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i965: register names

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This commit is contained in:
K. Lange 2021-06-03 21:50:32 +09:00
parent d5f3a41675
commit 2b40fe9551
1 changed files with 19 additions and 11 deletions
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30
kernel/video/i965.c
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@ -6,6 +6,14 @@
#include <kernel/vfs.h>
#include <kernel/args.h>
#define REG_PIPEASRC 0x6001C
#define REG_PIPEACONF 0x70008
#define PIPEACONF_ENABLE (1 << 31)
#define PIPEACONF_STATE (1 << 30)
#define REG_DSPALINOFF 0x70184
#define REG_DSPASTRIDE 0x70188
#define REG_DSPASURF 0x7019c
extern uint32_t lfb_resolution_s;
extern fs_node_t * lfb_device;
static uintptr_t ctrl_regs = 0;
@ -34,28 +42,28 @@ static void setup_framebuffer(uint32_t pcidev) {
ctrl_regs = (uintptr_t)mmu_map_mmio_region(ctrl_space, ctrl_size);
/* Disable pipe A while we update source size */
uint32_t pipe = i965_mmio_read(0x70008);
i965_mmio_write(0x70008, pipe & ~(1 << 31));
while (i965_mmio_read(0x70008) & (1 << 30));
uint32_t pipe = i965_mmio_read(REG_PIPEACONF);
i965_mmio_write(REG_PIPEACONF, pipe & ~PIPEACONF_ENABLE);
while (i965_mmio_read(REG_PIPEACONF) & PIPEACONF_STATE);
/* Set source size */
i965_mmio_write(0x6001c, ((1440 - 1) << 16) | (900 - 1));
i965_mmio_write(REG_PIPEASRC, ((1440 - 1) << 16) | (900 - 1));
/* Re-enable pipe */
pipe = i965_mmio_read(0x70008);
i965_mmio_write(0x70008, pipe | (1 << 31));
while (!(i965_mmio_read(0x70008) & (1 << 30)));
pipe = i965_mmio_read(REG_PIPEACONF);
i965_mmio_write(REG_PIPEACONF, pipe | PIPEACONF_ENABLE);
while (!(i965_mmio_read(REG_PIPEACONF) & PIPEACONF_STATE));
/* Keep the plane enabled while we update stride value */
i965_mmio_write(0x70184, 0);
i965_mmio_write(0x70188, 1440 * 4);
i965_mmio_write(0x7019c, 0);
i965_mmio_write(REG_DSPALINOFF, 0); /* offset to default of 0 */
i965_mmio_write(REG_DSPASTRIDE, 1440 * 4); /* stride to 4 x width */
i965_mmio_write(REG_DSPASURF, 0); /* write to surface address triggers change; use default of 0 */
/* Update the values we expose to userspace. */
lfb_resolution_x = 1440;
lfb_resolution_y = 900;
lfb_resolution_b = 32;
lfb_resolution_s = i965_mmio_read(0x70188);
lfb_resolution_s = i965_mmio_read(REG_DSPASTRIDE);
lfb_device->length = lfb_resolution_s * lfb_resolution_y;
}