tomi Valkeinen 2018-09-26 104 dma_addr_t src, dst; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 105 int r; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 106 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 107 src = dmm->phys_base + reg; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 108 dst = dmm->wa_dma_handle; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 109 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 110 r = dmm_dma_copy(dmm, src, dst); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 111 if (r) { f5b9930b85dc631 Tomi Valkeinen 2018-09-26 112 dev_err(dmm->dev, "sDMA read transfer timeout\n"); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 113 return readl(dmm->base + reg); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 114 } f5b9930b85dc631 Tomi Valkeinen 2018-09-26 115 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 116 /* f5b9930b85dc631 Tomi Valkeinen 2018-09-26 117 * As per i878 workaround, the DMA is used to access the DMM registers. f5b9930b85dc631 Tomi Valkeinen 2018-09-26 118 * Make sure that the readl is not moved by the compiler or the CPU f5b9930b85dc631 Tomi Valkeinen 2018-09-26 119 * earlier than the DMA finished writing the value to memory. f5b9930b85dc631 Tomi Valkeinen 2018-09-26 120 */ f5b9930b85dc631 Tomi Valkeinen 2018-09-26 121 rmb(); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 @122 return readl(dmm->wa_dma_data); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 123 } f5b9930b85dc631 Tomi Valkeinen 2018-09-26 124 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 125 static void dmm_write_wa(struct dmm *dmm, u32 val, u32 reg) f5b9930b85dc631 Tomi Valkeinen 2018-09-26 126 { f5b9930b85dc631 Tomi Valkeinen 2018-09-26 127 dma_addr_t src, dst; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 128 int r; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 129 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 @130 writel(val, dmm->wa_dma_data); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 131 /* f5b9930b85dc631 Tomi Valkeinen 2018-09-26 132 * As per i878 workaround, the DMA is used to access the DMM registers. f5b9930b85dc631 Tomi Valkeinen 2018-09-26 133 * Make sure that the writel is not moved by the compiler or the CPU, so f5b9930b85dc631 Tomi Valkeinen 2018-09-26 134 * the data will be in place before we start the DMA to do the actual f5b9930b85dc631 Tomi Valkeinen 2018-09-26 135 * register write. f5b9930b85dc631 Tomi Valkeinen 2018-09-26 136 */ f5b9930b85dc631 Tomi Valkeinen 2018-09-26 137 wmb(); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 138 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 139 src = dmm->wa_dma_handle; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 140 dst = dmm->phys_base + reg; f5b9930b85dc631 Tomi Valkeinen 2018-09-26 141 f5b9930b85dc631 Tomi Valkeinen 2018-09-26 142 r = dmm_dma_copy(dmm, src, dst); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 143 if (r) { f5b9930b85dc631 Tomi Valkeinen 2018-09-26 144 dev_err(dmm->dev, "sDMA write transfer timeout\n"); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 145 writel(val, dmm->base + reg); f5b9930b85dc631 Tomi Valkeinen 2018-09-26 146 } f5b9930b85dc631 Tomi Valkeinen 2018-09-26 147 } f5b9930b85dc631 Tomi Valkeinen 2018-09-26 148 :::::: The code at line 122 was first introduced by commit :::::: f5b9930b85dc6319fd6bcc259e447eff62fc691c drm/omap: partial workaround for DRA7xx DMM errata i878 :::::: TO: Tomi Valkeinen <tomi.valkeinen@xxxxxx> :::::: CC: Tomi Valkeinen <tomi.valkeinen@xxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
