diff options
| author | Michael Tretter <m.tretter@pengutronix.de> | 2023-10-06 18:07:06 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-10-09 12:06:23 +0300 |
| commit | 198e54282ae560958e64328fe8f72893661b9e8b (patch) | |
| tree | d8454b35eadeadf634c7a89e6f36f12d01c4d141 /drivers/gpu | |
| parent | 846307185f0ffbbe6b34d53b97c31c0fc392cff0 (diff) | |
| download | linux-198e54282ae560958e64328fe8f72893661b9e8b.tar.xz | |
drm/bridge: samsung-dsim: adjust porches by rounding up
Rounding the porches up instead of down fixes the samsung-dsim at
some more resolutions and refresh rates:
The following resolutions are working with rounded-up porches, but don't
work when the porches are rounded down:
1920x1080-59.94
1920x1080-30.00
1920x1080-29.97
1920x1080-25.00
1680x1050-59.88
1280x1024-75.02
1200x960-59.99
1280x720-50.00
1024x768-75.03
1024x768-60.00
640x480-60.00
640x480-59.94
Reviewed-by: Adam Ford <aford173@gmail.com> #imx8mm-beacon
Tested-by: Adam Ford <aford173@gmail.com> #imx8mm-beacon
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> # Kontron BL i.MX8MM + Waveshare 10.1inch HDMI LCD (E)
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20230818-samsung-dsim-v2-4-846603df0e0a@pengutronix.de
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230818-samsung-dsim-v2-4-846603df0e0a@pengutronix.de
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/bridge/samsung-dsim.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 60d5ab2e0989..a0310f050693 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -989,9 +989,9 @@ static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi) if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { int byte_clk_khz = dsi->hs_clock / 1000 / 8; - int hfp = (m->hsync_start - m->hdisplay) * byte_clk_khz / m->clock; - int hbp = (m->htotal - m->hsync_end) * byte_clk_khz / m->clock; - int hsa = (m->hsync_end - m->hsync_start) * byte_clk_khz / m->clock; + int hfp = DIV_ROUND_UP((m->hsync_start - m->hdisplay) * byte_clk_khz, m->clock); + int hbp = DIV_ROUND_UP((m->htotal - m->hsync_end) * byte_clk_khz, m->clock); + int hsa = DIV_ROUND_UP((m->hsync_end - m->hsync_start) * byte_clk_khz, m->clock); /* remove packet overhead when possible */ hfp = max(hfp - 6, 0); |