Hi,looks good to me. Let's wait until next week before landing the patch, so that others can comment on it.
Best regards Thomas Am 30.09.22 um 11:47 schrieb Jocelyn Falempe:
The current ast driver only supports legacy gamma interface. This also fixes a Gnome3/Wayland error which incorrectly adds gamma to atomic commit: "Page flip discarded: CRTC property (GAMMA_LUT) not found" I only tested remotely, so I wasn't able to check that it had an effect on the VGA output. But when activating "Night Light" in Gnome, ast_crtc_load_lut() is called. v2: use the same functions as mgag200. handle 16bits color mode. v3: Check gamma_lut size in atomic check. v4: revert 16bits mode, v1 was correct. make sure gamma table are set when primary plane format changes. remove rgb888 format that is not used. Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> Tested-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/ast/ast_mode.c | 87 +++++++++++++++++++++++++++------- 1 file changed, 70 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c index 214b10178454..89fcb8e3ea16 100644 --- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -49,6 +49,8 @@ #include "ast_drv.h" #include "ast_tables.h"+#define AST_LUT_SIZE 256+ static inline void ast_load_palette_index(struct ast_private *ast, u8 index, u8 red, u8 green, u8 blue) @@ -63,20 +65,46 @@ static inline void ast_load_palette_index(struct ast_private *ast, ast_io_read8(ast, AST_IO_SEQ_PORT); }-static void ast_crtc_load_lut(struct ast_private *ast, struct drm_crtc *crtc)+static void ast_crtc_set_gamma_linear(struct ast_private *ast, + const struct drm_format_info *format) { - u16 *r, *g, *b; int i;- if (!crtc->enabled)- return; + switch (format->format) { + case DRM_FORMAT_C8: /* In this case, gamma table is used as color palette */ + case DRM_FORMAT_RGB565: + case DRM_FORMAT_XRGB8888: + for (i = 0; i < AST_LUT_SIZE; i++) + ast_load_palette_index(ast, i, i, i, i); + break; + default: + drm_warn_once(&ast->base, "Unsupported format %p4cc for gamma correction\n", + &format->format); + break; + } +}- r = crtc->gamma_store;- g = r + crtc->gamma_size; - b = g + crtc->gamma_size; +static void ast_crtc_set_gamma(struct ast_private *ast, + const struct drm_format_info *format, + struct drm_color_lut *lut) +{ + int i;- for (i = 0; i < 256; i++)- ast_load_palette_index(ast, i, *r++ >> 8, *g++ >> 8, *b++ >> 8); + switch (format->format) { + case DRM_FORMAT_C8: /* In this case, gamma table is used as color palette */ + case DRM_FORMAT_RGB565: + case DRM_FORMAT_XRGB8888: + for (i = 0; i < AST_LUT_SIZE; i++) + ast_load_palette_index(ast, i, + lut[i].red >> 8, + lut[i].green >> 8, + lut[i].blue >> 8); + break; + default: + drm_warn_once(&ast->base, "Unsupported format %p4cc for gamma correction\n", + &format->format); + break; + } }static bool ast_get_vbios_mode_info(const struct drm_format_info *format,@@ -1018,9 +1046,11 @@ static void ast_crtc_dpms(struct drm_crtc *crtc, int mode)ast_set_color_reg(ast, format);ast_set_vbios_color_reg(ast, format, vbios_mode_info); + if (crtc->state->gamma_lut) + ast_crtc_set_gamma(ast, format, crtc->state->gamma_lut->data); + else + ast_crtc_set_gamma_linear(ast, format); } - - ast_crtc_load_lut(ast, crtc); break; case DRM_MODE_DPMS_STANDBY: case DRM_MODE_DPMS_SUSPEND: @@ -1109,6 +1139,8 @@ static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state) { struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); + struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc); + struct ast_crtc_state *old_ast_crtc_state = to_ast_crtc_state(old_crtc_state); struct drm_device *dev = crtc->dev; struct ast_crtc_state *ast_state; const struct drm_format_info *format; @@ -1128,6 +1160,22 @@ static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc, if (drm_WARN_ON_ONCE(dev, !format)) return -EINVAL; /* BUG: We didn't set format in primary check(). */+ /*+ * The gamma LUT has to be reloaded after changing the primary + * plane's color format. + */ + if (old_ast_crtc_state->format != format) + crtc_state->color_mgmt_changed = true; + + if (crtc_state->color_mgmt_changed && crtc_state->gamma_lut) { + if (crtc_state->gamma_lut->length != + AST_LUT_SIZE * sizeof(struct drm_color_lut)) { + drm_err(dev, "Wrong size for gamma_lut %zu\n", + crtc_state->gamma_lut->length); + return -EINVAL; + } + } + succ = ast_get_vbios_mode_info(format, &crtc_state->mode, &crtc_state->adjusted_mode, &ast_state->vbios_mode_info); @@ -1158,20 +1206,23 @@ ast_crtc_helper_atomic_flush(struct drm_crtc *crtc, { struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); - struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, - crtc); struct drm_device *dev = crtc->dev; struct ast_private *ast = to_ast_private(dev); struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state); - struct ast_crtc_state *old_ast_crtc_state = to_ast_crtc_state(old_crtc_state); struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info;/** The gamma LUT has to be reloaded after changing the primary * plane's color format. */ - if (old_ast_crtc_state->format != ast_crtc_state->format) - ast_crtc_load_lut(ast, crtc); + if (crtc_state->enable && crtc_state->color_mgmt_changed) { + if (crtc_state->gamma_lut) + ast_crtc_set_gamma(ast, + ast_crtc_state->format, + crtc_state->gamma_lut->data); + else + ast_crtc_set_gamma_linear(ast, ast_crtc_state->format); + }//Set Aspeed Display-Portif (ast->tx_chip_types & AST_TX_ASTDP_BIT) @@ -1309,7 +1360,9 @@ static int ast_crtc_init(struct drm_device *dev) if (ret) return ret;- drm_mode_crtc_set_gamma_size(crtc, 256);+ drm_mode_crtc_set_gamma_size(crtc, AST_LUT_SIZE); + drm_crtc_enable_color_mgmt(crtc, 0, false, AST_LUT_SIZE); + drm_crtc_helper_add(crtc, &ast_crtc_helper_funcs);return 0;
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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