Hey Dave,

Do we care about these warnings? I'm not sure how to get around them.

thanks, Chris

P.S, this is my last day at Matrox, but I'll maintain it from another email.

On Fri, Jun 21 2013, kbuild test robot fengguang.wu@intel.com wrote:

tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next master head: 849aa58856855ae73d9654b2e675f2c7a6ad4c9b commit: a080db9fdda77ffaa43679d21b4bd78ead0cf9e1 drm/mgag200: Hardware cursor support date: 4 days ago

sparse warnings: (new ones prefixed by >>)

...

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drivers/gpu/drm/mgag200/mgag200_cursor.c:134:57: sparse: incorrect type in argument 1 (different address spaces)

drivers/gpu/drm/mgag200/mgag200_cursor.c:134:57: expected void [noderef] asn:2*<noident> drivers/gpu/drm/mgag200/mgag200_cursor.c:134:57: got void *

...

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drivers/gpu/drm/mgag200/mgag200_cursor.c:200:65: sparse: incorrect type in argument 1 (different address spaces)

drivers/gpu/drm/mgag200/mgag200_cursor.c:200:65: expected void [noderef] asn:2*<noident> drivers/gpu/drm/mgag200/mgag200_cursor.c:200:65: got void *

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drivers/gpu/drm/mgag200/mgag200_cursor.c:218:55: sparse: incorrect type in argument 1 (different address spaces)

drivers/gpu/drm/mgag200/mgag200_cursor.c:218:55: expected void volatile [noderef] asn:2*dst drivers/gpu/drm/mgag200/mgag200_cursor.c:218:55: got void *

vim +134 drivers/gpu/drm/mgag200/mgag200_cursor.c

128 } 129 } 130 131 memset(&colour_set[0], 0, sizeof(uint32_t)*16); 132 /* width*height*4 = 16384 */ 133 for (i = 0; i < 16384; i += 4) {

...

134 this_colour = ioread32(bo->kmap.virtual + i);

135 /* No transparency */ 136 if (this_colour>>24 != 0xff && 137 this_colour>>24 != 0x0) { 138 if (warn_transparent) { 139 dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n"); 140 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n"); 141 warn_transparent = false; /* Only tell the user once. */ 142 } 143 ret = -EINVAL; 144 goto out3; 145 } 146 /* Don't need to store transparent pixels as colours */ 147 if (this_colour>>24 == 0x0) 148 continue; 149 found = false; 150 for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) { 151 if (*palette_iter == this_colour) { 152 found = true; 153 break; 154 } 155 } 156 if (found) 157 continue; 158 /* We only support 4bit paletted cursors */ 159 if (colour_count >= 16) { 160 if (warn_palette) { 161 dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n"); 162 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n"); 163 warn_palette = false; /* Only tell the user once. */ 164 } 165 ret = -EINVAL; 166 goto out3; 167 } 168 *next_space = this_colour; 169 next_space++; 170 colour_count++; 171 } 172 173 /* Program colours from cursor icon into palette */ 174 for (i = 0; i < colour_count; i++) { 175 if (i <= 2) 176 reg_index = 0x8 + i*0x4; 177 else 178 reg_index = 0x60 + i*0x3; 179 WREG_DAC(reg_index, colour_set[i] & 0xff); 180 WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff); 181 WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff); 182 BUG_ON((colour_set[i]>>24 & 0xff) != 0xff); 183 } 184 185 /* Map up-coming buffer to write colour indices */ 186 if (!pixels_prev->kmap.virtual) { 187 ret = ttm_bo_kmap(&pixels_prev->bo, 0, 188 pixels_prev->bo.num_pages, 189 &pixels_prev->kmap); 190 if (ret) { 191 dev_err(&dev->pdev->dev, "failed to kmap cursor updates\n"); 192 goto out3; 193 } 194 } 195 196 /* now write colour indices into hardware cursor buffer */ 197 for (row = 0; row < 64; row++) { 198 memset(&this_row[0], 0, 48); 199 for (col = 0; col < 64; col++) { 200 this_colour = ioread32(bo->kmap.virtual + 4*(col + 64*row)); 201 /* write transparent pixels */ 202 if (this_colour>>24 == 0x0) { 203 this_row[47 - col/8] |= 0x80>>(col%8); 204 continue; 205 } 206 207 /* write colour index here */ 208 for (i = 0; i < colour_count; i++) { 209 if (colour_set[i] == this_colour) { 210 if (col % 2) 211 this_row[col/2] |= i<<4; 212 else 213 this_row[col/2] |= i; 214 break; 215 } 216 } 217 } 218 memcpy_toio(pixels_prev->kmap.virtual + row*48, &this_row[0], 48); 219 } 220 221 /* Program gpu address of cursor buffer */

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