From f70575805708cabdedea7498aaa3f710fde4d920 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 03:29:01 +0000
Subject: [PATCH] add lvds1024*800
---
kernel/drivers/gpu/drm/sun4i/sun4i_rgb.c | 111 +++++++++++++++++++++++++++++--------------------------
1 files changed, 59 insertions(+), 52 deletions(-)
diff --git a/kernel/drivers/gpu/drm/sun4i/sun4i_rgb.c b/kernel/drivers/gpu/drm/sun4i/sun4i_rgb.c
index bf068da..e172426 100644
--- a/kernel/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/kernel/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -1,22 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2015 Free Electrons
* Copyright (C) 2015 NextThing Co
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
*/
#include <linux/clk.h>
-#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc_helper.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
#include "sun4i_crtc.h"
#include "sun4i_tcon.h"
@@ -27,6 +25,8 @@
struct drm_encoder encoder;
struct sun4i_tcon *tcon;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
};
static inline struct sun4i_rgb *
@@ -47,10 +47,17 @@
{
struct sun4i_rgb *rgb =
drm_connector_to_sun4i_rgb(connector);
- struct sun4i_tcon *tcon = rgb->tcon;
- return drm_panel_get_modes(tcon->panel);
+ return drm_panel_get_modes(rgb->panel, connector);
}
+
+/*
+ * VESA DMT defines a tolerance of 0.5% on the pixel clock, while the
+ * CVT spec reuses that tolerance in its examples, so it looks to be a
+ * good default tolerance for the EDID-based modes. Define it to 5 per
+ * mille to avoid floating point operations.
+ */
+#define SUN4I_RGB_DOTCLOCK_TOLERANCE_PER_MILLE 5
static enum drm_mode_status sun4i_rgb_mode_valid(struct drm_encoder *crtc,
const struct drm_display_mode *mode)
@@ -59,8 +66,9 @@
struct sun4i_tcon *tcon = rgb->tcon;
u32 hsync = mode->hsync_end - mode->hsync_start;
u32 vsync = mode->vsync_end - mode->vsync_start;
- unsigned long rate = mode->clock * 1000;
- long rounded_rate;
+ unsigned long long rate = mode->clock * 1000;
+ unsigned long long lowest, highest;
+ unsigned long long rounded_rate;
DRM_DEBUG_DRIVER("Validating modes...\n");
@@ -92,31 +100,51 @@
DRM_DEBUG_DRIVER("Vertical parameters OK\n");
+ /*
+ * TODO: We should use the struct display_timing if available
+ * and / or trying to stretch the timings within that
+ * tolerancy to take care of panels that we wouldn't be able
+ * to have a exact match for.
+ */
+ if (rgb->panel) {
+ DRM_DEBUG_DRIVER("RGB panel used, skipping clock rate checks");
+ goto out;
+ }
+
+ /*
+ * That shouldn't ever happen unless something is really wrong, but it
+ * doesn't harm to check.
