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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>
This commit is contained in:
Andrzej Hajda 2017-09-29 12:05:40 +02:00 committed by Inki Dae
parent acc8bf040c
commit 36fd887acb
1 changed files with 15 additions and 2 deletions
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17
drivers/gpu/drm/exynos/exynos_hdmi.c
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@ -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);