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From 16349a9b271d331a496a482f46f41a3e1db56891 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 16 Jul 2020 12:02:47 +0100
Subject: [PATCH] drm/vc4: Add DRM_MODE_FLAG_DBLCLK support to
vc4-fkms
480i and several other modes use DRM_MODE_FLAG_DBLCLK and pixel
replication.
Add in flags for that so that FKMS can select CEA modes 6 & 7.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
@@ -158,6 +158,8 @@ struct set_timings {
#define TIMINGS_FLAGS_RGB_LIMITED BIT(8)
/* DVI monitor, therefore disable infoframes. Not set corresponds to HDMI. */
#define TIMINGS_FLAGS_DVI BIT(9)
+/* Double clock */
+#define TIMINGS_FLAGS_DBL_CLK BIT(10)
};
struct mailbox_set_mode {
@@ -946,6 +948,8 @@ static void vc4_crtc_mode_set_nofb(struc
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
mb.timings.flags |= TIMINGS_FLAGS_INTERLACE;
+ if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+ mb.timings.flags |= TIMINGS_FLAGS_DBL_CLK;
mb.timings.video_id_code = frame.avi.video_code;
@@ -1104,11 +1108,16 @@ vc4_crtc_mode_valid(struct drm_crtc *crt
*/
if (fkms->bcm2711 &&
(vc4_crtc->display_number == 2 || vc4_crtc->display_number == 7) &&
+ !(mode->flags & DRM_MODE_FLAG_DBLCLK) &&
((mode->hdisplay | /* active */
(mode->hsync_start - mode->hdisplay) | /* front porch */
(mode->hsync_end - mode->hsync_start) | /* sync pulse */
- (mode->htotal - mode->hsync_end)) & 1)) /* back porch */
+ (mode->htotal - mode->hsync_end)) & 1)) /* back porch */ {
+ DRM_DEBUG_KMS("[CRTC:%d] Odd timing rejected %u %u %u %u.\n",
+ crtc->base.id, mode->hdisplay, mode->hsync_start,
+ mode->hsync_end, mode->htotal);
return MODE_H_ILLEGAL;
+ }
return MODE_OK;
}
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