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drm: Mark constant arrays of drm_display_mode const

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... and fixup some methods to accept the constant argument.

Now that constant module arrays are loaded into read-only memory, using
const appropriately has some benefits beyond warning the programmer
about likely mistakes.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Chris Wilson 2011-01-26 09:49:47 +00:00 committed by Dave Airlie
parent 60b212f8dd
commit b1f559ecdc
9 changed files with 27 additions and 23 deletions
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19
drivers/gpu/drm/drm_edid.c
View File

@ -449,12 +449,11 @@ static void edid_fixup_preferred(struct drm_connector *connector,
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
{
struct drm_display_mode *mode = NULL;
int i;
struct drm_display_mode *ptr, *mode;
mode = NULL;
for (i = 0; i < drm_num_dmt_modes; i++) {
ptr = &drm_dmt_modes[i];
const struct drm_display_mode *ptr = &drm_dmt_modes[i];
if (hsize == ptr->hdisplay &&
vsize == ptr->vdisplay &&
fresh == drm_mode_vrefresh(ptr)) {
@ -885,7 +884,7 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
}
static bool
mode_is_rb(struct drm_display_mode *mode)
mode_is_rb(const struct drm_display_mode *mode)
{
return (mode->htotal - mode->hdisplay == 160) &&
(mode->hsync_end - mode->hdisplay == 80) &&
@ -894,7 +893,8 @@ mode_is_rb(struct drm_display_mode *mode)
}
static bool
mode_in_hsync_range(struct drm_display_mode *mode, struct edid *edid, u8 *t)
mode_in_hsync_range(const struct drm_display_mode *mode,
struct edid *edid, u8 *t)
{
int hsync, hmin, hmax;
@ -910,7 +910,8 @@ mode_in_hsync_range(struct drm_display_mode *mode, struct edid *edid, u8 *t)
}
static bool
mode_in_vsync_range(struct drm_display_mode *mode, struct edid *edid, u8 *t)
mode_in_vsync_range(const struct drm_display_mode *mode,
struct edid *edid, u8 *t)
{
int vsync, vmin, vmax;
@ -941,7 +942,7 @@ range_pixel_clock(struct edid *edid, u8 *t)
}
static bool
mode_in_range(struct drm_display_mode *mode, struct edid *edid,
mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
struct detailed_timing *timing)
{
u32 max_clock;
@ -1472,7 +1473,7 @@ int drm_add_modes_noedid(struct drm_connector *connector,
int hdisplay, int vdisplay)
{
int i, count, num_modes = 0;
struct drm_display_mode *mode, *ptr;
struct drm_display_mode *mode;
struct drm_device *dev = connector->dev;
count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
@ -1482,7 +1483,7 @@ int drm_add_modes_noedid(struct drm_connector *connector,
vdisplay = 0;
for (i = 0; i < count; i++) {
ptr = &drm_dmt_modes[i];
const struct drm_display_mode *ptr = &drm_dmt_modes[i];
if (hdisplay && vdisplay) {
/*
* Only when two are valid, they will be used to check

4
drivers/gpu/drm/drm_edid_modes.h
View File

@ -32,7 +32,7 @@
* This table is copied from xfree86/modes/xf86EdidModes.c.
* But the mode with Reduced blank feature is deleted.
*/
static struct drm_display_mode drm_dmt_modes[] = {
static const struct drm_display_mode drm_dmt_modes[] = {
/* 640x350@85Hz */
{ DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
736, 832, 0, 350, 382, 385, 445, 0,
@ -266,7 +266,7 @@ static struct drm_display_mode drm_dmt_modes[] = {
static const int drm_num_dmt_modes =
sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
static struct drm_display_mode edid_est_modes[] = {
static const struct drm_display_mode edid_est_modes[] = {
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
968, 1056, 0, 600, 601, 605, 628, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */

6
drivers/gpu/drm/drm_modes.c
View File

@ -593,7 +593,7 @@ EXPORT_SYMBOL(drm_mode_height);
*
* Return @modes's hsync rate in kHz, rounded to the nearest int.
*/
int drm_mode_hsync(struct drm_display_mode *mode)
int drm_mode_hsync(const struct drm_display_mode *mode)
{
unsigned int calc_val;
@ -627,7 +627,7 @@ EXPORT_SYMBOL(drm_mode_hsync);
* If it is 70.288, it will return 70Hz.
* If it is 59.6, it will return 60Hz.
*/
int drm_mode_vrefresh(struct drm_display_mode *mode)
int drm_mode_vrefresh(const struct drm_display_mode *mode)
{
int refresh = 0;
unsigned int calc_val;
@ -725,7 +725,7 @@ EXPORT_SYMBOL(drm_mode_set_crtcinfo);
* a pointer to it. Used to create new instances of established modes.
*/
struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
struct drm_display_mode *mode)
const struct drm_display_mode *mode)
{
struct drm_display_mode *nmode;
int new_id;