+ */
+ if (!rgb->bridge)
+ goto out;
+
tcon->dclk_min_div = 6;
tcon->dclk_max_div = 127;
rounded_rate = clk_round_rate(tcon->dclk, rate);
- if (rounded_rate < rate)
+
+ lowest = rate * (1000 - SUN4I_RGB_DOTCLOCK_TOLERANCE_PER_MILLE);
+ do_div(lowest, 1000);
+ if (rounded_rate < lowest)
return MODE_CLOCK_LOW;
- if (rounded_rate > rate)
+ highest = rate * (1000 + SUN4I_RGB_DOTCLOCK_TOLERANCE_PER_MILLE);
+ do_div(highest, 1000);
+ if (rounded_rate > highest)
return MODE_CLOCK_HIGH;
+out:
DRM_DEBUG_DRIVER("Clock rate OK\n");
return MODE_OK;
}
-static struct drm_connector_helper_funcs sun4i_rgb_con_helper_funcs = {
+static const struct drm_connector_helper_funcs sun4i_rgb_con_helper_funcs = {
.get_modes = sun4i_rgb_get_modes,
};
static void
sun4i_rgb_connector_destroy(struct drm_connector *connector)
{
- struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector);
- struct sun4i_tcon *tcon = rgb->tcon;
-
- drm_panel_detach(tcon->panel);
drm_connector_cleanup(connector);
}
@@ -131,48 +159,36 @@
static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
{
struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
- struct sun4i_tcon *tcon = rgb->tcon;
DRM_DEBUG_DRIVER("Enabling RGB output\n");
- if (!IS_ERR(tcon->panel)) {
- drm_panel_prepare(tcon->panel);
- drm_panel_enable(tcon->panel);
+ if (rgb->panel) {
+ drm_panel_prepare(rgb->panel);
+ drm_panel_enable(rgb->panel);
}
}
static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
{
struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
- struct sun4i_tcon *tcon = rgb->tcon;
DRM_DEBUG_DRIVER("Disabling RGB output\n");
- if (!IS_ERR(tcon->panel)) {
- drm_panel_disable(tcon->panel);
- drm_panel_unprepare(tcon->panel);
+ if (rgb->panel) {
+ drm_panel_disable(rgb->panel);
+ drm_panel_unprepare(rgb->panel);
}
}
-static struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = {
+static const struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = {
.disable = sun4i_rgb_encoder_disable,
.enable = sun4i_rgb_encoder_enable,
.mode_valid = sun4i_rgb_mode_valid,
};
-static void sun4i_rgb_enc_destroy(struct drm_encoder *encoder)
-{
- drm_encoder_cleanup(encoder);
-}
-
-static struct drm_encoder_funcs sun4i_rgb_enc_funcs = {
- .destroy = sun4i_rgb_enc_destroy,
-};
-
int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon)
{
struct drm_encoder *encoder;
- struct drm_bridge *bridge;
struct sun4i_rgb *rgb;
int ret;
@@ -183,7 +199,7 @@
encoder = &rgb->encoder;
ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0,
- &tcon->panel, &bridge);
+ &rgb->panel, &rgb->bridge);
if (ret) {
dev_info(drm->dev, "No panel or bridge found... RGB output disabled\n");
return 0;
@@ -191,11 +207,8 @@
drm_encoder_helper_add(&rgb->encoder,
&sun4i_rgb_enc_helper_funcs);
- ret = drm_encoder_init(drm,
- &rgb->encoder,
- &sun4i_rgb_enc_funcs,
- DRM_MODE_ENCODER_NONE,
- NULL);
+ ret = drm_simple_encoder_init(drm, &rgb->encoder,
+ DRM_MODE_ENCODER_NONE);
if (ret) {
dev_err(drm->dev, "Couldn't initialise the rgb encoder\n");
goto err_out;
@@ -204,7 +217,7 @@
/* The RGB encoder can only work with the TCON channel 0 */
rgb->encoder.possible_crtcs = drm_crtc_mask(&tcon->crtc->crtc);
- if (tcon->panel) {
+ if (rgb->panel) {
drm_connector_helper_add(&rgb->connector,
&sun4i_rgb_con_helper_funcs);
ret = drm_connector_init(drm, &rgb->connector,
@@ -217,16 +230,10 @@
drm_connector_attach_encoder(&rgb->connector,
&rgb->encoder);
-
- ret = drm_panel_attach(tcon->panel, &rgb->connector);
- if (ret) {
- dev_err(drm->dev, "Couldn't attach our panel\n");
- goto err_cleanup_connector;
- }
}
- if (bridge) {
- ret = drm_bridge_attach(encoder, bridge, NULL);
+ if (rgb->bridge) {
+ ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0);
if (ret) {
dev_err(drm->dev, "Couldn't attach our bridge\n");
goto err_cleanup_connector;
--
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