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authorAndrzej Hajda <a.hajda@samsung.com>2017-09-29 12:05:40 +0200
committerInki Dae <inki.dae@samsung.com>2017-10-26 09:06:33 +0900
commit36fd887acbd1ce349eba8283d9e8a9d7932a24ca (patch)
tree7be233ed99d03cdff27ff6763d1a1cd5a0999ca5 /drivers/gpu/drm/exynos
parentacc8bf040c39499139e6d26e72c642d42ffa5016 (diff)
drm/exynos/hdmi: quirk for support mode timings conversion
MIXER in SoCs prior to Exynos5420 supports only 4 video modes: 720x480, 720x576, 1280x720, 1920x1080. Support for other modes can be enabled by manipulating timings of HDMI. To do it adjusted_mode should contain actual mode set on crtc. With this patch it is possible to enable 1024x768 and 1280x1024 modes in MIXER. Suggested-by: Daniel Drake <drake@endlessm.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos')
-rw-r--r--drivers/gpu/drm/exynos/exynos_hdmi.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 0d37d6928623..218914339cac 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1247,6 +1247,18 @@ static void hdmi_v13_mode_apply(struct hdmi_context *hdata)
static void hdmi_v14_mode_apply(struct hdmi_context *hdata)
{
struct drm_display_mode *m = &hdata->encoder.crtc->state->mode;
+ struct drm_display_mode *am =
+ &hdata->encoder.crtc->state->adjusted_mode;
+ int hquirk = 0;
+
+ /*
+ * In case video mode coming from CRTC differs from requested one HDMI
+ * sometimes is able to almost properly perform conversion - only
+ * first line is distorted.
+ */
+ if ((m->vdisplay != am->vdisplay) &&
+ (m->hdisplay == 1280 || m->hdisplay == 1024))
+ hquirk = 258;
hdmi_reg_writev(hdata, HDMI_H_BLANK_0, 2, m->htotal - m->hdisplay);
hdmi_reg_writev(hdata, HDMI_V_LINE_0, 2, m->vtotal);
@@ -1340,8 +1352,9 @@ static void hdmi_v14_mode_apply(struct hdmi_context *hdata)
hdmi_reg_writev(hdata, HDMI_V_SYNC_LINE_AFT_PXL_6_0, 2, 0xffff);
hdmi_reg_writev(hdata, HDMI_TG_H_FSZ_L, 2, m->htotal);
- hdmi_reg_writev(hdata, HDMI_TG_HACT_ST_L, 2, m->htotal - m->hdisplay);
- hdmi_reg_writev(hdata, HDMI_TG_HACT_SZ_L, 2, m->hdisplay);
+ hdmi_reg_writev(hdata, HDMI_TG_HACT_ST_L, 2,
+ m->htotal - m->hdisplay - hquirk);
+ hdmi_reg_writev(hdata, HDMI_TG_HACT_SZ_L, 2, m->hdisplay + hquirk);
hdmi_reg_writev(hdata, HDMI_TG_V_FSZ_L, 2, m->vtotal);
if (hdata->drv_data == &exynos5433_hdmi_driver_data)
hdmi_reg_writeb(hdata, HDMI_TG_DECON_EN, 1);