Add constants for the various commands that the driver can send to the device and update the respective helper functions. No functional changes.
Signed-off-by: Thomas Zimmermann <[email protected]> Reviewed-by: Javier Martinez Canillas <[email protected]> --- drivers/gpu/drm/udl/udl_drv.h | 10 ---------- drivers/gpu/drm/udl/udl_modeset.c | 16 +++++++++------- drivers/gpu/drm/udl/udl_proto.h | 15 +++++++++++++++ drivers/gpu/drm/udl/udl_transfer.c | 7 ++++--- 4 files changed, 28 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h index 580989087c54..282ebd6c02fd 100644 --- a/drivers/gpu/drm/udl/udl_drv.h +++ b/drivers/gpu/drm/udl/udl_drv.h @@ -102,14 +102,4 @@ int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr, int udl_drop_usb(struct drm_device *dev); int udl_select_std_channel(struct udl_device *udl); -#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */ -#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */ -#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */ -#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */ - -#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */ -#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */ -#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */ -#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */ - #endif diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c index 4462653e6736..3a25f3fc2b22 100644 --- a/drivers/gpu/drm/udl/udl_modeset.c +++ b/drivers/gpu/drm/udl/udl_modeset.c @@ -29,15 +29,17 @@ #include "udl_proto.h" /* - * All DisplayLink bulk operations start with 0xAF, followed by specific code - * All operations are written to buffers which then later get sent to device + * All DisplayLink bulk operations start with 0xaf (UDL_MSG_BULK), followed by + * a specific command code. All operations are written to a command buffer, which + * the driver sends to the device. */ static char *udl_set_register(char *buf, u8 reg, u8 val) { - *buf++ = 0xAF; - *buf++ = 0x20; + *buf++ = UDL_MSG_BULK; + *buf++ = UDL_CMD_WRITEREG; *buf++ = reg; *buf++ = val; + return buf; } @@ -179,8 +181,8 @@ static char *udl_set_display_mode(char *buf, struct drm_display_mode *mode) static char *udl_dummy_render(char *wrptr) { - *wrptr++ = 0xAF; - *wrptr++ = 0x6A; /* copy */ + *wrptr++ = UDL_MSG_BULK; + *wrptr++ = UDL_CMD_WRITECOPY16; *wrptr++ = 0x00; /* from addr */ *wrptr++ = 0x00; *wrptr++ = 0x00; @@ -235,7 +237,7 @@ static int udl_handle_damage(struct drm_framebuffer *fb, /* Send partial buffer remaining before exiting */ int len; if (cmd < (char *)urb->transfer_buffer + urb->transfer_buffer_length) - *cmd++ = 0xAF; + *cmd++ = UDL_MSG_BULK; len = cmd - (char *)urb->transfer_buffer; ret = udl_submit_urb(dev, urb, len); } else { diff --git a/drivers/gpu/drm/udl/udl_proto.h b/drivers/gpu/drm/udl/udl_proto.h index 8f143e75e797..c92d2109584c 100644 --- a/drivers/gpu/drm/udl/udl_proto.h +++ b/drivers/gpu/drm/udl/udl_proto.h @@ -5,6 +5,21 @@ #include <linux/bits.h> +#define UDL_MSG_BULK 0xaf + +/* Register access */ +#define UDL_CMD_WRITEREG 0x20 /* See register constants below */ + +/* Framebuffer access */ +#define UDL_CMD_WRITERAW8 0x60 /* 8 bit raw write command. */ +#define UDL_CMD_WRITERL8 0x61 /* 8 bit run length command. */ +#define UDL_CMD_WRITECOPY8 0x62 /* 8 bit copy command. */ +#define UDL_CMD_WRITERLX8 0x63 /* 8 bit extended run length command. */ +#define UDL_CMD_WRITERAW16 0x68 /* 16 bit raw write command. */ +#define UDL_CMD_WRITERL16 0x69 /* 16 bit run length command. */ +#define UDL_CMD_WRITECOPY16 0x6a /* 16 bit copy command. */ +#define UDL_CMD_WRITERLX16 0x6b /* 16 bit extended run length command. */ + /* Color depth */ #define UDL_REG_COLORDEPTH 0x00 #define UDL_COLORDEPTH_16BPP 0 diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index b57844632dbd..5ff1037a3453 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -10,6 +10,7 @@ #include <asm/unaligned.h> #include "udl_drv.h" +#include "udl_proto.h" #define MAX_CMD_PIXELS 255 @@ -89,8 +90,8 @@ static void udl_compress_hline16( const u8 *cmd_pixel_start, *cmd_pixel_end = NULL; uint16_t pixel_val16; - *cmd++ = 0xaf; - *cmd++ = 0x6b; + *cmd++ = UDL_MSG_BULK; + *cmd++ = UDL_CMD_WRITERLX16; *cmd++ = (uint8_t) ((dev_addr >> 16) & 0xFF); *cmd++ = (uint8_t) ((dev_addr >> 8) & 0xFF); *cmd++ = (uint8_t) ((dev_addr) & 0xFF); @@ -152,7 +153,7 @@ static void udl_compress_hline16( if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) { /* Fill leftover bytes with no-ops */ if (cmd_buffer_end > cmd) - memset(cmd, 0xAF, cmd_buffer_end - cmd); + memset(cmd, UDL_MSG_BULK, cmd_buffer_end - cmd); cmd = (uint8_t *) cmd_buffer_end; } -- 2.37.3
