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drivers/disp_dev: add display driver registry

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This commit is contained in:
Alexandre Abadie 2020-06-21 18:16:21 +02:00
parent 40b5359096
commit f4bc980236
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GPG Key ID: 1C919A403CAE1405
2 changed files with 71 additions and 0 deletions
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37
drivers/disp_dev/disp_dev.c
View File

@ -21,9 +21,46 @@
#include <assert.h>
#include <stdbool.h>
#include <inttypes.h>
#include <errno.h>
#include "disp_dev.h"
disp_dev_reg_t *disp_dev_reg = NULL;
int disp_dev_reg_add(disp_dev_reg_t *dev)
{
disp_dev_reg_t *tmp = disp_dev_reg;
if (dev == NULL) {
return -ENODEV;
}
/* prepare new entry */
dev->next = NULL;
/* add to registry */
if (disp_dev_reg == NULL) {
disp_dev_reg = dev;
}
else {
while (tmp->next != NULL) {
tmp = tmp->next;
}
tmp->next = dev;
}
return 0;
}
disp_dev_reg_t *disp_dev_reg_find_screen(uint8_t screen_id)
{
disp_dev_reg_t *tmp = disp_dev_reg;
while (tmp && tmp->screen_id != screen_id) {
tmp = tmp->next;
}
return tmp;
}
void disp_dev_map(const disp_dev_t *dev,
uint16_t x1, uint16_t x2, uint16_t y1, uint16_t y2,
const uint16_t *color)

34
drivers/include/disp_dev.h
View File

@ -101,6 +101,40 @@ struct disp_dev {
const disp_dev_driver_t *driver; /**< Pointer to driver of the display device */
};
/**
* @brief Disp dev registry entry
*/
typedef struct disp_dev_reg {
struct disp_dev_reg *next; /**< pointer to the next display device in the list */
disp_dev_t *dev; /**< pointer to the device descriptor */
uint8_t screen_id; /**< id of the screen this display is attached to */
} disp_dev_reg_t;
/**
* @brief Export the display device registry as global variable
*/
extern disp_dev_reg_t *disp_dev_reg;
/**
* @brief Add pointer to a display device item to the list of display items
*
* @param[in] dev Pointer to the display device
*
* @return 0 on success
* @return -ENODEV on invalid entry
*/
int disp_dev_reg_add(disp_dev_reg_t *dev);
/**
* @brief Find the display device that is attached to a given screen
*
* @param[in] screen_id Identifier (number) of the screen
*
* @return pointer to the display device in the registry
* @return NULL if there's no match
*/
disp_dev_reg_t *disp_dev_reg_find_screen(uint8_t screen_id);
/**
* @brief Map an area to display on the device
*