On Fri, 14 Feb 2025, Egor Vorontsov <sdoregor@xxxxxxxx> wrote:
> Using le16 instead of u8[2].
>
> Suggested-by: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Signed-off-by: Egor Vorontsov <sdoregor@xxxxxxxx>
The vsync and hsync having high bit indicate polarity makes this less
than perfect, but I think it's fine.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_displayid_internal.h | 18 +++++++--------
> drivers/gpu/drm/drm_edid.c | 28 ++++++++++++------------
> 2 files changed, 23 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_displayid_internal.h b/drivers/gpu/drm/drm_displayid_internal.h
> index 84831ecfdb6e..957dd0619f5c 100644
> --- a/drivers/gpu/drm/drm_displayid_internal.h
> +++ b/drivers/gpu/drm/drm_displayid_internal.h
> @@ -115,20 +115,20 @@ struct displayid_tiled_block {
> struct displayid_detailed_timings_1 {
> u8 pixel_clock[3];
> u8 flags;
> - u8 hactive[2];
> - u8 hblank[2];
> - u8 hsync[2];
> - u8 hsw[2];
> - u8 vactive[2];
> - u8 vblank[2];
> - u8 vsync[2];
> - u8 vsw[2];
> + __le16 hactive;
> + __le16 hblank;
> + __le16 hsync;
> + __le16 hsw;
> + __le16 vactive;
> + __le16 vblank;
> + __le16 vsync;
> + __le16 vsw;
> } __packed;
>
> struct displayid_detailed_timing_block {
> struct displayid_block base;
> struct displayid_detailed_timings_1 timings[];
> -};
> +} __packed;
>
> struct displayid_formula_timings_9 {
> u8 flags;
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 03edf0e1598e..32807cefc819 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -6760,23 +6760,23 @@ static void update_display_info(struct drm_connector *connector,
> }
>
> static struct drm_display_mode *drm_mode_displayid_detailed(struct drm_device *dev,
> - struct displayid_detailed_timings_1 *timings,
> + const struct displayid_detailed_timings_1 *timings,
> bool type_7)
> {
> struct drm_display_mode *mode;
> - unsigned pixel_clock = (timings->pixel_clock[0] |
> - (timings->pixel_clock[1] << 8) |
> - (timings->pixel_clock[2] << 16)) + 1;
> - unsigned hactive = (timings->hactive[0] | timings->hactive[1] << 8) + 1;
> - unsigned hblank = (timings->hblank[0] | timings->hblank[1] << 8) + 1;
> - unsigned hsync = (timings->hsync[0] | (timings->hsync[1] & 0x7f) << 8) + 1;
> - unsigned hsync_width = (timings->hsw[0] | timings->hsw[1] << 8) + 1;
> - unsigned vactive = (timings->vactive[0] | timings->vactive[1] << 8) + 1;
> - unsigned vblank = (timings->vblank[0] | timings->vblank[1] << 8) + 1;
> - unsigned vsync = (timings->vsync[0] | (timings->vsync[1] & 0x7f) << 8) + 1;
> - unsigned vsync_width = (timings->vsw[0] | timings->vsw[1] << 8) + 1;
> - bool hsync_positive = (timings->hsync[1] >> 7) & 0x1;
> - bool vsync_positive = (timings->vsync[1] >> 7) & 0x1;
> + unsigned int pixel_clock = (timings->pixel_clock[0] |
> + (timings->pixel_clock[1] << 8) |
> + (timings->pixel_clock[2] << 16)) + 1;
> + unsigned int hactive = le16_to_cpu(timings->hactive) + 1;
> + unsigned int hblank = le16_to_cpu(timings->hblank) + 1;
> + unsigned int hsync = (le16_to_cpu(timings->hsync) & 0x7fff) + 1;
> + unsigned int hsync_width = le16_to_cpu(timings->hsw) + 1;
> + unsigned int vactive = le16_to_cpu(timings->vactive) + 1;
> + unsigned int vblank = le16_to_cpu(timings->vblank) + 1;
> + unsigned int vsync = (le16_to_cpu(timings->vsync) & 0x7fff) + 1;
> + unsigned int vsync_width = le16_to_cpu(timings->vsw) + 1;
> + bool hsync_positive = le16_to_cpu(timings->hsync) & (1 << 15);
> + bool vsync_positive = le16_to_cpu(timings->vsync) & (1 << 15);
>
> mode = drm_mode_create(dev);
> if (!mode)
--
Jani Nikula, Intel
