On OMAP4 and OMAP5 ES1.0 the HDMI_WP_VIDEO_TIMING_H:HSW field is set directly to the HSW value. On later SoCs the field needs to be programmed with the value of HSW-1.
Currently the driver always programs the field with the HSW value. Most videomodes seem to work fine with that, but at least low resolution interlaced modes don't work at all.
This patch fixes the HSW for OMAP5 ES2.0+ SoCs.
Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- drivers/gpu/drm/omapdrm/dss/hdmi_wp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi_wp.c b/drivers/gpu/drm/omapdrm/dss/hdmi_wp.c index 7c544bc56fb5..48ffb39663c8 100644 --- a/drivers/gpu/drm/omapdrm/dss/hdmi_wp.c +++ b/drivers/gpu/drm/omapdrm/dss/hdmi_wp.c @@ -165,12 +165,24 @@ void hdmi_wp_video_config_timing(struct hdmi_wp_data *wp, { u32 timing_h = 0; u32 timing_v = 0; + bool hsw_minus_one = true;
DSSDBG("Enter hdmi_wp_video_config_timing\n");
+ /* + * On OMAP4 and OMAP5 ES1 the HSW field is programmed as is. On OMAP5 + * ES2+ (including DRA7/AM5 SoCs) HSW field is programmed to hsw-1. + * However, we don't support OMAP5 ES1 at all, so we can just check for + * OMAP4 here. + */ + if (omapdss_get_version() == OMAPDSS_VER_OMAP4430_ES1 || + omapdss_get_version() == OMAPDSS_VER_OMAP4430_ES2 || + omapdss_get_version() == OMAPDSS_VER_OMAP4) + hsw_minus_one = false; + timing_h |= FLD_VAL(timings->hbp, 31, 20); timing_h |= FLD_VAL(timings->hfp, 19, 8); - timing_h |= FLD_VAL(timings->hsw, 7, 0); + timing_h |= FLD_VAL(timings->hsw - (hsw_minus_one ? 1 : 0), 7, 0); hdmi_write_reg(wp->base, HDMI_WP_VIDEO_TIMING_H, timing_h);
timing_v |= FLD_VAL(timings->vbp, 31, 20);