On 25.09.24 16:34, Sascha Hauer wrote:
> struct fbc_priv has rows and cols fields, but they do not actually
> store the rows and columns, but instead the actual values minus one.
> Change this to make the code better understandable.
>
> Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fat...@pengutronix.de>
> ---
> drivers/video/fbconsole.c | 24 ++++++++++++------------
> 1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/video/fbconsole.c b/drivers/video/fbconsole.c
> index d3615bc07f..01a091d07a 100644
> --- a/drivers/video/fbconsole.c
> +++ b/drivers/video/fbconsole.c
> @@ -200,7 +200,7 @@ static void printchar(struct fbc_priv *priv, int c)
> if (priv->x > 0) {
> priv->x--;
> } else if (priv->y > 0) {
> - priv->x = priv->cols;
> + priv->x = priv->cols - 1;
> priv->y--;
> }
> break;
> @@ -226,26 +226,26 @@ static void printchar(struct fbc_priv *priv, int c)
> priv->font->width, priv->font->height);
>
> priv->x++;
> - if (priv->x > priv->cols) {
> + if (priv->x >= priv->cols) {
> priv->y++;
> priv->x = 0;
> }
> }
>
> - if (priv->y > priv->rows) {
> + if (priv->y >= priv->rows) {
> void *buf;
> void *adr;
> u32 line_length = priv->fb->line_length;
> int line_height = line_length * priv->font->height;
> int width = priv->fb->xres - priv->margin.left -
> priv->margin.right;
> - int height = (priv->rows + 1) * priv->font->height;
> + int height = priv->rows * priv->font->height;
>
> buf = gui_screen_render_buffer(priv->sc);
> adr = buf + priv->margin.top * line_length;
>
> if (!priv->margin.left && !priv->margin.right) {
> - memcpy(adr, adr + line_height, line_height *
> priv->rows);
> - memset(adr + line_height * priv->rows, 0, line_height);
> + memcpy(adr, adr + line_height, line_height *
> (priv->rows - 1));
> + memset(adr + line_height * (priv->rows - 1), 0,
> line_height);
> } else {
> int bpp = priv->fb->bits_per_pixel >> 3;
> int y;
> @@ -264,7 +264,7 @@ static void printchar(struct fbc_priv *priv, int c)
>
> gu_screen_blit_area(priv->sc, priv->margin.left,
> priv->margin.top,
> width, height);
> - priv->y = priv->rows;
> + priv->y = priv->rows - 1;
> }
>
> show_cursor(priv, priv->x, priv->y);
> @@ -364,10 +364,10 @@ static void fbc_parse_csi(struct fbc_priv *priv)
> show_cursor(priv, priv->x, priv->y);
>
> pos = simple_strtoul(priv->csi, &end, 10);
> - priv->y = clamp(pos - 1, 0, (int) priv->rows);
> + priv->y = clamp(pos - 1, 0, (int) priv->rows - 1);
>
> pos = simple_strtoul(end + 1, NULL, 10);
> - priv->x = clamp(pos - 1, 0, (int) priv->cols);
> + priv->x = clamp(pos - 1, 0, (int) priv->cols - 1);
>
> show_cursor(priv, priv->x, priv->y);
> case 'K':
> @@ -469,8 +469,8 @@ static int setup_font(struct fbc_priv *priv)
>
> priv->font = font;
>
> - priv->rows = height / priv->font->height - 1;
> - priv->cols = width / priv->font->width - 1;
> + priv->rows = height / priv->font->height;
> + priv->cols = width / priv->font->width;
>
> return 0;
> }
> @@ -495,7 +495,7 @@ static int fbc_open(struct console_device *cdev)
> priv->state = LIT;
>
> dev_info(priv->cdev.dev, "framebuffer console %dx%d activated\n",
> - priv->cols + 1, priv->rows + 1);
> + priv->cols, priv->rows);
>
> priv->active = true;
>
>
--
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