diff options
| author | Stefan Eichenberger <stefan.eichenberger@toradex.com> | 2023-01-27 15:06:14 +0100 |
|---|---|---|
| committer | Stefan Eichenberger <eichest@gmail.com> | 2023-01-28 13:16:48 +0100 |
| commit | c0ee0193808bd52d4a518e47434c390f7904aa7f (patch) | |
| tree | 96898b4d20a8c01cc758b318c8a667d8a78b2bb0 /drivers | |
| parent | 268a9b96225ebd3bbf9352ee750ca45f7db8c99d (diff) | |
drm/imx: lcdif: crtc increase pixel clock tolerance to 10%
Set a pixel clock tolerance of 10% for the DSI interface of the i.MX 8MM
SoCs. There are some resolutions e.g. 1280x1024@60 Hz that do not work
without this commit.
Upstream-Status: Pending
This driver is not upstream and probably never will. It looks like the
function will become part of mxsfb. They don't verify the pixel clock
frequency there.
Related-to: ELB-4728
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/imx/lcdif/lcdif-crtc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/imx/lcdif/lcdif-crtc.c b/drivers/gpu/drm/imx/lcdif/lcdif-crtc.c index 195555343158..ee53652f68ef 100644 --- a/drivers/gpu/drm/imx/lcdif/lcdif-crtc.c +++ b/drivers/gpu/drm/imx/lcdif/lcdif-crtc.c @@ -255,7 +255,9 @@ static enum drm_mode_status lcdif_crtc_mode_valid(struct drm_crtc *crtc, check_pix_clk: rate = lcdif_pix_clk_round_rate(lcdif, mode->clock * 1000); - if (rate <= 0 || rate != mode->clock * 1000) + /* allow +/-10% pixel clock rate shift */ + if (rate < mode->clock * 900 || + rate > mode->clock * 1100) return MODE_BAD; return MODE_OK; |