2
drivers/gpu/drm/i915/intel_sdvo.c
View File

@ -1460,7 +1460,7 @@ static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
* Note! This is in reply order (see loop in get_tv_modes).
* XXX: all 60Hz refresh?
*/
struct drm_display_mode sdvo_tv_modes[] = {
static const struct drm_display_mode sdvo_tv_modes[] = {
{ DRM_MODE("320x200", DRM_MODE_TYPE_DRIVER, 5815, 320, 321, 384,
416, 0, 200, 201, 232, 233, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },

4
drivers/gpu/drm/nouveau/nv17_tv.c
View File

@ -197,10 +197,12 @@ static int nv17_tv_get_ld_modes(struct drm_encoder *encoder,
struct drm_connector *connector)
{
struct nv17_tv_norm_params *tv_norm = get_tv_norm(encoder);
struct drm_display_mode *mode, *tv_mode;
const struct drm_display_mode *tv_mode;
int n = 0;
for (tv_mode = nv17_tv_modes; tv_mode->hdisplay; tv_mode++) {
struct drm_display_mode *mode;
mode = drm_mode_duplicate(encoder->dev, tv_mode);
mode->clock = tv_norm->tv_enc_mode.vrefresh *

2
drivers/gpu/drm/nouveau/nv17_tv.h
View File

@ -112,7 +112,7 @@ extern struct nv17_tv_norm_params {
} nv17_tv_norms[NUM_TV_NORMS];
#define get_tv_norm(enc) (&nv17_tv_norms[to_tv_enc(enc)->tv_norm])
extern struct drm_display_mode nv17_tv_modes[];
extern const struct drm_display_mode nv17_tv_modes[];
static inline int interpolate(int y0, int y1, int y2, int x)
{

2
drivers/gpu/drm/nouveau/nv17_tv_modes.c
View File

@ -438,7 +438,7 @@ void nv17_tv_state_load(struct drm_device *dev, struct nv17_tv_state *state)
/* Timings similar to the ones the blob sets */
struct drm_display_mode nv17_tv_modes[] = {
const struct drm_display_mode nv17_tv_modes[] = {
{ DRM_MODE("320x200", DRM_MODE_TYPE_DRIVER, 0,
320, 344, 392, 560, 0, 200, 200, 202, 220, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC

5
drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
View File

@ -345,7 +345,7 @@ static enum drm_connector_status
return connector_status_disconnected;
}
static struct drm_display_mode vmw_ldu_connector_builtin[] = {
static const struct drm_display_mode vmw_ldu_connector_builtin[] = {
/* 640x480@60Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
752, 800, 0, 480, 489, 492, 525, 0,
@ -429,7 +429,6 @@ static int vmw_ldu_connector_fill_modes(struct drm_connector *connector,
struct drm_device *dev = connector->dev;
struct vmw_private *dev_priv = vmw_priv(dev);
struct drm_display_mode *mode = NULL;
struct drm_display_mode *bmode;
struct drm_display_mode prefmode = { DRM_MODE("preferred",
DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@ -459,6 +458,8 @@ static int vmw_ldu_connector_fill_modes(struct drm_connector *connector,
}
for (i = 0; vmw_ldu_connector_builtin[i].type != 0; i++) {
const struct drm_display_mode *bmode;
bmode = &vmw_ldu_connector_builtin[i];
if (bmode->hdisplay > max_width ||
bmode->vdisplay > max_height)

6
include/drm/drm_crtc.h
View File

@ -659,7 +659,7 @@ extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid
extern void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
extern void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode);
extern struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
struct drm_display_mode *mode);
const struct drm_display_mode *mode);
extern void drm_mode_debug_printmodeline(struct drm_display_mode *mode);
extern void drm_mode_config_init(struct drm_device *dev);
extern void drm_mode_config_reset(struct drm_device *dev);
@ -685,8 +685,8 @@ extern void drm_mode_validate_size(struct drm_device *dev,
extern void drm_mode_prune_invalid(struct drm_device *dev,
struct list_head *mode_list, bool verbose);
extern void drm_mode_sort(struct list_head *mode_list);
extern int drm_mode_hsync(struct drm_display_mode *mode);
extern int drm_mode_vrefresh(struct drm_display_mode *mode);
extern int drm_mode_hsync(const struct drm_display_mode *mode);
extern int drm_mode_vrefresh(const struct drm_display_mode *mode);
extern void drm_mode_set_crtcinfo(struct drm_display_mode *p,
int adjust_flags);
extern void drm_mode_connector_list_update(struct drm_connector *connector);