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Subject[PATCH v3 5/6] drm: atmel-hlcdc: prefer a lower pixel-clock than requested
Date
From: Peter Rosin <peda@axentia.se>

The intention was to only select a higher pixel-clock rate than the
requested, if a slight overclocking would result in a rate significantly
closer to the requested rate than if the conservative lower pixel-clock
rate is selected. The fixed patch has the logic the other way around and
actually prefers the higher frequency. Fix that.

Fixes: f6f7ad323461 ("drm/atmel-hlcdc: allow selecting a higher pixel-clock than requested")
Reported-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 721fa88bf71d..10985134ce0b 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -121,8 +121,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
int div_low = prate / mode_rate;

if (div_low >= 2 &&
- ((prate / div_low - mode_rate) <
- 10 * (mode_rate - prate / div)))
+ (10 * (prate / div_low - mode_rate) <
+ (mode_rate - prate / div)))
/*
* At least 10 times better when using a higher
* frequency than requested, instead of a lower.
--
2.7.4
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