Merge tag 'drm-misc-fixes-2020-11-26' of ssh://git.freedesktop.org/git/drm/drm-misc into drm-fixesdrm-fixes-2020-11-27-1drm-fixes-2020-11-27

A bunch of fixes for vc4 fixing some coexistence issue between wifi and
HDMI, unsupported modes, and vblank timeouts, a fix for ast to reload
the gamma LUT after changing the plane format and a double-free fix for
nouveau

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201126085450.r3i7wvj7pizsa4l6@gilmour

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 95779d50cca0..afc178b0d89f 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -760,12 +760,54 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
 {
 }
 
+#define WIFI_2_4GHz_CH1_MIN_FREQ	2400000000ULL
+#define WIFI_2_4GHz_CH1_MAX_FREQ	2422000000ULL
+
+static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
+					 struct drm_crtc_state *crtc_state,
+					 struct drm_connector_state *conn_state)
+{
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+	unsigned long long pixel_rate = mode->clock * 1000;
+	unsigned long long tmds_rate;
+
+	if (vc4_hdmi->variant->unsupported_odd_h_timings &&
+	    ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
+	     (mode->hsync_end % 2) || (mode->htotal % 2)))
+		return -EINVAL;
+
+	/*
+	 * The 1440p@60 pixel rate is in the same range than the first
+	 * WiFi channel (between 2.4GHz and 2.422GHz with 22MHz
+	 * bandwidth). Slightly lower the frequency to bring it out of
+	 * the WiFi range.
+	 */
+	tmds_rate = pixel_rate * 10;
+	if (vc4_hdmi->disable_wifi_frequencies &&
+	    (tmds_rate >= WIFI_2_4GHz_CH1_MIN_FREQ &&
+	     tmds_rate <= WIFI_2_4GHz_CH1_MAX_FREQ)) {
+		mode->clock = 238560;
+		pixel_rate = mode->clock * 1000;
+	}
+
+	if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
+		return -EINVAL;
+
+	return 0;
+}
+
 static enum drm_mode_status
 vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
 			    const struct drm_display_mode *mode)
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 
+	if (vc4_hdmi->variant->unsupported_odd_h_timings &&
+	    ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
+	     (mode->hsync_end % 2) || (mode->htotal % 2)))
+		return MODE_H_ILLEGAL;
+
 	if ((mode->clock * 1000) > vc4_hdmi->variant->max_pixel_clock)
 		return MODE_CLOCK_HIGH;
 
@@ -773,6 +815,7 @@ vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
 }
 
 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
+	.atomic_check = vc4_hdmi_encoder_atomic_check,
 	.mode_valid = vc4_hdmi_encoder_mode_valid,
 	.disable = vc4_hdmi_encoder_disable,
 	.enable = vc4_hdmi_encoder_enable,
@@ -1694,6 +1737,9 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 		vc4_hdmi->hpd_active_low = hpd_gpio_flags & OF_GPIO_ACTIVE_LOW;
 	}
 
+	vc4_hdmi->disable_wifi_frequencies =
+		of_property_read_bool(dev->of_node, "wifi-2.4ghz-coexistence");
+
 	pm_runtime_enable(dev);
 
 	drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
@@ -1817,6 +1863,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
 		PHY_LANE_2,
 		PHY_LANE_CK,
 	},
+	.unsupported_odd_h_timings	= true,
 
 	.init_resources		= vc5_hdmi_init_resources,
 	.csc_setup		= vc5_hdmi_csc_setup,
@@ -1842,6 +1889,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
 		PHY_LANE_CK,
 		PHY_LANE_2,
 	},
+	.unsupported_odd_h_timings	= true,
 
 	.init_resources		= vc5_hdmi_init_resources,
 	.csc_setup		= vc5_hdmi_csc_setup,