Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Thomas Zimmermann | 469 | 53.17% | 23 | 88.46% |
Dave Airlie | 247 | 28.00% | 1 | 3.85% |
Y.C. Chen | 164 | 18.59% | 1 | 3.85% |
Daniel Vetter | 2 | 0.23% | 1 | 3.85% |
Total | 882 | 26 |
// SPDX-License-Identifier: MIT /* * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. */ #include <linux/i2c-algo-bit.h> #include <linux/i2c.h> #include <drm/drm_managed.h> #include <drm/drm_print.h> #include "ast_ddc.h" #include "ast_drv.h" struct ast_ddc { struct ast_device *ast; struct i2c_algo_bit_data bit; struct i2c_adapter adapter; }; static void ast_ddc_algo_bit_data_setsda(void *data, int state) { struct ast_ddc *ddc = data; struct ast_device *ast = ddc->ast; int i; u8 ujcrb7, jtemp; for (i = 0; i < 0x10000; i++) { ujcrb7 = ((state & 0x01) ? 0 : 1) << 2; ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0xf1, ujcrb7); jtemp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x04); if (ujcrb7 == jtemp) break; } } static void ast_ddc_algo_bit_data_setscl(void *data, int state) { struct ast_ddc *ddc = data; struct ast_device *ast = ddc->ast; int i; u8 ujcrb7, jtemp; for (i = 0; i < 0x10000; i++) { ujcrb7 = ((state & 0x01) ? 0 : 1); ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0xf4, ujcrb7); jtemp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x01); if (ujcrb7 == jtemp) break; } } static int ast_ddc_algo_bit_data_pre_xfer(struct i2c_adapter *adapter) { struct ast_ddc *ddc = i2c_get_adapdata(adapter); struct ast_device *ast = ddc->ast; /* * Protect access to I/O registers from concurrent modesetting * by acquiring the I/O-register lock. */ mutex_lock(&ast->modeset_lock); return 0; } static void ast_ddc_algo_bit_data_post_xfer(struct i2c_adapter *adapter) { struct ast_ddc *ddc = i2c_get_adapdata(adapter); struct ast_device *ast = ddc->ast; mutex_unlock(&ast->modeset_lock); } static int ast_ddc_algo_bit_data_getsda(void *data) { struct ast_ddc *ddc = data; struct ast_device *ast = ddc->ast; uint32_t val, val2, count, pass; count = 0; pass = 0; val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; do { val2 = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; if (val == val2) { pass++; } else { pass = 0; val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; } } while ((pass < 5) && (count++ < 0x10000)); return val & 1 ? 1 : 0; } static int ast_ddc_algo_bit_data_getscl(void *data) { struct ast_ddc *ddc = data; struct ast_device *ast = ddc->ast; uint32_t val, val2, count, pass; count = 0; pass = 0; val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; do { val2 = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; if (val == val2) { pass++; } else { pass = 0; val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; } } while ((pass < 5) && (count++ < 0x10000)); return val & 1 ? 1 : 0; } static void ast_ddc_release(struct drm_device *dev, void *res) { struct ast_ddc *ddc = res; i2c_del_adapter(&ddc->adapter); } struct i2c_adapter *ast_ddc_create(struct ast_device *ast) { struct drm_device *dev = &ast->base; struct ast_ddc *ddc; struct i2c_adapter *adapter; struct i2c_algo_bit_data *bit; int ret; ddc = drmm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL); if (!ddc) return ERR_PTR(-ENOMEM); ddc->ast = ast; bit = &ddc->bit; bit->data = ddc; bit->setsda = ast_ddc_algo_bit_data_setsda; bit->setscl = ast_ddc_algo_bit_data_setscl; bit->getsda = ast_ddc_algo_bit_data_getsda; bit->getscl = ast_ddc_algo_bit_data_getscl; bit->pre_xfer = ast_ddc_algo_bit_data_pre_xfer; bit->post_xfer = ast_ddc_algo_bit_data_post_xfer; bit->udelay = 20; bit->timeout = usecs_to_jiffies(2200); adapter = &ddc->adapter; adapter->owner = THIS_MODULE; adapter->algo_data = bit; adapter->dev.parent = dev->dev; snprintf(adapter->name, sizeof(adapter->name), "AST DDC bus"); i2c_set_adapdata(adapter, ddc); ret = i2c_bit_add_bus(adapter); if (ret) { drm_err(dev, "Failed to register bit i2c\n"); return ERR_PTR(ret); } ret = drmm_add_action_or_reset(dev, ast_ddc_release, ddc); if (ret) return ERR_PTR(ret); return &ddc->adapter; }
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