tree: git://people.freedesktop.org/~agd5f/linux.git drm-next-4.19-wip head: d9d75cfdd854593351f7537b2c0f57aaaa39304e commit: 2b6199a1d1b70fccd62aed961ba4c2b979ae499c [10/60] drm/amd/display: replace msleep with udelay in fbc path
smatch warnings: drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_compressor.c:150 wait_for_fbc_state_changed() warn: always true condition '(counter < 1000) => (0-255 < 1000)' drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_compressor.c:150 wait_for_fbc_state_changed() warn: always true condition '(counter < 1000) => (0-255 < 1000)'
vim +150 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_compressor.c
141 142 static void wait_for_fbc_state_changed( 143 struct dce110_compressor *cp110, 144 bool enabled) 145 { 146 uint8_t counter = 0; 147 uint32_t addr = mmFBC_STATUS; 148 uint32_t value; 149
150 while (counter < 1000) {
151 value = dm_read_reg(cp110->base.ctx, addr); 152 if (get_reg_field_value( 153 value, 154 FBC_STATUS, 155 FBC_ENABLE_STATUS) == enabled) 156 break; 157 udelay(100); 158 counter++; 159 } 160 161 if (counter == 10) { 162 DC_LOG_WARNING("%s: wait counter exceeded, changes to HW not applied", 163 __func__); 164 } else { 165 DC_LOG_SYNC("FBC status changed to %d", enabled); 166 } 167 168
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